These are the documents for my upcoming exam in hygiene can you make a few essays. My exam exam pattern is mcqs and oral. So make it accordingly
Asking for Preferences
I can send you the topics for my exam
Please go ahead and send the topics! Once I have them, I'll read through your documents and write focused essays tailored for both MCQ-style recall and oral exam answers.
Asking for Preferences
So these are the mcqs and oral questions asked to other students in the last session of the exam you can take these topics as important ones and we can start one by one atmosphere air then water ….
Reading File
Running Command
cd /home/daytona/workspace/attachments/656b058d-b76a-490e-9446-29bf31197794 && p…
Running Command
cd /home/daytona/workspace/attachments/656b058d-b76a-490e-9446-29bf31197794 && p…
Running Command
cd /home/daytona/workspace/attachments/656b058d-b76a-490e-9446-29bf31197794 && p…
Running Command
cd /home/daytona/workspace/attachments/656b058d-b76a-490e-9446-29bf31197794 && p…
Running Command
cd /home/daytona/workspace/attachments/656b058d-b76a-490e-9446-29bf31197794 && p…
Running Command
cd /home/daytona/workspace/attachments/656b058d-b76a-490e-9446-29bf31197794 && p…
Reading File
Running Command
mkdir -p /home/daytona/workspace/hygiene-essays && ls /home/daytona/workspace/hy…
Writing File
~/hygiene-essays/create_air_essays.js
const { Document, Packer, Paragraph, TextRun, HeadingLevel, AlignmentType, PageBreak, BorderStyle, WidthType } = require('docx');
const fs = require('fs');
const doc = new Document({
styles: {
default: {
document: {
run: { font: "Calibri", size: 24 }
}
}
},
sections: [{
properties: {},
children: [
// ── TITLE PAGE ──
new Paragraph({
alignment: AlignmentType.CENTER,
spacing: { before: 400, after: 200 },
children: [
new TextRun({ text: "HYGIENE & ECOLOGY", bold: true, size: 36, font: "Calibri" })
]
}),
new Paragraph({
alignment: AlignmentType.CENTER,
spacing: { after: 100 },
children: [
new TextRun({ text: "EXAM ESSAYS – ATMOSPHERE & AIR", bold: true, size: 28, font: "Calibri" })
]
}),
new Paragraph({
alignment: AlignmentType.CENTER,
spacing: { after: 100 },
children: [
new TextRun({ text: "Medical University – Plovdiv | 3rd Year, VI Semester", size: 22, italics: true, font: "Calibri" })
]
}),
new Paragraph({
alignment: AlignmentType.CENTER,
spacing: { after: 600 },
children: [
new TextRun({ text: "Topics 1–5 | Prepared for MCQ & Oral Examination", size: 22, italics: true, font: "Calibri" })
]
}),
new Paragraph({ children: [new PageBreak()] }),
// ── TABLE OF CONTENTS (manual) ──
new Paragraph({ heading: HeadingLevel.HEADING_1, children: [new TextRun({ text: "Contents", bold: true, size: 28 })] }),
...[
"Essay 1 – Hygiene as a Main Prophylactic Medical Science",
"Essay 2 – Atmosphere: Importance, Structure and Air Composition",
"Essay 3 – Hygiene Characteristics of Physical Factors of the Atmosphere",
"Essay 4 – Climate, Weather, Meteotropic Diseases and Acclimatization",
"Essay 5 – Air Pollutants, Smog and Prevention of Air Pollution",
].map(t => new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: t, size: 22, font: "Calibri" })] })),
new Paragraph({ children: [new PageBreak()] }),
// ══════════════════════════════════════════════════
// ESSAY 1
// ══════════════════════════════════════════════════
new Paragraph({ heading: HeadingLevel.HEADING_1, spacing: { before: 200, after: 160 }, children: [new TextRun({ text: "Essay 1: Hygiene as a Main Prophylactic Medical Science", bold: true, size: 30, color: "1F4E79" })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Definition and Subject Matter", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "Hygiene is the science of health preservation and disease prevention. Its name derives from the Greek word 'hygienos' (healthy). As the principal prophylactic (preventive) medical science, hygiene studies the influence of environmental factors – physical, chemical, biological, and social – on human health and the capacity for work. The ultimate goal is to develop hygienic norms, rules, and recommendations that protect individual and population health.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Aim and Tasks", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "The main AIM of hygiene is to preserve and strengthen human health, to increase working capacity, and to prolong life. Its key TASKS are:", size: 22 })] }),
...[
"1. Study the influence of environmental factors on the human organism.",
"2. Identify and evaluate health risks in the environment.",
"3. Establish hygienic norms and standards (maximum permissible concentrations – MPC).",
"4. Develop preventive measures and health-protective recommendations.",
"5. Perform state sanitary control and epidemiological surveillance."
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Main Branches of Hygiene", bold: true, size: 26 })] }),
...[
"• Communal (Environmental) Hygiene – air, water, soil, housing, urban areas.",
"• Occupational (Labour) Hygiene – work conditions, occupational hazards.",
"• Nutrition Hygiene – food quality, nutritional adequacy, foodborne diseases.",
"• Childhood and Adolescent Hygiene – development, schools, physical education.",
"• Hospital Hygiene – healthcare facilities, nosocomial infections.",
"• Radiation Hygiene – ionizing and non-ionizing radiation.",
"• Social Hygiene and Healthcare Organisation.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Methods Used in Hygiene", bold: true, size: 26 })] }),
...[
"• Epidemiological method – population-based studies of disease distribution and determinants.",
"• Hygienic investigation – measurement and assessment of environmental factors.",
"• Laboratory methods – chemical, physical, microbiological analysis.",
"• Experimental methods – animal studies, controlled human experiments.",
"• Statistical methods – analysis and interpretation of health data.",
"• Social and questionnaire methods – surveys, interviews.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "MCQ Key Points to Remember", bold: true, size: 26, color: "C00000" })] }),
...[
"✔ Hygiene is the PRIMARY prophylactic (preventive) science – not therapeutic.",
"✔ Hygienic norms define the Maximum Permissible Concentration (MPC) of harmful substances.",
"✔ State sanitary control is carried out by the Regional Health Inspectorate (RHI).",
"✔ Methods include both field (investigation) and laboratory approaches.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22, italics: true })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Oral Exam Tips", bold: true, size: 26, color: "375623" })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "When asked to define hygiene, state: subject (environmental factors affecting health), aim (preserve and improve health), tasks (5 tasks), branches (at least 5), and methods (at least 4). Mention that it is a PROPHYLACTIC science, distinguishing it from clinical medicine which is curative. Mention the connection with ecology – Medical Ecology studies the mutual relationship between organisms and the environment.", size: 22 })] }),
new Paragraph({ children: [new PageBreak()] }),
// ══════════════════════════════════════════════════
// ESSAY 2
// ══════════════════════════════════════════════════
new Paragraph({ heading: HeadingLevel.HEADING_1, spacing: { before: 200, after: 160 }, children: [new TextRun({ text: "Essay 2: Atmosphere – Importance, Structure and Air Composition", bold: true, size: 30, color: "1F4E79" })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Importance of the Atmosphere", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "The atmosphere is the gaseous envelope surrounding the Earth. It is indispensable for life because it: (1) provides oxygen for respiration; (2) absorbs harmful ultraviolet (UV) solar radiation via the ozone layer; (3) retains heat through the greenhouse effect, stabilising surface temperatures; (4) reduces day-night temperature extremes (diurnal variation). Without the atmosphere, life as we know it would be impossible.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Structure of the Atmosphere", bold: true, size: 26 })] }),
...[
"• Troposphere (0–10 km): Contains ~80% of atmospheric air mass. This is the layer of immediate hygienic importance – the layer we breathe, where weather occurs and air pollution takes place. When hygienists refer to 'the atmosphere,' they mean the troposphere.",
"• Stratosphere (10–50 km): Contains the ozone layer that absorbs UV radiation. Ozone depletion in this layer increases UV reaching the surface, raising the risk of skin cancer.",
"• Mesosphere (50–80 km): Temperatures drop with altitude; meteors burn up here.",
"• Thermosphere (80–500 km): Very high temperatures due to solar radiation absorption.",
"• Exosphere (500–10,000 km): Outer boundary; merges with space; interacts with the magnetosphere.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Normal Air Composition", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Air is a MECHANICAL MIXTURE of gases (not a chemical compound). Normal composition (% by volume):", size: 22 })] }),
...[
"• Nitrogen (N₂): 78.1% – Serves to dilute oxygen. Under normal pressure it has no physiological effect. At high pressures (deep diving >30 m) it can cause nitrogen narcosis.",
"• Oxygen (O₂): 20.9% – Essential for respiration. Critical hygiene value: 17 vol% (fatigue and discomfort begin). At 8 vol% → death. Patients with anaemia, CVD or lung disease are more sensitive to oxygen deficiency.",
"• Carbon Dioxide (CO₂): 0.03–0.04% – Used as a marker of air quality in closed spaces and ventilation adequacy. >2 vol% causes severe breathing difficulty. It plays a role in climate formation (greenhouse gas).",
"• Others (Ar, Ne, Kr, Xe, He, Rn): ~1% – Rare gases; Radon (Rn) is important as a naturally occurring radioactive gas that can accumulate in poorly ventilated indoor spaces, increasing lung cancer risk.",
"• Water vapour: Variable – significant for humidity and thermoregulation.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "MCQ Key Points to Remember", bold: true, size: 26, color: "C00000" })] }),
...[
"✔ Troposphere = 80% of atmospheric air = hygienic importance layer.",
"✔ Air is a mechanical mixture (NOT a chemical compound).",
"✔ N₂ = 78.1%, O₂ = 20.9%, CO₂ = 0.03–0.04%.",
"✔ O₂ critical level = 17 vol% (feeling of fatigue); death at 8 vol%.",
"✔ CO₂ >2 vol% = severe breathing difficulty.",
"✔ CO₂ used to assess air quality/ventilation in closed rooms.",
"✔ Radon – naturally radioactive gas; lung cancer risk indoors.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22, italics: true })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Oral Exam Tips", bold: true, size: 26, color: "375623" })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "Start with: 'The atmosphere is the gaseous envelope of the Earth retained by gravity.' Then describe its 5 layers with altitudes. Emphasise that for hygiene purposes the troposphere is most important. When discussing air composition, always state the exact percentages. A common oral question is about CO₂ – distinguish its atmospheric level (0.03–0.04%) from its indoor warning level (>2%) and its role as an air quality indicator in ventilation assessment.", size: 22 })] }),
new Paragraph({ children: [new PageBreak()] }),
// ══════════════════════════════════════════════════
// ESSAY 3
// ══════════════════════════════════════════════════
new Paragraph({ heading: HeadingLevel.HEADING_1, spacing: { before: 200, after: 160 }, children: [new TextRun({ text: "Essay 3: Hygiene Characteristics of Physical Factors of the Atmosphere", bold: true, size: 30, color: "1F4E79" })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "Physical factors of the atmosphere are highly variable compared to chemical composition. Their instability directly affects human health and working capacity. They are divided into two main groups:", size: 22 })] }),
...[
"1. Meteorological factors: atmospheric pressure, air temperature, humidity, air velocity, atmospheric electricity, air ionisation.",
"2. Space-origin factors: solar radiation (UV, visible, IR), heliomagnetic factors.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "I. Atmospheric (Barometric) Pressure", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Normal atmospheric pressure at sea level is ~760 mmHg (1 atm). It is equalised in body cavities via the respiratory tract.", size: 22 })] }),
new Paragraph({ spacing: { after: 60 }, children: [new TextRun({ text: "A. Health Effects of INCREASED Pressure (hyperbaric – diving, caissons):", bold: true, size: 22 })] }),
...[
"• Ear barotrauma (barotitis) – relative vacuum in middle ear; feeling of fullness, decreased hearing.",
"• The 'Squeeze' – dyspnoea, heavy chest sensation, bulging eyes, haemorrhages in lungs/GIT/nose.",
"• Nitrogen narcosis – occurs at depths >30 m; symptoms: numbness, incoordination, hallucination, unconsciousness. Prevented by breathing helium-depleted nitrogen mixtures.",
"• Decompression sickness (DS) – rapid decompression causes nitrogen bubble formation in blood and tissues → capillary blockage and emboli. If in lungs: dyspnoea, pulmonary oedema. If in brain: convulsions, hemiplegia, coma.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 720 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ spacing: { after: 60 }, children: [new TextRun({ text: "B. Health Effects of DECREASED Pressure (hypobaric – high altitude):", bold: true, size: 22 })] }),
...[
"• Acute Mountain Sickness (altitude sickness) – headache, vomiting, impaired vision.",
"• High-altitude pulmonary oedema – occurs ~day 3 at altitude; cough, Cheyne-Stokes breathing.",
"Note: O₂ percentage remains 20.9% but the barometric partial pressure of O₂ decreases, reducing the alveolar-tissue O₂ gradient.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 720 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "II. Air Temperature", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Air is heated primarily by infrared radiation from the ground (not directly by the sun – only ~0.02% direct heating). Factors affecting air temperature: geographic latitude, altitude, wind direction, proximity to sea or large water bodies, vegetation.", size: 22 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Average annual temperature in Bulgaria: 11.5°C. Thermal equilibrium between body and environment occurs through radiation, conduction, convection, and evaporation (perspiration). It depends on air temperature, radiant temperature, humidity, air movement, and metabolic rate.", size: 22 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Heat-related disorders: heat stroke (thermoregulation failure), sun stroke (direct sun on head), heat exhaustion, heat syncope, cold stress.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "III. Air Humidity", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Humidity = water vapour content of air. Expressed as ABSOLUTE (actual g/m³) or RELATIVE humidity (% of maximum possible at that temperature). Hygienic norm for relative humidity: 30–60%.", size: 22 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Dew point: temperature at which air becomes saturated and water condenses. Measured with a psychrometer (MCQ: What measures air humidity? = Psychrometer/Psychrometry).", size: 22 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Role in thermoregulation: High humidity at high temperature → impairs evaporation of sweat → heat accumulation. Low humidity in winter → dryness of mucous membranes → increased infections.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "IV. Air Velocity", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Together with air temperature, humidity, and direction, air velocity determines the microclimate of a given area. Measured with an ANEMOMETER. High air velocity at low temperature → increases convective heat loss → risk of hypothermia. High air velocity at high temperature → beneficial cooling effect.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "V. Solar Radiation", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 60 }, children: [new TextRun({ text: "Solar spectrum includes:", size: 22 })] }),
...[
"• UV radiation (<400 nm): Non-specific effects – stimulates metabolism of proteins, lipids, carbohydrates; increases melanin production; improves reactivity. Short UV = bactericidal. Middle UV = anti-rickets effect (Vitamin D synthesis). Long UV = cataracts (cumulative in workers), retinal damage, skin erythema (sunburn), skin cancer. MCQ: 'You cannot see UV but you can feel it' = FALSE (you cannot see OR feel UV – IR is felt as heat).",
"• Visible radiation (400–760 nm): Eye strain (asthenopia). Can disturb circadian rhythms affecting sleep, activity, food intake.",
"• Infrared radiation (IR, >760 nm): 59% of solar radiation at Earth's surface. Penetrates skin → heating. Chronic exposure → cataract, corneal/iris/retinal damage.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "VI. Air Ionisation", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Positive air ions INCREASE in polluted areas and indoors → unfavourable effects. Negative air ions PREDOMINATE in mountains, forests, near the sea and waterfalls → indicator of air purity → favourable health effects. Air ionisers use high voltage to produce negative ions for air purification.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "MCQ Key Points to Remember", bold: true, size: 26, color: "C00000" })] }),
...[
"✔ Air humidity measured by psychrometer. Hygienic norm: 30–60%.",
"✔ Air velocity measured by anemometer.",
"✔ Nitrogen narcosis at depths >30 m.",
"✔ Decompression sickness = nitrogen bubbles from rapid ascent.",
"✔ UV radiation: CANNOT be seen or felt (unlike IR which you feel as heat).",
"✔ IR = 59% of solar radiation at Earth's surface.",
"✔ Negative air ions = clean air (mountains, forests, waterfalls).",
"✔ WBGT (Wet Bulb Globe Temperature) index = physical method for complex microclimate evaluation.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22, italics: true })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Oral Exam Tips", bold: true, size: 26, color: "375623" })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "Structure your answer around the two groups: (1) meteorological factors and (2) space-origin factors. For each factor give: normal values/characteristics, health effects of excess/deficit, and measurement tools. Air temperature measurement tools include maximum/minimum thermometers, thermographs. Humidity tools: psychrometer, hygrometer. Air velocity: anemometer, katathermometer. Commonly asked oral topic: 'Air Temperature – measurement, tools, method' – describe the instruments (thermometers, thermograph for continuous recording, kata thermometer which measures both air temperature and velocity together for cooling power assessment).", size: 22 })] }),
new Paragraph({ children: [new PageBreak()] }),
// ══════════════════════════════════════════════════
// ESSAY 4
// ══════════════════════════════════════════════════
new Paragraph({ heading: HeadingLevel.HEADING_1, spacing: { before: 200, after: 160 }, children: [new TextRun({ text: "Essay 4: Climate, Weather, Meteotropic Diseases and Acclimatization", bold: true, size: 30, color: "1F4E79" })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Definitions", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "CLIMATE: The long-term weather regime specific to a given territory. It is a dynamic complex of meteorological and cosmic factors over a long period of time, characterised by the average expression of: atmospheric pressure, air temperature, humidity, wind velocity, solar radiation, precipitation, and atmospheric electricity.", size: 22 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "WEATHER: A dynamic complex of meteorological factors for a given place over a SHORT period of time.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Climate Classification", bold: true, size: 26 })] }),
...[
"• Macroclimate – related to a broad geographic zone.",
"• Mesoclimate – climate of small surface areas, not representative of the district climate.",
"• Microclimate – climate of a limited area or closed room (e.g. indoor microclimate).",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Geographic climate zones (by isothermal lines connecting places with equal mean annual temperature):", size: 22 })] }),
...[
"1. Tropical – all 12 months ≥18°C; minimal seasonal variation; precipitation dominates seasons.",
"2. Subtropical – 8 months ≥10°C; coldest month 2–13°C.",
"3. Moderate (Temperate) – moderate winds and rains; Bulgaria is in the moderate zone.",
"4. Cold (Polar) – every month <10°C; covers >20% of Earth.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Types of Weather", bold: true, size: 26 })] }),
...[
"• Optimal weather – small temperature amplitude over 24 hours (~2°C), sunny days, wind ≤3 m/s.",
"• Irritating weather – one or more factors out of optimal range; wind up to 8 m/s, high temperature amplitude.",
"• Sharp weather – sharp/sudden changes in meteorological factors.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Meteotropic Effects and Diseases", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Meteotropic diseases are those triggered or worsened by changes in meteorological conditions. Organisms adapt well to slow changes but not to sharp ones. Sensitive groups: people with chronic cardiovascular disease, arterial hypertension, neuroses, neuropathies, cerebrovascular disease, arthritis.", size: 22 })] }),
...[
"• Cold air → bronchospasm, spastic bronchial reaction.",
"• Hot weather → heat stroke, increased cardiovascular mortality (peripheral vasodilation → increased central blood pressure).",
"• Rapid temperature drops → changes in blood pH, blood pressure, urinary volume, tissue permeability.",
"• Humidity: Low relative humidity in winter → increased infection frequency. High humidity at high temperature → impaired evaporative cooling.",
"• Barometric pressure changes: Rapid drops associated with increased migraine attacks.",
"• Frontal passages (rapid large weather changes) → profound effects on mortality.",
"• Seasonal: Bronchitis, peptic ulcer, adrenal ulcer, glaucoma, goitre, eczema, herpes zoster relate to seasonal temperature variation.",
"• Weather affects birth rates, sperm counts, outbreaks of pneumonia, influenza, and bronchitis.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Acclimatization", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Acclimatization is the adaptation of the organism to different climate conditions.", size: 22 })] }),
...[
"• Acclimatization to HOT climate: difficult, especially with high humidity. Adaptation period: 12–14 days.",
"• Acclimatization to COLD climate: occurs after ~10 days.",
"• Geographical acclimatization: people moving from cool to subtropical climate often adapt within 2 weeks.",
"• Factors supporting fast acclimatization: healthy nutrition, healthy lifestyle, climate-appropriate clothing, proper microclimate at workplaces and homes.",
"• Population susceptibility: During successive heat waves, excess mortality is lower in the second wave than the first. Reason: (1) weak/susceptible individuals die in early heat waves; (2) survivors become physiologically acclimatised.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Climate Change", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Climate change refers to variation in global/regional climates over time (decades to millions of years). In modern usage: mainly refers to global warming (rising average surface temperatures) due to increased greenhouse gases (CO₂, methane). Health implications: increased heat-wave mortality, spread of vector-borne diseases, changes in food security.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "MCQ Key Points to Remember", bold: true, size: 26, color: "C00000" })] }),
...[
"✔ Bulgaria = moderate (temperate) climatic zone.",
"✔ Acclimatization to hot climate = 12–14 days; cold = ~10 days.",
"✔ Optimal weather: temperature amplitude ~2°C/24h; wind ≤3 m/s.",
"✔ Sharp weather = sudden changes in meteorological factors.",
"✔ Most vulnerable to meteotropic effects: CVD, hypertension, cerebrovascular, arthritis patients.",
"✔ Hot weather extremes cause more mortality than cold wave episodes.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22, italics: true })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Oral Exam Tips", bold: true, size: 26, color: "375623" })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "Distinguish clearly between CLIMATE (long-term) and WEATHER (short-term). When discussing meteotropic diseases, list the vulnerable groups and give specific examples of conditions. For acclimatization, always state the time periods (hot: 12–14 days; cold: 10 days) and supporting measures. If asked about prevention of meteotropic diseases: healthy lifestyle, appropriate seasonal clothing, adequate medication therapy.", size: 22 })] }),
new Paragraph({ children: [new PageBreak()] }),
// ══════════════════════════════════════════════════
// ESSAY 5
// ══════════════════════════════════════════════════
new Paragraph({ heading: HeadingLevel.HEADING_1, spacing: { before: 200, after: 160 }, children: [new TextRun({ text: "Essay 5: Air Pollutants, Smog and Prevention of Air Pollution", bold: true, size: 30, color: "1F4E79" })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Definition of Air Pollution", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "Air pollution is the presence in the ambient (surrounding) atmosphere of substances (gases, mixtures of gases, and particulate matter) generated by human activities in concentrations that interfere with human health, safety or comfort, or that are injurious to vegetation, animals, and other environmental media.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Classification of Air Pollutants", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 60 }, children: [new TextRun({ text: "By origin:", bold: true, size: 22 })] }),
...[
"• PRIMARY pollutants – directly emitted from a source (e.g. CO from vehicle exhaust, SO₂ from factories, ash from volcanoes).",
"• SECONDARY pollutants – not directly emitted; formed by reactions of primary pollutants in the atmosphere (e.g. ground-level ozone from NOₓ + UV light = photochemical smog). Some pollutants are BOTH (e.g. ozone, certain particulates).",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ spacing: { after: 60 }, children: [new TextRun({ text: "By form:", bold: true, size: 22 })] }),
...[
"• Gaseous: CO, SO₂, NOₓ, ozone, volatile organic compounds (VOCs).",
"• Particulate: PM₁₀, PM₂.₅ (fine particles) – suspended solid/liquid particles.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Sources of Air Pollution", bold: true, size: 26 })] }),
...[
"1. TRANSPORT (main urban source): Motor vehicles emit hydrocarbons, CO, lead (Pb), NOₓ, and particulate matter. Responsible for ~2/3 of CO emissions. Strong sunlight converts NOₓ into photochemical (oxidising) pollutants → photochemical smog.",
"2. INDUSTRY: Metal-working (NOₓ, CO, CO₂, Pb, Mn, SO₂); chemical industry (NO₂, CO, CO₂, SO₂, VOCs); power stations (CO, NO₂, SO₂, ammonia, dust).",
"3. DOMESTIC: Combustion of coal = major source of smoke, dust, SO₂, NOₓ. TOBACCO SMOKE = most direct and important source affecting individual health (including passive smokers).",
"4. NATURAL: Volcanic activity (less important than anthropogenic); desert dust; forest fires.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Major Air Pollutants and Health Effects", bold: true, size: 26 })] }),
...[
"• Carbon Monoxide (CO): Colourless, odourless, non-irritating but VERY POISONOUS. Product of incomplete combustion. Binds haemoglobin (250x stronger than O₂) → carboxyhaemoglobin → tissue hypoxia. Major source: vehicles (~2/3 of all CO).",
"• Sulfur Dioxide (SO₂): From coal/petroleum combustion and volcanoes. Oxidises to H₂SO₄ → acid rain. Component of WINTER (acid) smog. Causes acute bronchitis; chronic exposure → chronic bronchitis, lung damage.",
"• Nitrogen Oxides (NOₓ): From high-temperature combustion and vehicles. NO₂ = reddish-brown, sharp odour. Primary concern = ozone precursor. Indoor source: gas cooking appliances.",
"• Ozone (O₃): Strong oxidising agent. Secondary pollutant (no direct anthropogenic source). Formed by photochemical reactions of NOₓ + VOCs + UV. Highest in polluted summer air → photochemical smog. Irritates respiratory tract.",
"• Volatile Organic Compounds (VOCs): Industrial processes, fuel combustion. Carcinogenic risk: benzene = human carcinogen; ethanol, methanol, formaldehyde = animal carcinogens.",
"• Particulate Matter (PM): Fine particles (PM₂.₅, PM₁₀) from burning fossil fuels, vehicles, industry. Penetrate deep into lungs → heart disease, altered lung function, lung cancer.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Smog", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "SMOG = combination of smoke + fog. Two main types:", size: 22 })] }),
...[
"• WINTER (London/Acid) smog: Classic type. Large amounts of coal burning → mixture of smoke + SO₂. Temperature inversion in winter traps pollutants at lower atmospheric levels. Associated with cold, humid conditions.",
"• SUMMER (Photochemical/Los Angeles) smog: Modern type. Originates from vehicle/industrial emissions + UV sunlight → secondary photochemical pollutants (ozone, peroxyacetyl nitrate) + primary emissions. Oxidising in nature. Associated with hot, sunny conditions.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ spacing: { after: 80 }, children: [new TextRun({ text: "TEMPERATURE INVERSION: Normally, lower air layers are warmer and rise, carrying pollutants upward for dispersion. During temperature inversion, lower layers cool rapidly → air cannot rise → pollutants and water vapour are TRAPPED at low levels → smog. More frequent in WINTER.", size: 22 })] }),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Factors Determining Pollutant Concentration", bold: true, size: 26 })] }),
...[
"• Intensity of emissions",
"• Air temperature (temperature inversion)",
"• Direction of wind",
"• Distance from source",
"• Height of chimneys",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Health Effects of Air Pollution", bold: true, size: 26 })] }),
new Paragraph({ spacing: { after: 60 }, children: [new TextRun({ text: "1. Health aspects:", bold: true, size: 22 })] }),
...[
"• Immediate effects: acute bronchitis (respiratory system primarily affected).",
"• Delayed effects: chronic bronchitis, lung cancer, bronchial asthma, respiratory allergies.",
"• Most vulnerable: elderly, children, smokers, people with chronic respiratory disease.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ spacing: { after: 60 }, children: [new TextRun({ text: "2. Social and economic aspects:", bold: true, size: 22 })] }),
...[
"• Destruction of plant and animal life.",
"• Corrosion of metals, damage to buildings.",
"• Reduced visibility in towns.",
"• Chemicals entering the food chain via polluted soil and water.",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Prevention of Air Pollution", bold: true, size: 26 })] }),
...[
"1. PLANNING: Large pollution sources must be located OUTSIDE urban areas according to hygienic requirements. Sanitary protective zones between industrial and residential areas.",
"2. TECHNICAL improvements: Efficient catalytic converters in vehicle exhaust systems; electric filters and technical means for reducing industrial emissions; transition to cleaner fuels and renewable energy.",
"3. AIR POLLUTION MONITORING AND CONTROL: National air monitoring systems (Bulgaria's system is part of the European monitoring system). Standardised measurement equipment and procedures.",
"4. MONITORING OF HUMAN HEALTH: Epidemiological studies; surveillance of risk population groups (children, pregnant women, elderly).",
"5. LEGISLATION: Environmental laws setting maximum permissible concentrations (MPCs) for pollutants.",
].map(t => new Paragraph({ spacing: { after: 80 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22 })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "MCQ Key Points to Remember", bold: true, size: 26, color: "C00000" })] }),
...[
"✔ Winter smog = smoke + SO₂ (acid smog, from coal). Summer smog = photochemical (from vehicles + UV).",
"✔ Temperature inversion = traps pollutants at LOW levels; more common in WINTER.",
"✔ CO = colourless, odourless, non-irritating but VERY poisonous.",
"✔ SO₂ + NO₂ → acid rain (H₂SO₄, HNO₃).",
"✔ Primary pollutant: directly emitted. Secondary: formed in atmosphere (ozone = secondary).",
"✔ Most vulnerable to air pollution: elderly, children, smokers, chronic respiratory patients.",
"✔ What would you expect in a classroom where children had been for a long time? = INCREASED AIR HUMIDITY (from breath + perspiration) and increased CO₂.",
"✔ Benzene = HUMAN carcinogen (not just animal).",
].map(t => new Paragraph({ spacing: { after: 60 }, indent: { left: 360 }, children: [new TextRun({ text: t, size: 22, italics: true })] })),
new Paragraph({ heading: HeadingLevel.HEADING_2, spacing: { before: 160, after: 80 }, children: [new TextRun({ text: "Oral Exam Tips", bold: true, size: 26, color: "375623" })] }),
new Paragraph({ spacing: { after: 120 }, children: [new TextRun({ text: "When discussing air pollutants: always classify (primary vs secondary, gaseous vs particulate) before listing them. Explain temperature inversion clearly as a meteorological phenomenon that worsens smog. For prevention, use the 4-point framework: planning → technical → monitoring (environment) → monitoring (health). Always mention that Bulgaria's monitoring system is integrated into the European monitoring network.", size: 22 })] }),
new Paragraph({ children: [new PageBreak()] }),
// ── QUICK REFERENCE SUMMARY ──
new Paragraph({ heading: HeadingLevel.HEADING_1, spacing: { before: 200, after: 160 }, children: [new TextRun({ text: "Quick Reference: Key Numbers & Facts", bold: true, size: 30, color: "1F4E79" })] }),
...[
["Air Composition", "N₂ = 78.1% | O₂ = 20.9% | CO₂ = 0.03–0.04%"],
["O₂ critical level", "17 vol% = fatigue; 8 vol% = death"],
["CO₂ indoor warning", ">2 vol% = severe breathing difficulty"],
["Relative Humidity Norm", "30–60%"],
["Optimal weather wind", "≤3 m/s; temp amplitude ~2°C/24h"],
["Irritating weather wind", "up to 8 m/s"],
["Acclimatization to heat", "12–14 days"],
["Acclimatization to cold", "~10 days"],
["Nitrogen narcosis depth", ">30 m underwater"],
["Bulgaria climate zone", "Moderate (temperate)"],
["Average annual temp Bulgaria", "11.5°C"],
["IR % of solar radiation", "59%"],
["UV measurement tool", "UV radiometer / Goerz actinometer"],
["Air velocity tool", "Anemometer"],
["Air humidity tool", "Psychrometer"],
["WBGT", "Physical method for complex microclimate evaluation"],
["Benzene", "Human carcinogen (VOC)"],
["Winter smog components", "Smoke + SO₂"],
["Summer smog", "Photochemical; vehicles + UV → ozone, PAN"],
].map(([k, v]) => new Paragraph({
spacing: { after: 60 },
children: [
new TextRun({ text: `${k}: `, bold: true, size: 22 }),
new TextRun({ text: v, size: 22 }),
]
})),
]
}]
});
Packer.toBuffer(doc).then(buffer => {
fs.writeFileSync('/home/daytona/workspace/hygiene-essays/Hygiene_Air_Atmosphere_Essays.docx', buffer);
console.log('SUCCESS: File written.');
});
Running Command
cd /home/daytona/workspace/hygiene-essays && node create_air_essays.js 2>&1
Running Command
python3 /home/daytona/skills/docx/scripts/office/validate.py /home/daytona/works…
Running Command
# Verify the file was created and check its size ls -lh /home/daytona/workspace/…
Your first set of essays is ready! Here's the download link:
Hygiene Air Atmosphere Essays
Word Document · DOCX
The document contains 5 full essays covering Topics 1–5 from your conspectus, structured specifically for your MCQ + oral exam format:
| Essay | Topic | What's Covered |
|---|---|---|
| 1 | Hygiene as a prophylactic science | Definition, aim, 5 tasks, branches, methods |
| 2 | Atmosphere – importance, structure & air composition | 5 layers, exact % of N₂/O₂/CO₂, critical values |
| 3 | Physical factors of the atmosphere | Pressure (decompression sickness, altitude sickness), temperature, humidity (30–60%), air velocity, UV/IR/visible radiation, air ionisation |
| 4 | Climate, weather, meteotropic diseases & acclimatization | Climate types, weather types, vulnerable groups, acclimatization times (hot = 12–14 days, cold = 10 days) |
| 5 | Air pollutants, smog & prevention | Primary vs secondary, CO/SO₂/NOₓ/ozone/VOCs, winter vs summer smog, temperature inversion, 4-point prevention framework |
Each essay has three sections:
- Main essay – oral exam ready, written in full paragraphs
- MCQ Key Points (in red) – direct answers for true/false and multiple choice questions, including ones that appeared in the 2026 exam
- Oral Exam Tips (in green) – what to say first, values to memorise, how to structure your answer
Ready to move on to Water (Topics 6–9) whenever you are!
Also need MCQS in all these topics
Writing File
~/hygiene-essays/create_mcqs.js
const { Document, Packer, Paragraph, TextRun, HeadingLevel, AlignmentType, PageBreak, ShadingType } = require('docx');
const fs = require('fs');
// Helper: question paragraph
function Q(num, text) {
return new Paragraph({
spacing: { before: 180, after: 60 },
children: [new TextRun({ text: `Q${num}. ${text}`, bold: true, size: 22, font: "Calibri" })]
});
}
// Helper: option paragraph
function Opt(letter, text, correct) {
return new Paragraph({
spacing: { after: 40 },
indent: { left: 360 },
children: [
new TextRun({ text: `${letter}) ${text}`, size: 22, font: "Calibri",
bold: correct ? true : false,
color: correct ? "375623" : "000000"
})
]
});
}
// Helper: answer line
function Ans(text) {
return new Paragraph({
spacing: { after: 80 },
indent: { left: 360 },
children: [
new TextRun({ text: `✔ Answer: ${text}`, size: 21, font: "Calibri", italics: true, color: "1F4E79" })
]
});
}
// Helper: TF question
function TF(num, text, answer, explanation) {
return [
new Paragraph({
spacing: { before: 180, after: 60 },
children: [new TextRun({ text: `Q${num}. TRUE or FALSE: ${text}`, bold: true, size: 22, font: "Calibri" })]
}),
new Paragraph({
spacing: { after: 80 },
indent: { left: 360 },
children: [
new TextRun({ text: `✔ Answer: ${answer}. `, size: 21, font: "Calibri", bold: true, color: "375623" }),
new TextRun({ text: explanation, size: 21, font: "Calibri", italics: true, color: "1F4E79" })
]
})
];
}
function sectionHead(text) {
return new Paragraph({
heading: HeadingLevel.HEADING_2,
spacing: { before: 240, after: 120 },
children: [new TextRun({ text, bold: true, size: 26, font: "Calibri", color: "1F4E79" })]
});
}
function topicHead(text) {
return new Paragraph({
heading: HeadingLevel.HEADING_1,
spacing: { before: 300, after: 160 },
children: [new TextRun({ text, bold: true, size: 30, font: "Calibri", color: "1F4E79" })]
});
}
function note(text) {
return new Paragraph({
spacing: { after: 80 },
indent: { left: 360 },
children: [new TextRun({ text, size: 20, font: "Calibri", italics: true, color: "595959" })]
});
}
const doc = new Document({
sections: [{
properties: {},
children: [
// ── TITLE ──
new Paragraph({
alignment: AlignmentType.CENTER,
spacing: { before: 300, after: 200 },
children: [new TextRun({ text: "HYGIENE & ECOLOGY – MCQ PRACTICE BANK", bold: true, size: 36, font: "Calibri" })]
}),
new Paragraph({
alignment: AlignmentType.CENTER,
spacing: { after: 100 },
children: [new TextRun({ text: "Topics 1–5: Hygiene Science | Atmosphere | Physical Factors | Climate & Weather | Air Pollution", size: 22, italics: true, font: "Calibri" })]
}),
new Paragraph({
alignment: AlignmentType.CENTER,
spacing: { after: 400 },
children: [new TextRun({ text: "Medical University Plovdiv | 3rd Year, VI Semester | 2025–2026", size: 22, font: "Calibri" })]
}),
note("Format: Single best answer (A–D) + True/False. Correct answers are shown in GREEN with explanations."),
new Paragraph({ children: [new PageBreak()] }),
// ════════════════════════════════════════
// TOPIC 1 – HYGIENE AS A SCIENCE
// ════════════════════════════════════════
topicHead("TOPIC 1 – Hygiene as a Main Prophylactic Medical Science"),
sectionHead("Single Best Answer"),
Q(1, "What is the PRIMARY purpose of hygiene as a medical science?"),
Opt("A", "Treatment of communicable diseases", false),
Opt("B", "Preservation of health and prevention of disease", true),
Opt("C", "Surgical interventions in emergency settings", false),
Opt("D", "Rehabilitation of patients after illness", false),
Ans("B – Hygiene is the principal PROPHYLACTIC (preventive) science, not therapeutic."),
Q(2, "Which of the following is a correct definition of a hygienic norm?"),
Opt("A", "The maximum dose of medication allowed per day", false),
Opt("B", "The optimal concentration of a nutrient in food", false),
Opt("C", "Maximum Permissible Concentration (MPC) of a harmful substance in the environment", true),
Opt("D", "The minimum recommended daily exercise duration", false),
Ans("C – Hygienic norms define MPCs for harmful substances in air, water, food, soil."),
Q(3, "Which body carries out state sanitary control in Bulgaria?"),
Opt("A", "Ministry of Agriculture", false),
Opt("B", "National Centre for Public Health", false),
Opt("C", "Regional Health Inspectorate (RHI)", true),
Opt("D", "Municipal Council", false),
Ans("C – State sanitary control is carried out by the Regional Health Inspectorate."),
Q(4, "Which of the following is NOT a method used in hygiene?"),
Opt("A", "Epidemiological method", false),
Opt("B", "Laboratory chemical analysis", false),
Opt("C", "Surgical intervention", true),
Opt("D", "Statistical analysis of health data", false),
Ans("C – Surgery is a clinical (therapeutic) method, not a hygienic method."),
Q(5, "Which branch of hygiene deals with working conditions and occupational hazards?"),
Opt("A", "Communal hygiene", false),
Opt("B", "Childhood and adolescent hygiene", false),
Opt("C", "Nutritional hygiene", false),
Opt("D", "Occupational (labour) hygiene", true),
Ans("D – Occupational hygiene focuses on work conditions, hazards, and prevention of occupational diseases."),
Q(6, "The word 'hygiene' is derived from:"),
Opt("A", "Latin 'hygiena' meaning cleanliness", false),
Opt("B", "Greek 'hygienos' meaning healthy", true),
Opt("C", "Arabic 'haj' meaning pilgrimage", false),
Opt("D", "French 'hygiène' meaning order", false),
Ans("B – Hygiene derives from Greek 'hygienos' (healthy), named after Hygieia, Greek goddess of health."),
sectionHead("True / False"),
...TF(7, "Hygiene is a therapeutic science focused on curing diseases.", "FALSE", "Hygiene is PROPHYLACTIC (preventive), not therapeutic. It aims to prevent disease, not treat it."),
...TF(8, "The epidemiological method is one of the main methods used in hygiene.", "TRUE", "Epidemiological studies of disease distribution and determinants are a core hygiene method."),
...TF(9, "Hygienic norms are only applicable to air quality.", "FALSE", "Hygienic norms (MPCs) apply to air, water, soil, food, workplace environments, and radiation."),
...TF(10, "Medical ecology studies the mutual relationship between organisms and the environment.", "TRUE", "Medical ecology is closely related to hygiene and studies organism-environment interactions."),
new Paragraph({ children: [new PageBreak()] }),
// ════════════════════════════════════════
// TOPIC 2 – ATMOSPHERE
// ════════════════════════════════════════
topicHead("TOPIC 2 – Atmosphere: Importance, Structure and Air Composition"),
sectionHead("Single Best Answer"),
Q(11, "What percentage of atmospheric air is found in the troposphere?"),
Opt("A", "50%", false),
Opt("B", "60%", false),
Opt("C", "80%", true),
Opt("D", "95%", false),
Ans("C – The troposphere contains approximately 80% of atmospheric air mass."),
Q(12, "Which atmospheric layer is of PRIMARY hygienic importance?"),
Opt("A", "Stratosphere", false),
Opt("B", "Troposphere", true),
Opt("C", "Mesosphere", false),
Opt("D", "Thermosphere", false),
Ans("B – The troposphere (0–10 km) is where we breathe, weather occurs, and air pollution takes place."),
Q(13, "Air is correctly described as:"),
Opt("A", "A chemical compound of gases", false),
Opt("B", "A homogeneous solution of gases", false),
Opt("C", "A mechanical mixture of gases", true),
Opt("D", "A colloid suspension of gases", false),
Ans("C – Air is a MECHANICAL mixture, not a chemical compound."),
Q(14, "What is the normal percentage of oxygen in atmospheric air?"),
Opt("A", "17.0%", false),
Opt("B", "20.9%", true),
Opt("C", "78.1%", false),
Opt("D", "0.04%", false),
Ans("B – O₂ = 20.9%. N₂ = 78.1%, CO₂ = 0.03–0.04%."),
Q(15, "At what oxygen concentration does the feeling of fatigue and discomfort begin in a room?"),
Opt("A", "20%", false),
Opt("B", "17%", true),
Opt("C", "12%", false),
Opt("D", "8%", false),
Ans("B – 17 vol% O₂ is the critical hygiene concentration where fatigue and discomfort begin."),
Q(16, "Death from oxygen deficiency occurs when O₂ concentration falls to:"),
Opt("A", "17 vol%", false),
Opt("B", "12 vol%", false),
Opt("C", "10 vol%", false),
Opt("D", "8 vol%", true),
Ans("D – At 8 vol% O₂, death follows."),
Q(17, "CO₂ concentration in outdoor atmospheric air is approximately:"),
Opt("A", "0.003–0.004%", false),
Opt("B", "0.03–0.04%", true),
Opt("C", "0.3–0.4%", false),
Opt("D", "3–4%", false),
Ans("B – CO₂ in outdoor air = 0.03–0.04 vol%."),
Q(18, "CO₂ concentration in a closed room is used as an indicator of:"),
Opt("A", "Fire risk", false),
Opt("B", "Air quality and ventilation adequacy", true),
Opt("C", "Humidity level", false),
Opt("D", "Bacterial contamination", false),
Ans("B – CO₂ increases in poorly ventilated spaces and is the standard marker for air quality assessment."),
Q(19, "At what indoor CO₂ concentration does severe difficulty in breathing occur?"),
Opt("A", "0.1 vol%", false),
Opt("B", "0.5 vol%", false),
Opt("C", "2 vol%", true),
Opt("D", "5 vol%", false),
Ans("C – CO₂ >2 vol% causes severe difficulty in breathing."),
Q(20, "Which naturally occurring radioactive gas can accumulate indoors and increase lung cancer risk?"),
Opt("A", "Argon", false),
Opt("B", "Krypton", false),
Opt("C", "Radon", true),
Opt("D", "Neon", false),
Ans("C – Radon (Rn) is a naturally radioactive gas that seeps from soil/building materials and accumulates in poorly ventilated indoor spaces."),
Q(21, "Which atmospheric layer contains the ozone layer that protects against UV radiation?"),
Opt("A", "Troposphere", false),
Opt("B", "Stratosphere", true),
Opt("C", "Mesosphere", false),
Opt("D", "Thermosphere", false),
Ans("B – The stratosphere (10–50 km) contains the ozone layer."),
Q(22, "Which group of patients is MOST sensitive to oxygen deficiency in indoor air?"),
Opt("A", "Young athletes", false),
Opt("B", "Healthy adults", false),
Opt("C", "Patients with anaemia, CVD or lung disease", true),
Opt("D", "Pregnant women only", false),
Ans("C – Patients with anaemia, cardiovascular disease, or lung disease are most sensitive to O₂ deficiency."),
sectionHead("True / False"),
...TF(23, "Air is a chemical compound of nitrogen and oxygen.", "FALSE", "Air is a MECHANICAL MIXTURE of gases, not a chemical compound."),
...TF(24, "Nitrogen at normal atmospheric pressure affects physiological functions.", "FALSE", "At normal pressure, N₂ has no physiological effect; it serves only to dilute oxygen."),
...TF(25, "CO₂ in expired air increases compared to inspired air.", "TRUE", "Expired air contains more CO₂ than inspired air because CO₂ is a product of cellular metabolism."),
...TF(26, "When hygienists refer to 'the atmosphere' they primarily mean the troposphere.", "TRUE", "The troposphere is the layer of immediate hygienic relevance for health and air quality."),
new Paragraph({ children: [new PageBreak()] }),
// ════════════════════════════════════════
// TOPIC 3 – PHYSICAL FACTORS
// ════════════════════════════════════════
topicHead("TOPIC 3 – Hygiene Characteristics of Physical Factors of the Atmosphere"),
sectionHead("Single Best Answer"),
Q(27, "What instrument is used to measure AIR VELOCITY?"),
Opt("A", "Psychrometer", false),
Opt("B", "Barometer", false),
Opt("C", "Anemometer", true),
Opt("D", "Actinometer", false),
Ans("C – An anemometer measures air velocity/speed."),
Q(28, "What instrument is used to measure AIR HUMIDITY?"),
Opt("A", "Thermometer", false),
Opt("B", "Anemometer", false),
Opt("C", "Psychrometer", true),
Opt("D", "Barometer", false),
Ans("C – A psychrometer (also: hygrometer) measures air humidity. MCQ term from 2026 exam."),
Q(29, "What is the hygienic norm for relative air humidity?"),
Opt("A", "10–20%", false),
Opt("B", "30–60%", true),
Opt("C", "50–80%", false),
Opt("D", "60–90%", false),
Ans("B – The hygienic norm for relative humidity is 30–60%."),
Q(30, "Nitrogen narcosis occurs in divers at depths greater than:"),
Opt("A", "10 m", false),
Opt("B", "20 m", false),
Opt("C", "30 m", true),
Opt("D", "50 m", false),
Ans("C – Nitrogen narcosis occurs at depths >30 m. Prevented by using helium-nitrogen mixtures."),
Q(31, "Decompression sickness is caused by:"),
Opt("A", "Excess oxygen absorption during diving", false),
Opt("B", "Rapid decompression causing nitrogen bubble formation in blood and tissues", true),
Opt("C", "Ear barotrauma from pressure changes", false),
Opt("D", "Carbon dioxide accumulation in the lungs", false),
Ans("B – Rapid decompression allows dissolved N₂ to come out of solution forming bubbles → emboli."),
Q(32, "What is the temperature of dew point?"),
Opt("A", "The temperature at which water freezes", false),
Opt("B", "The temperature at which air becomes saturated with water vapour and condensation begins", true),
Opt("C", "The normal body temperature", false),
Opt("D", "The temperature at which air humidity reaches 30%", false),
Ans("B – Dew point is the temperature at which air becomes saturated and condensation (dew) forms."),
Q(33, "Which physical index is used for OBJECTIVE (physical) complex microclimate evaluation?"),
Opt("A", "BMI index", false),
Opt("B", "WBGT (Wet Bulb Globe Temperature) index", true),
Opt("C", "Body Surface Area index", false),
Opt("D", "Ventilation rate K", false),
Ans("B – WBGT index is the physical method for complex microclimate evaluation. (From 2026 MCQ bank.)"),
Q(34, "What percentage of solar radiation reaching Earth's surface is infrared radiation?"),
Opt("A", "20%", false),
Opt("B", "40%", false),
Opt("C", "59%", true),
Opt("D", "75%", false),
Ans("C – Infrared (IR) radiation accounts for 59% of solar radiation at Earth's surface."),
Q(35, "Which of the following statements about UV radiation is CORRECT?"),
Opt("A", "UV radiation can be seen but not felt", false),
Opt("B", "UV radiation can be both seen and felt", false),
Opt("C", "UV radiation cannot be seen or felt", true),
Opt("D", "UV radiation can be felt as heat but not seen", false),
Ans("C – UV radiation is invisible AND cannot be felt (heat is felt from IR, not UV). This was a 2026 MCQ – 'You can't see UV but you can feel it = FALSE.'"),
Q(36, "Long-wave UV radiation causes which of the following health effects?"),
Opt("A", "Bactericidal effect", false),
Opt("B", "Anti-rickets (Vitamin D synthesis) effect", false),
Opt("C", "Cataracts, retinal damage, skin erythema, and skin cancer", true),
Opt("D", "Stimulation of protein metabolism only", false),
Ans("C – Long UV waves → cataracts (cumulative), retinal damage, sunburn, skin cancer. Short UV = bactericidal; middle UV = anti-rickets."),
Q(37, "Where do negative air ions predominate?"),
Opt("A", "In industrial indoor workplaces", false),
Opt("B", "In urban polluted areas", false),
Opt("C", "In mountains, forests, near the sea and waterfalls", true),
Opt("D", "In hospital operating rooms", false),
Ans("C – Negative air ions predominate in clean-air environments and have favourable health effects. Positive ions increase in polluted/indoor air."),
Q(38, "Which of the following is a health effect of INCREASED atmospheric pressure?"),
Opt("A", "Acute mountain sickness", false),
Opt("B", "High-altitude pulmonary oedema", false),
Opt("C", "Ear barotrauma (barotitis)", true),
Opt("D", "Diminished ambient oxygen pressure", false),
Ans("C – Ear barotrauma occurs with increased pressure (diving/caissons). Altitude sickness occurs with decreased pressure."),
Q(39, "Air temperature is MAINLY heated by:"),
Opt("A", "Direct solar radiation (approximately 60%)", false),
Opt("B", "Infrared radiation from the ground", true),
Opt("C", "Chemical reactions in the troposphere", false),
Opt("D", "Direct solar radiation accounts for ~50%", false),
Ans("B – Air is heated mainly by IR radiation from the ground surface. Direct sun heating of air = only ~0.02%."),
Q(40, "What are the two MAIN groups of physical factors of the atmosphere?"),
Opt("A", "Chemical and biological factors", false),
Opt("B", "Meteorological factors and space-origin (solar) factors", true),
Opt("C", "Indoor and outdoor factors", false),
Opt("D", "Physical and chemical factors", false),
Ans("B – Group 1: Meteorological (pressure, temperature, humidity, velocity, electricity, ionisation). Group 2: Space-origin (solar radiation, heliomagnetic)."),
sectionHead("True / False"),
...TF(41, "Psychrometry is used to measure air humidity.", "TRUE", "Psychrometer measures air humidity via wet and dry bulb thermometers."),
...TF(42, "High relative humidity at high air temperature promotes effective cooling by sweat evaporation.", "FALSE", "High humidity IMPAIRS evaporation of sweat → heat accumulates → risk of heat stroke."),
...TF(43, "Infrared radiation can penetrate the skin and cause heating.", "TRUE", "IR penetrates skin → heating; chronic exposure → cataract and retinal damage."),
...TF(44, "Nitrogen narcosis can be prevented by breathing helium-depleted nitrogen mixtures.", "TRUE", "Replacing N₂ with helium in breathing mixtures prevents nitrogen narcosis at depth."),
...TF(45, "What would you expect in a classroom after children have been present for a long time? Increased air humidity.", "TRUE", "Children exhale water vapour and perspire, increasing air humidity. CO₂ also increases."),
new Paragraph({ children: [new PageBreak()] }),
// ════════════════════════════════════════
// TOPIC 4 – CLIMATE & WEATHER
// ════════════════════════════════════════
topicHead("TOPIC 4 – Climate, Weather, Meteotropic Diseases and Acclimatization"),
sectionHead("Single Best Answer"),
Q(46, "Climate is defined as:"),
Opt("A", "Daily variations in meteorological conditions", false),
Opt("B", "The short-term dynamic complex of meteorological factors for a given place", false),
Opt("C", "The long-term weather regime specific to a given territory", true),
Opt("D", "The atmospheric pressure at a given altitude", false),
Ans("C – Climate = long-term; weather = short-term."),
Q(47, "Bulgaria is located in which climatic zone?"),
Opt("A", "Tropical", false),
Opt("B", "Subtropical", false),
Opt("C", "Moderate (temperate)", true),
Opt("D", "Cold (polar)", false),
Ans("C – Bulgaria is in the moderate (temperate) climatic zone."),
Q(48, "How long does acclimatization to a HOT climate typically take?"),
Opt("A", "1–3 days", false),
Opt("B", "5–7 days", false),
Opt("C", "12–14 days", true),
Opt("D", "4–6 weeks", false),
Ans("C – Acclimatization to hot (especially humid) climate takes 12–14 days."),
Q(49, "How long does acclimatization to COLD climate typically take?"),
Opt("A", "3–5 days", false),
Opt("B", "~10 days", true),
Opt("C", "12–14 days", false),
Opt("D", "3–4 weeks", false),
Ans("B – Acclimatization to cold climate occurs in approximately 10 days."),
Q(50, "Which of the following characterises OPTIMAL weather?"),
Opt("A", "Temperature amplitude >10°C/24h and wind >8 m/s", false),
Opt("B", "Temperature amplitude ~2°C/24h and wind ≤3 m/s", true),
Opt("C", "Sharp sudden changes in meteorological factors", false),
Opt("D", "High humidity with foggy conditions", false),
Ans("B – Optimal weather: ~2°C temperature amplitude per 24 hours, sunny, wind ≤3 m/s."),
Q(51, "Which type of weather involves sharp/sudden changes in meteorological factors?"),
Opt("A", "Optimal weather", false),
Opt("B", "Irritating weather", false),
Opt("C", "Sharp weather", true),
Opt("D", "Moderate weather", false),
Ans("C – Sharp weather involves sudden/rapid changes in meteorological conditions."),
Q(52, "Which patients are MOST sensitive to sharp changes in meteorological conditions?"),
Opt("A", "Healthy young adults and athletes", false),
Opt("B", "Patients with CVD, hypertension, cerebrovascular disease, and arthritis", true),
Opt("C", "Patients with diabetes mellitus only", false),
Opt("D", "Patients with skin conditions only", false),
Ans("B – Chronic cardiovascular disease, arterial hypertension, cerebrovascular disease, neuroses, neuropathies, and arthritis make patients more sensitive to meteotropic effects."),
Q(53, "Which temperature extreme has a MORE substantial impact on mortality?"),
Opt("A", "Cold wave episodes", false),
Opt("B", "Hot weather extremes", true),
Opt("C", "Both are equal", false),
Opt("D", "Neither has significant impact", false),
Ans("B – Hot weather extremes appear to have a more substantial impact on mortality than cold wave episodes."),
Q(54, "Why is excess mortality during the SECOND heat wave of a year lower than the first?"),
Opt("A", "Air conditioning use increases", false),
Opt("B", "Susceptible individuals died in the first wave; survivors become physiologically acclimatised", true),
Opt("C", "Second heat waves are always cooler", false),
Opt("D", "Government interventions improve", false),
Ans("B – Two mechanisms: (1) susceptible population depleted after first wave; (2) survivors physiologically acclimatise."),
Q(55, "Rapid drops in barometric pressure are associated with increased frequency of:"),
Opt("A", "Diabetes attacks", false),
Opt("B", "Migraine attacks", true),
Opt("C", "Cardiac arrhythmias only", false),
Opt("D", "Peptic ulcer haemorrhage", false),
Ans("B – Studies show increased migraine attacks with rapid barometric pressure changes."),
Q(56, "Which of the following describes MESOCLIMATE?"),
Opt("A", "Climate of a broad geographic zone", false),
Opt("B", "Climate of small areas not representative of the broader district climate", true),
Opt("C", "Climate within a closed room", false),
Opt("D", "Climate of the stratosphere", false),
Ans("B – Mesoclimate = climate of small surface areas, which may not be representative of the district."),
sectionHead("True / False"),
...TF(57, "Weather is a long-term dynamic complex of meteorological factors.", "FALSE", "Weather is SHORT-term. CLIMATE is the long-term regime."),
...TF(58, "Acclimatization to hot climate is more difficult than to cold climate.", "TRUE", "Hot (especially humid) climate is harder to acclimatise to (12–14 days vs ~10 days for cold)."),
...TF(59, "Frontal passages (rapid large weather changes) can have a profound impact on mortality.", "TRUE", "Rapid variations in weather conditions during frontal passages can cause significant physiological stress."),
...TF(60, "Cold air can cause bronchospasm (spastic bronchial reaction).", "TRUE", "Cold air can trigger bronchoconstriction, particularly in asthmatic and sensitive individuals."),
new Paragraph({ children: [new PageBreak()] }),
// ════════════════════════════════════════
// TOPIC 5 – AIR POLLUTION & SMOG
// ════════════════════════════════════════
topicHead("TOPIC 5 – Air Pollutants, Smog and Prevention of Air Pollution"),
sectionHead("Single Best Answer"),
Q(61, "Primary air pollutants are:"),
Opt("A", "Pollutants formed in the atmosphere by chemical reactions between other pollutants", false),
Opt("B", "Pollutants directly emitted from a source", true),
Opt("C", "Only natural pollutants from volcanoes", false),
Opt("D", "Pollutants found only in water and soil", false),
Ans("B – PRIMARY pollutants are DIRECTLY emitted (e.g. CO from vehicles, SO₂ from factories). SECONDARY pollutants form in the atmosphere."),
Q(62, "Ground-level ozone is an example of:"),
Opt("A", "A primary pollutant", false),
Opt("B", "A secondary pollutant", true),
Opt("C", "A natural non-anthropogenic pollutant", false),
Opt("D", "A particulate matter pollutant", false),
Ans("B – Ground-level ozone is a SECONDARY pollutant formed by photochemical reactions between NOₓ, VOCs, and UV sunlight."),
Q(63, "Which is the MAJOR source of air pollution in urban areas?"),
Opt("A", "Domestic coal burning", false),
Opt("B", "Motor vehicles (transport)", true),
Opt("C", "Volcanic activity", false),
Opt("D", "Agricultural activity", false),
Ans("B – Motor vehicles are the MAJOR source of air pollution in urban areas, emitting CO, NOₓ, hydrocarbons, Pb, and particulates."),
Q(64, "Approximately what fraction of all CO emissions comes from motor vehicles?"),
Opt("A", "1/4", false),
Opt("B", "1/3", false),
Opt("C", "2/3", true),
Opt("D", "Nearly all", false),
Ans("C – About 2/3 of all CO emissions come from motor vehicles."),
Q(65, "WINTER (London) smog is characterised by:"),
Opt("A", "Vehicle + UV light → ozone + PAN", false),
Opt("B", "Smoke + SO₂; acidic nature; temperature inversion in cold/humid conditions", true),
Opt("C", "Predominantly photochemical oxidising reactions", false),
Opt("D", "Only found in tropical regions", false),
Ans("B – Winter smog = smoke + SO₂ (from coal combustion); acid smog; associated with cold humid weather and temperature inversion."),
Q(66, "SUMMER (photochemical) smog is formed by:"),
Opt("A", "Burning of coal and biomass", false),
Opt("B", "Industrial SO₂ emissions during fog", false),
Opt("C", "Vehicle/industrial emissions + UV sunlight → secondary oxidising pollutants (ozone, PAN)", true),
Opt("D", "Water vapour reacting with nitrogen", false),
Ans("C – Summer/photochemical smog forms when NOₓ and VOCs from vehicles/industry react with UV → ozone and peroxyacetyl nitrate (PAN)."),
Q(67, "Temperature inversion is a meteorological phenomenon that:"),
Opt("A", "Disperses pollutants to higher altitudes", false),
Opt("B", "Traps pollutants at lower atmospheric levels preventing upward diffusion", true),
Opt("C", "Occurs only in tropical regions", false),
Opt("D", "Reduces the concentration of pollutants in cities", false),
Ans("B – In temperature inversion, lower air layers cool rapidly → cannot rise → pollutants and water vapour trapped at low levels → smog. More frequent in WINTER."),
Q(68, "Carbon monoxide (CO) is correctly described as:"),
Opt("A", "Reddish-brown, sharp-smelling gas", false),
Opt("B", "Colourless, odourless, non-irritating but very poisonous gas", true),
Opt("C", "Colourless gas with a characteristic sharp taste", false),
Opt("D", "Yellow gas with a pungent odour", false),
Ans("B – CO is colourless, odourless, and non-irritating, which makes it especially dangerous (no warning signs). It is very poisonous."),
Q(69, "SO₂ further oxidises in the presence of NO₂ to form:"),
Opt("A", "Ozone (O₃)", false),
Opt("B", "Carbon monoxide", false),
Opt("C", "Sulphuric acid (H₂SO₄) → acid rain", true),
Opt("D", "Nitric acid only", false),
Ans("C – SO₂ + H₂O + NO₂ (catalyst) → H₂SO₄ → acid rain. This damages ecosystems and buildings."),
Q(70, "Which of the following is classified as a HUMAN carcinogen among air pollutants?"),
Opt("A", "Formaldehyde", false),
Opt("B", "Acetaldehyde", false),
Opt("C", "Benzene", true),
Opt("D", "Ethanol vapour", false),
Ans("C – Benzene is a confirmed HUMAN carcinogen. Formaldehyde and acetaldehyde are animal carcinogens."),
Q(71, "Which group is MOST vulnerable to the health effects of air pollution?"),
Opt("A", "Healthy middle-aged adults", false),
Opt("B", "Elderly, children, smokers, and those with chronic respiratory disease", true),
Opt("C", "Athletes with high lung capacity", false),
Opt("D", "People living in urban areas only", false),
Ans("B – The most vulnerable groups to air pollution are: elderly, children, smokers, and people with chronic respiratory difficulties."),
Q(72, "The most important INDOOR source of air pollution affecting individual health is:"),
Opt("A", "Radon from building materials", false),
Opt("B", "Formaldehyde from furniture", false),
Opt("C", "Tobacco smoke (including passive smoking)", true),
Opt("D", "CO₂ from human respiration", false),
Ans("C – Tobacco smoke is described as the most direct and important indoor air pollution source; passive smokers are also affected."),
Q(73, "Which of the following is a PRIMARY prevention measure against air pollution?"),
Opt("A", "Treating patients with bronchitis", false),
Opt("B", "Locating large pollution sources outside urban areas during planning", true),
Opt("C", "Distributing gas masks to the population", false),
Opt("D", "Building taller buildings to avoid ground-level pollution", false),
Ans("B – Planning (locating industry outside residential zones) is the primary prevention measure."),
Q(74, "The immediate health effect of air pollution on the respiratory system is:"),
Opt("A", "Lung cancer", false),
Opt("B", "Chronic bronchitis", false),
Opt("C", "Acute bronchitis", true),
Opt("D", "Pulmonary fibrosis", false),
Ans("C – The IMMEDIATE effect is acute bronchitis. Delayed/chronic effects include chronic bronchitis, lung cancer, asthma, and allergies."),
Q(75, "Bulgaria's air monitoring system is:"),
Opt("A", "Completely independent with no international links", false),
Opt("B", "Part of the European monitoring system", true),
Opt("C", "Managed solely by local municipalities", false),
Opt("D", "Based on voluntary reporting by industries", false),
Ans("B – The Bulgarian national air monitoring system is integrated into the European monitoring system."),
sectionHead("True / False"),
...TF(76, "Artificial ventilation can be exhaust, plenum (supply), and balanced.", "TRUE", "This was a direct 2026 MCQ. Artificial ventilation types: exhaust (extraction), plenum (supply/push), and balanced (both)."),
...TF(77, "Temperature inversion is more frequent in summer than in winter.", "FALSE", "Temperature inversion is MORE FREQUENT IN WINTER, which is why winter smog episodes are more common."),
...TF(78, "Particulate matter (PM₂.₅) is associated with increased risk of heart disease and lung cancer.", "TRUE", "Fine particles penetrate deep into the lungs and are linked to heart disease, altered lung function, and lung cancer."),
...TF(79, "Natural sources of air pollution (volcanic activity, desert dust) are more significant than anthropogenic sources.", "FALSE", "Natural sources have LESS importance compared to human-activity sources (transport, industry, domestic combustion)."),
...TF(80, "Decreased SO₂ emissions from motor vehicles have been achieved through catalytic converters.", "FALSE", "Catalytic converters reduce CO and NOₓ; SO₂ reduction is mainly achieved by reducing sulfur content in fuels and industrial controls. The text states CO diminution from catalytic converters."),
new Paragraph({ children: [new PageBreak()] }),
// ── ANSWER KEY SUMMARY ──
new Paragraph({ heading: HeadingLevel.HEADING_1, spacing: { before: 200, after: 160 }, children: [new TextRun({ text: "Quick Answer Key", bold: true, size: 30, font: "Calibri", color: "1F4E79" })] }),
note("For verification. All correct answers with topic reference."),
...[
"Q1:B Q2:C Q3:C Q4:C Q5:D Q6:B Q7:FALSE Q8:TRUE Q9:FALSE Q10:TRUE",
"Q11:C Q12:B Q13:C Q14:B Q15:B Q16:D Q17:B Q18:B Q19:C Q20:C",
"Q21:B Q22:C Q23:FALSE Q24:FALSE Q25:TRUE Q26:TRUE",
"Q27:C Q28:C Q29:B Q30:C Q31:B Q32:B Q33:B Q34:C Q35:C Q36:C",
"Q37:C Q38:C Q39:B Q40:B Q41:TRUE Q42:FALSE Q43:TRUE Q44:TRUE Q45:TRUE",
"Q46:C Q47:C Q48:C Q49:B Q50:B Q51:C Q52:B Q53:B Q54:B Q55:B",
"Q56:B Q57:FALSE Q58:TRUE Q59:TRUE Q60:TRUE",
"Q61:B Q62:B Q63:B Q64:C Q65:B Q66:C Q67:B Q68:B Q69:C Q70:C",
"Q71:B Q72:C Q73:B Q74:C Q75:B Q76:TRUE Q77:FALSE Q78:TRUE Q79:FALSE Q80:FALSE",
].map(line => new Paragraph({
spacing: { after: 60 },
children: [new TextRun({ text: line, size: 20, font: "Courier New" })]
})),
]
}]
});
Packer.toBuffer(doc).then(buffer => {
fs.writeFileSync('/home/daytona/workspace/hygiene-essays/Hygiene_Air_Topics_MCQs.docx', buffer);
console.log('SUCCESS: MCQ file written.');
});
Running Command
cd /home/daytona/workspace/hygiene-essays && node create_mcqs.js 2>&1
Running Command
python3 -c " from zipfile import ZipFile with ZipFile('/home/daytona/workspace/h…
Your MCQ bank is ready!
Hygiene Air Topics MCQs
Word Document · DOCX
Here's what's inside - 80 questions across all 5 topics:
| Topic | Single Best Answer | True/False | Total |
|---|---|---|---|
| 1 - Hygiene as a Science | Q1–Q6 | Q7–Q10 | 10 |
| 2 - Atmosphere & Air Composition | Q11–Q22 | Q23–Q26 | 16 |
| 3 - Physical Factors | Q27–Q40 | Q41–Q45 | 19 |
| 4 - Climate, Weather & Acclimatization | Q46–Q56 | Q57–Q60 | 15 |
| 5 - Air Pollution & Smog | Q61–Q75 | Q76–Q80 | 20 |
Features:
- Correct answers are highlighted in green with full explanations
- Questions marked with "2026 MCQ" are pulled directly from your past exam document (e.g. psychrometry, WBGT, UV sensation, classroom humidity, artificial ventilation types)
- Ends with a compact Answer Key for quick self-testing
- Includes exact values professors ask about (O₂ = 17% fatigue / 8% death, CO₂ = 0.03–0.04%, humidity norm = 30–60%, acclimatization times, etc.)
Ready to move on to Water (Topics 6–9) with essays + MCQs when you are!
This is a shared conversation. Sign in to Orris to start your own chat.