Occupational Health Practice Questions

Q: Which one of the following is the most common initial symptom of byssinosis?

Chest tightness. **Explanation:** **Byssinosis**, also known as "Monday Fever" or "Brown Lung Disease," is an occupational lung disease caused by the inhalation of cotton, flax, hemp, or jute dust. It is a classic high-yield topic in Community Medicine. **1. Why "Chest Tightness" is correct:** The hallmark clinical feature of byssinosis is **chest tightness**, which typically occurs on the **first day of the work week** (Monday) after a weekend break. This is due to the release of histamine or other mediators triggered by the endotoxins present in the cotton bracts. As the disease progresses, the symptoms may extend to subsequent days of the week, but the initial and most characteristic presentation remains acute chest tightness. **2. Why other options are incorrect:** * **Wheezing:** While wheezing can occur in advanced stages or in individuals with underlying reactive airway disease, it is not the primary or most common initial symptom. * **Cough:** Cough may be present as a secondary symptom, but it lacks the diagnostic specificity of the "Monday morning" chest tightness. * **Haemoptysis:** This is not a feature of byssinosis. Its presence should prompt an investigation for other conditions like Tuberculosis, Bronchiectasis, or Malignancy. **3. High-Yield Clinical Pearls for NEET-PG:** * **Schilling’s Classification:** Used to grade Byssinosis (Grade ½: Occasional chest tightness on the first day of the week; Grade 1: Chest tightness every Monday; Grade 2: Chest tightness on Monday and other days). * **Etiology:** Caused by **Gram-negative bacterial endotoxins** found in the cotton dust. * **Diagnosis:** Primarily clinical history and a significant drop in **FEV1** during the first shift of the work week. * **Prevention:** Use of "Pre-cotton" (steamed cotton), effective exhaust ventilation, and periodic medical check-ups.

Q: Benefits under the Employees State Insurance scheme include all the following except?

Dearness allowance. The **Employees’ State Insurance (ESI) Act, 1948** is a comprehensive social security legislation designed to provide protection to employees against sickness, maternity, disablement, and death due to employment injury. ### **Why "Dearness Allowance" is the Correct Answer** **Dearness Allowance (DA)** is a cost-of-living adjustment allowance paid by an employer to employees as part of their regular salary to mitigate the impact of inflation. It is a component of **wages**, not a benefit provided by the ESI Corporation. The ESI scheme provides social security benefits, whereas DA is a statutory requirement of the employment contract. ### **Analysis of Other Options** * **A. Dependent’s Benefit:** If an insured person dies as a result of an employment injury or occupational disease, their dependents (widow, children, or parents) receive a monthly pension. * **B. Funeral Benefit:** A lump-sum payment (currently up to ₹15,000) is paid to the eldest surviving member of the family or the person who actually incurs the expenditure of the funeral. * **D. Rehabilitation Allowance:** This is paid to insured persons for each day they are admitted to an Artificial Limb Center for fixation/repair of artificial limbs. ### **High-Yield ESI Facts for NEET-PG** * **The "Seven Benefits":** Sickness, Maternity, Disablement, Dependent’s, Medical, Funeral, and Rehabilitation benefits. * **Wage Ceiling:** Currently applies to employees earning up to **₹21,000 per month** (₹25,000 for persons with disabilities). * **Contribution Rates:** Employer’s share is **3.25%** and Employee’s share is **0.75%** of the wages (Total = 4%). * **Medical Benefit:** This is the only benefit provided in **kind** (medical care); all others are generally cash benefits. * **Sickness Benefit:** Provides 70% of average daily wages for a maximum of 91 days in two consecutive benefit periods.

Q: Lung cancer is an occupational hazard associated with which industry?

Gas industry. ### Explanation **Correct Option: C. Gas Industry** Occupational lung cancer is primarily associated with exposure to polycyclic aromatic hydrocarbons (PAHs), coal tar, and combustion products. Workers in the **gas industry** (specifically coal gasification) are exposed to high concentrations of these volatile coal-tar distillates. The International Agency for Research on Cancer (IARC) classifies "Coal gasification" as a Group 1 carcinogen. Other industries linked to lung cancer include asbestos mining, nickel refining, and chromate manufacturing. **Analysis of Incorrect Options:** * **A. Chimney Sweeping:** This is classically associated with **Squamous Cell Carcinoma of the Scrotum** (Percivall Pott’s cancer), the first recognized occupational cancer. While they have a risk of lung cancer, the "textbook" association for chimney sweeps is scrotal cancer. * **B. Aniline Industry:** Exposure to aromatic amines (like benzidine and 2-naphthylamine) in the aniline dye and rubber industries is a major risk factor for **Urinary Bladder Cancer**. * **D. Benzene Industry:** Benzene exposure (common in petroleum and chemical industries) is strongly linked to hematological malignancies, specifically **Acute Myeloid Leukemia (AML)**. **High-Yield Clinical Pearls for NEET-PG:** * **Most common occupational cancer:** Skin cancer (due to UV/polycyclic hydrocarbons). * **Bladder Cancer:** Associated with aromatic amines (Dye/Rubber industry). * **Angiosarcoma of Liver:** Associated with Vinyl Chloride (PVC industry). * **Mesothelioma:** Specifically linked to Asbestos (Crocidolite variety). * **Beryllium:** Associated with lung cancer and sarcoid-like granulomas (Berylliosis). * **Rule of Thumb:** If "Lung Cancer" is the question and "Asbestos" isn't an option, look for Gas/Coke oven workers or Chromates.

Q: Which of the following is NOT a social security act for industrial workers?

Employment and Labour Act. **Explanation:** In Occupational Health, **Social Security** refers to the protection provided by society to its members through a series of public measures against economic and social distress. The **Employment and Labour Act** is the correct answer because it is a generic term and does not exist as a specific, standalone social security legislation in India. While there are various "Labour Laws," this specific title is not a recognized act providing social security benefits. **Analysis of Incorrect Options:** * **Workmen's Compensation Act (1923):** One of the earliest social security measures in India. it provides for the payment of compensation by certain classes of employers to their workers for injury by accident or occupational diseases arising out of employment. * **Central Maternity Benefit Act (1961):** A vital social security act that regulates the employment of women in certain establishments for certain periods before and after childbirth and provides for maternity benefits (paid leave and medical bonus). * **Factories Act (1948):** While primarily a health and safety act, it is considered a pillar of industrial legislation. It contains provisions for the health, safety, and welfare of workers (e.g., washing facilities, first aid, creches), which fall under the broader umbrella of social security and worker protection. **High-Yield NEET-PG Pearls:** * **ESI Act (1948):** The most comprehensive social security legislation in India. It covers medical, sickness, maternity, disablement, and dependent benefits. * **Pneumoconiosis:** Under the Workmen’s Compensation Act, several occupational lung diseases (Silicosis, Anthracosis, Byssinosis) are compensable. * **Maternity Benefit:** Under the 2017 amendment, the duration of paid maternity leave was increased from 12 to **26 weeks**. * **Factories Act:** Requires a mandatory **Safety Officer** if a factory employs 1,000 or more workers.

Q: Which carcinoma is common in dye industry workers?

Urinary bladder. **Explanation:** **Correct Option: C. Urinary Bladder** The association between the dye industry and **Urinary Bladder Carcinoma** is a classic concept in occupational toxicology. Workers in the dye, rubber, and textile industries are frequently exposed to **Aromatic Amines**, specifically **Benzidine** and **Beta-naphthylamine**. These chemicals are absorbed through the skin or lungs, metabolized in the liver, and excreted via the kidneys. While stored in the bladder, these metabolites act as potent carcinogens on the urothelium. The latent period between exposure and tumor development is typically long, often 10–20 years. **Analysis of Incorrect Options:** * **A. Skin:** While skin cancers are associated with exposure to UV radiation, coal tar, and mineral oils, they are not the primary malignancy linked to aromatic amine exposure in the dye industry. * **B. Scrotum:** Scrotal cancer (Percivall Pott’s "Chimney Sweep Cancer") is historically linked to soot and polycyclic aromatic hydrocarbons (PAHs) found in coal tar and mineral oils, rather than dye chemicals. * **D. Maxilla:** Carcinoma of the maxillary sinus is specifically associated with the **woodworking and furniture industry** (due to hardwood dust) and the leather industry, not the dye industry. **High-Yield Clinical Pearls for NEET-PG:** * **Screening:** Workers exposed to aromatic amines should undergo regular **Papanicolaou (Pap) smears of urine** (Exfoliative Cytology) to detect early malignant changes. * **Key Carcinogens:** Benzidine, Beta-naphthylamine, and Magenta are the primary culprits. * **Other Occupational Cancers:** * **Angiosarcoma of Liver:** Vinyl Chloride (PVC industry). * **Mesothelioma/Lung Cancer:** Asbestos. * **Leukemia:** Benzene. * **Nasal Sinus Cancer:** Nickel and Wood dust.

Q: What is the minimum duration for the development of coal worker's pneumoconiosis?

More than 10 years. **Explanation:** **Coal Worker’s Pneumoconiosis (CWP)**, also known as "Black Lung Disease," is a chronic occupational lung disease caused by the prolonged inhalation of coal dust. **Why "More than 10 years" is correct:** The development of CWP is a slow, progressive process. It depends on the cumulative "dust burden" in the lungs. Coal dust is less fibrogenic compared to silica; therefore, it takes a significantly longer duration of exposure—typically **at least 10 to 12 years** of underground mining—for the dust to accumulate in the terminal bronchioles and cause detectable coal macules or nodules on a chest X-ray. **Why other options are incorrect:** * **A & B (2–6 years):** These durations are too short for the pathophysiology of CWP. Such rapid onset is usually only seen in "Acute Silicosis" (Silicoproteinosis), which occurs after massive exposure to fine silica dust over 1–3 years. * **C (8–10 years):** While some early radiological changes might begin to appear, the standard clinical and epidemiological consensus for the manifestation of established CWP is a duration exceeding 10 years. **High-Yield Clinical Pearls for NEET-PG:** * **Pathognomonic Lesion:** The **Coal Macule** is the fundamental lesion of CWP. * **Progressive Massive Fibrosis (PMF):** This is the complicated stage of CWP, characterized by large masses of black fibrous tissue (>1 cm). * **Caplan’s Syndrome:** The association of CWP (or Silicosis) with Rheumatoid Arthritis, presenting as multiple necrobiotic nodules in the lungs. * **Radiology:** CWP typically affects the **upper lobes** of the lungs initially. * **Statutory Notification:** In India, CWP is a **notifiable disease** under the Factories Act and the Mines Act.

Q: Asbestosis is not associated with which of the following?

Ascites. **Explanation:** Asbestosis is a chronic fibrotic interstitial lung disease caused by the inhalation of asbestos fibers. The correct answer is **Ascites** because it is a clinical sign of fluid accumulation in the peritoneal cavity (often due to liver cirrhosis or heart failure) and is not a direct pathological consequence or malignancy associated with asbestos exposure. **Analysis of Options:** * **Carcinoma of the Lung (Option A):** This is the **most common** malignancy associated with asbestos exposure. There is a synergistic effect between asbestos and cigarette smoking, which exponentially increases the risk of bronchogenic carcinoma. * **Carcinoma of the Esophagus (Option C):** Asbestos fibers can be swallowed after being cleared from the respiratory tract via the mucociliary escalator. This leads to an increased risk of extra-thoracic malignancies, including cancers of the esophagus, stomach, and colon. * **Mesothelioma (Option D):** This is a rare tumor of the pleura or peritoneum. While lung cancer is more common, mesothelioma is the **most specific** marker of asbestos exposure. Unlike lung cancer, its risk is not increased by smoking. **High-Yield Clinical Pearls for NEET-PG:** 1. **Pathognomonic Sign:** Presence of **Asbestos bodies** (ferruginous bodies) in the sputum or lung tissue (golden-brown, dumbbell-shaped). 2. **Radiology:** Characterized by "ground-glass" opacities in the lower lobes and **pleural plaques** (most common radiological finding), often involving the diaphragm. 3. **Latency Period:** Asbestos-related diseases have a long latency period, typically 15–40 years after exposure. 4. **Safe Limits:** The WHO/ILO recommended exposure limit is 0.1 fiber/mL.

Q: Bagassosis is caused by?

Sugar cane. **Explanation:** **Bagassosis** is an occupational lung disease caused by the inhalation of dust from **sugar cane** residue (bagasse) after the juice has been extracted. It is classified as a type of **Hypersensitivity Pneumonitis** (Extrinsic Allergic Alveolitis). The specific causative agent is a thermophilic actinomycete, most commonly ***Thermoactinomyces sacchari***, which grows in stored, moldy bagasse. **Analysis of Options:** * **Sugar cane (Correct):** Bagasse is the fibrous waste of sugar cane. When stored in damp conditions, it undergoes fermentation, promoting the growth of fungi/actinomycetes. Inhalation of these spores leads to an allergic reaction in the alveoli. * **Free silica (Incorrect):** Inhalation of free silica (silicon dioxide) causes **Silicosis**, the most common and serious pneumoconiosis, typically seen in mining, sandblasting, and stone cutting. * **Coal (Incorrect):** Inhalation of coal dust leads to **Coal Worker’s Pneumoconiosis (CWP)**, also known as "Black Lung Disease." * **Cotton fibre (Incorrect):** Inhalation of cotton, flax, or hemp dust causes **Byssinosis** (also known as "Monday Chest Tightness"). **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Feature:** Characterized by sudden onset of breathlessness, cough, and fever. * **Radiology:** Shows "miliary mottling" or a "ground-glass appearance" in the lungs. * **Prevention:** The most effective preventive measure is **moistening the bagasse** (spraying with 2% propionic acid) to prevent dust from rising and inhibiting fungal growth. * **Differential:** Do not confuse with **Farmer’s Lung**, which is caused by moldy hay/grain (*Micropolyspora faeni*).

Q: A paper mill worker presents with respiratory distress and occupational pneumonia. What is the most probable diagnosis?

Bagassosis. **Explanation:** **Bagassosis** is the correct diagnosis because it is a hypersensitivity pneumonitis caused by the inhalation of dust from **bagasse** (crushed sugar cane residue). In India, bagasse is extensively used as a raw material in the **paper manufacturing industry** and for making cardboard. The condition is specifically triggered by a thermophilic actinomycete, *Thermoactinomyces sacchari*, which grows in stored, moist bagasse. Clinically, it presents as acute respiratory distress, cough, and fever, which can progress to chronic lung fibrosis if exposure continues. **Analysis of Incorrect Options:** * **Byssinosis:** Also known as "Monday Morning Fever," this is caused by **cotton dust** inhalation. It is prevalent in textile mill workers, not paper mills. * **Asbestosis:** A form of pneumoconiosis caused by **asbestos fibers**. It is associated with mining, insulation work, and shipbuilding, characterized by interstitial fibrosis and pleural plaques. * **Anthracosis:** Caused by the inhalation of **coal dust**. It is primarily seen in coal miners and is often asymptomatic unless it progresses to Progressive Massive Fibrosis (PMF). **High-Yield Clinical Pearls for NEET-PG:** * **Prevention:** Bagassosis can be prevented by treating bagasse with **2% Propionic acid** (to prevent fungal growth) and maintaining high moisture content to settle dust. * **Radiology:** Chest X-ray typically shows a "mottled" appearance or fine punctate shadows. * **Differentiating Tip:** Always link the **Industry** to the **Dust**: * Sugar/Paper Mill → Bagasse * Textile Mill → Cotton * Foundries/Sandblasting → Silica * Grain Silos/Hay → Farmer’s Lung (*Micropolyspora faeni*)

Question 1

Which one of the following is the most common initial symptom of byssinosis?

Accepted Answer

Chest tightness

Answer

Wheezing

Answer

Cough

Answer

Haemoptysis

Question 2

Benefits under the Employees State Insurance scheme include all the following except?

Accepted Answer

Dearness allowance

Answer

Dependent's benefit

Answer

Funeral benefit

Answer

Rehabilitation Allowance

Question 3

Lung cancer is an occupational hazard associated with which industry?

Accepted Answer

Gas industry

Answer

Chimney sweeping

Answer

Aniline industry

Answer

Benzene industry

Question 4

Which of the following is NOT a social security act for industrial workers?

Accepted Answer

Employment and Labour Act

Answer

Workmen's Compensation Act

Answer

Central Maternity Benefit Act

Answer

Factories Act

Question 5

Which carcinoma is common in dye industry workers?

Accepted Answer

Urinary bladder

Answer

Skin

Answer

Scrotum

Answer

Maxilla

Question 6

What is the minimum duration for the development of coal worker's pneumoconiosis?

Accepted Answer

More than 10 years

Answer

2–4 years

Answer

4–6 years

Answer

8–10 years

Question 7

Asbestosis is not associated with which of the following?

Accepted Answer

Ascites

Answer

Carcinoma of the lung

Answer

Carcinoma of the esophagus

Answer

Mesothelioma

Question 8

A nationwide survey of industries and factories was conducted. While arranging the data, the researchers observed that the most common occupational cancer was:

Accepted Answer

Cancer of the skin

Answer

Cancer of the bladder

Answer

Cancer of the lung

Answer

Leukemia

Question 9

Bagassosis is caused by?

Accepted Answer

Sugar cane

Answer

Free silica

Answer

Coal

Answer

Cotton fibre

Question 10

A paper mill worker presents with respiratory distress and occupational pneumonia. What is the most probable diagnosis?

Accepted Answer

Bagassosis

Answer

Byssinosis

Answer

Asbestosis

Answer

Anthracosis

Occupational Health — MCQs

Occupational Health — MCQs

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