Occupational Health — MCQs

Occupational Health Indian Medical PG Practice Questions and MCQs

Question 201: Inhalation of sugarcane dust could cause

A. Bagassosis (Correct Answer)
B. Farmer's Lungs
C. Tobacosis
D. Byssinosis

Explanation: ***Bagassosis (Correct Answer)*** - **Bagassosis** is a form of **extrinsic allergic alveolitis (hypersensitivity pneumonitis)** specifically caused by inhaling dust from **bagasse**, the fibrous residue left after crushing sugarcane. - The causative agents are **thermophilic actinomycetes** (*Thermoactinomyces sacchari* and *T. vulgaris*) that grow in stored, moldy bagasse. - This is an **occupational lung disease** seen in workers in sugarcane processing industries. *Farmer's Lung (Incorrect)* - This is also a form of **extrinsic allergic alveolitis** but is caused by inhaling dust from **moldy hay**, not sugarcane. - The allergens are thermophilic actinomycetes found in agricultural hay and grain, such as *Micropolyspora faeni* and *Thermoactinomyces vulgaris*. - Occurs in agricultural workers, not sugarcane industry workers. *Tobacosis (Incorrect)* - **Tobacosis** refers to lung disease associated with exposure to **tobacco dust**, affecting workers in tobacco processing industries. - It is distinct from conditions caused by sugarcane dust exposure. *Byssinosis (Incorrect)* - Also known as **"brown lung disease"**, byssinosis is an occupational lung disease caused by inhaling dust from **cotton, flax, or hemp**. - Characteristically presents with symptoms that worsen on the **first day back to work** after a weekend break (Monday fever). - Not related to sugarcane dust exposure.

Question 202: Recommended illumination range for regular work is _______ foot-candles.

A. 75-100
B. 10-25
C. 50-75
D. 25-50 (Correct Answer)

Explanation: ***25-50*** - For **regular work** or tasks requiring moderate visual effort, an illumination range of **25-50 foot-candles** (250-500 lux) is generally recommended to ensure adequate visibility and comfort. - This range balances sufficient light for tasks like **reading** or **writing** without causing glare or excessive energy consumption. *75-100* - An illumination range of **75-100 foot-candles** (750-1000 lux) is typically reserved for **tasks requiring precise visual acuity** or where fine details must be observed, such as intricate assembly work or detailed inspections. - Using such high illumination for regular work can lead to **eye strain** and excessive energy use. *10-25* - A range of **10-25 foot-candles** (100-250 lux) is suitable for **general lighting** in areas requiring minimal visual tasks, like hallways, lounges, or waiting areas where reading or close work is not primary. - This level is usually **insufficient for sustained regular work**, which often involves reading or writing. *50-75* - **50-75 foot-candles** (500-750 lux) is often recommended for **more demanding office work** or tasks involving prolonged reading of small print, which is a step above regular general work. - While it could be acceptable for some regular work, **25-50 foot-candles** is a more common and energy-efficient recommendation for general regular tasks.

Question 203: A 45-year-old man who works in a textile company visited hospital for routine health check-up. He prepares dyes in the company for the last 18 years. Which of the following investigation would you recommend for this patient?

A. Pulmonary function tests
B. Complete blood count
C. Liver function tests
D. Urine examination (Correct Answer)

Explanation: ***Urine examination*** - Working in a textile company, especially with dyes, for 18 years significantly increases the risk of exposure to **aromatic amines**, which are established occupational carcinogens. - Exposure to **aromatic amines** is strongly linked to an increased risk of **bladder cancer**, making a periodic urine examination, including cytology, crucial for early detection. *Pulmonary function tests* - While textile workers can be exposed to **fibers and dusts** causing respiratory issues like byssinosis, the primary and most concerning risk associated with **dye exposure** is bladder cancer, not lung function impairment. - PFTs would be more relevant if there were specific respiratory symptoms or exposure to known **pneumoconiosis-causing contaminants**. *Complete blood count* - A CBC might detect hematological abnormalities, but it is not the most targeted or sensitive investigation for early detection of **dye-related occupational diseases**, particularly bladder cancer. - While some chemicals can affect blood cell production, the prominent carcinogenic risk here points elsewhere. *Liver function tests* - Some industrial chemicals can cause **liver toxicity**, but the most prominent and direct organ-specific cancer risk associated with long-term exposure to textile dyes containing aromatic amines is to the bladder. - LFTs would be relevant if there were signs or symptoms of **hepatic dysfunction**, but they don't address the primary cancer risk in this scenario.

Question 204: As per the Factory Act, the maximum working hours per week is:

A. 42 hours
B. 35 hours
C. 48 hours (Correct Answer)
D. 56 hours

Explanation: ***48 hours*** - The Factory Act, 1948, stipulates that no adult worker shall be required or allowed to work in a factory for more than **forty-eight hours in any week**. - This limit is put in place to ensure workers' safety and health, preventing excessive fatigue and promoting a reasonable work-life balance. *42 hours* - This is below the maximum limit set by the Factory Act and is not the legally prescribed maximum. - While some industries or specific roles might have lower working hours, the Act's upper limit is not 42 hours. *35 hours* - This is significantly lower than the legal maximum working hours and is generally encountered in part-time work or specific contractual agreements, not as a general maximum under the Factory Act. - Such low hours are not the standard set for full-time employment by the Act. *56 hours* - Working 56 hours per week would exceed the maximum limit permitted by the Factory Act, 1948. - Exceeding 48 hours would require specific provisions for overtime work, which is strictly regulated and not the standard maximum.

Question 205: Mesothelioma is closely associated with which of the following?

A. Silicosis
B. Anthracosis
C. Byssinosis
D. Asbestosis (Correct Answer)

Explanation: ***Asbestosis*** - Mesothelioma is a rare but aggressive cancer of the **pleura** or **peritoneum**, and its strongest known etiological link is with **asbestos exposure**. - Asbestos fibers can become lodged in the lungs and pleural lining, leading to chronic inflammation, DNA damage, and eventually oncogenic transformation. *Silicosis* - **Silicosis** is a lung disease caused by inhaling **crystalline silica dust**, primarily affecting miners, construction workers, and foundry workers. - While it can lead to pulmonary fibrosis and an increased risk of tuberculosis and lung cancer, it is not directly associated with mesothelioma. *Anthracosis* - **Anthracosis** is often seen in coal miners and urban dwellers due to the inhalation of **carbon dust**, leading to the accumulation of pigment in the lungs. - This condition is generally benign but can contribute to the development of **coal worker's pneumoconiosis**, which is distinct from mesothelioma. *Byssinosis* - **Byssinosis** is an occupational lung disease caused by the inhalation of **cotton dust** or other textile dusts, typically affecting textile workers. - Symptoms include chest tightness and shortness of breath, particularly after beginning work after a break, and it is unrelated to mesothelioma.

Question 206: What is the recommended frequency for periodic health examination of radiation workers according to AERB guidelines?

A. Every month
B. Every 6 months
C. Every 2 months
D. Every year (Correct Answer)

Explanation: ***Every year*** - According to **AERB (Atomic Energy Regulatory Board) Safety Code SC/MED-2**, **periodic health examinations** for radiation workers are recommended **at least once annually** (every year). - This is the **standard frequency** for routine monitoring of Category B radiation workers and those in normal working conditions. - Annual examinations provide adequate surveillance for early detection of health effects while being practical and cost-effective. - **More frequent examinations** (every 6 months) may be required for **special circumstances**: Category A workers (high exposure), workers above 50 years, or following exposure incidents. *Every 6 months* - This frequency is **not the standard** routine requirement but applies to **special categories** only. - Six-monthly examinations are recommended for **Category A workers** (those likely to receive higher doses) or workers over 50 years of age. - Implementing this for all radiation workers would be unnecessarily frequent and resource-intensive. *Every month* - This frequency is **excessively frequent** and not stipulated by AERB for routine monitoring. - Monthly checks are reserved for **acute exposure incidents** or specific medical management situations requiring close follow-up. *Every 2 months* - This frequency is **not mentioned** in AERB guidelines and represents no standard practice. - It would impose unnecessary burden without evidence-based benefits over the recommended annual interval.

Question 207: A 30-year-old male works in a factory where he is exposed to dust. What is the most appropriate primary prevention measure for occupational lung disease?

A. Regular medical check-ups
B. Use of respiratory protective equipment (Correct Answer)
C. Medications for symptoms
D. Health education sessions

Explanation: ***Use of respiratory protective equipment*** - This is a **primary prevention** measure as it directly **prevents exposure** to harmful dust in the workplace, thereby averting the development of occupational lung disease. - By creating a physical barrier, **respiratory protective equipment (RPE)** minimizes the inhalation of particulate matter that could otherwise lead to cough, shortness of breath, and long-term respiratory damage. *Regular medical check-ups* - While important for **early detection** and monitoring, regular medical check-ups fall under **secondary prevention**, as they aim to identify conditions once they have started or to monitor progression. - They do not prevent the initial exposure or the onset of the disease itself. *Medications for symptoms* - Providing medications for symptoms like cough and shortness of breath is a form of **tertiary prevention** or treatment, which aims to alleviate discomfort and manage an existing condition. - It does not prevent the underlying exposure or the development of the disease. *Health education sessions* - Health education is a valuable **primary prevention** strategy, but it is an indirect measure. - While it can raise awareness and promote safer practices, it does not provide the immediate, direct physical protection against dust exposure that respiratory protective equipment offers.

Question 208: A 30-year-old construction worker presents with a cough and shortness of breath. A chest X-ray shows bilateral interstitial infiltrates. What environmental exposure is most likely responsible?

A. Asbestos
B. Silica (Correct Answer)
C. Radon
D. Lead

Explanation: ***Silica*** - A **construction worker** with **cough, shortness of breath**, and **bilateral interstitial infiltrates** is highly suggestive of **silicosis**, a lung disease caused by inhaling crystalline silica dust. - Silica exposure is common in construction trades involving tasks like cutting, grinding, or drilling concrete, rock, and ceramics. *Asbestos* - While asbestos exposure can cause interstitial lung disease (**asbestosis**), it is typically associated with different occupations (e.g., insulation, shipbuilding) and often manifests with characteristic **pleural plaques** or calcifications, which are not mentioned here. - Exposure to asbestos generally leads to a longer latency period for symptom development compared to silica. *Radon* - Radon is a naturally occurring radioactive gas that is an important cause of **lung cancer**, particularly in smokers. - It does not typically cause **interstitial lung disease** with bilateral infiltrates in the way described. *Lead* - Lead exposure primarily affects the **nervous system, kidneys, and hematopoietic system**, leading to symptoms like neurological deficits, nephropathy, and anemia. - It does not cause primary **pulmonary interstitial infiltrates** or lung disease as described in the patient.

Question 209: A factory worker exposed to asbestos presents with respiratory symptoms. Which primary prevention measure is most appropriate to reduce the risk of asbestosis in these workers?

A. Periodic health check-ups
B. Use of personal protective equipment (Correct Answer)
C. Regular spirometry
D. Antioxidant supplementation

Explanation: ***Use of personal protective equipment*** - **Using PPE**, such as respirators, prevents the inhalation of asbestos fibers, directly addressing the exposure that causes asbestosis. - This is a **primary prevention** measure because it aims to prevent the onset of the disease by eliminating or reducing exposure to the hazardous agent. *Periodic health check-ups* - **Periodic health check-ups** are a **secondary prevention** strategy, aiming for early detection of the disease rather than preventing its occurrence. - While beneficial for monitoring worker health, they do not prevent initial exposure to asbestos. *Regular spirometry* - **Regular spirometry** is a **secondary prevention** measure designed to detect changes in lung function early, signaling disease progression. - It does not prevent exposure to asbestos or the development of the disease itself. *Antioxidant supplementation* - **Antioxidant supplementation** is a **tertiary prevention** measure that might help mitigate cellular damage once exposure has occurred, but it does not prevent the initial exposure or the direct pathological effects of asbestos. - Its role in preventing asbestosis is not well-established as a primary preventative strategy.

Question 210: Which of the following best describes the 'healthy worker effect' in occupational epidemiology?

A. Workers are healthier than the general population (Correct Answer)
B. Workers have a higher incidence of disease
C. Sick workers are more likely to remain employed
D. There is no difference in health status between workers and the general population

Explanation: ***Workers are healthier than the general population*** - The **healthy worker effect** refers to the phenomenon where the health status of an actively employed population is generally better than that of the general population. - This occurs because individuals who are too sick or disabled to work are excluded from the workforce, leading to a **selection bias** in occupational studies. *Workers have a higher incidence of disease* - This statement describes a situation where **occupational exposures** might lead to disease, which is the opposite of the healthy worker effect. - While certain occupations can increase disease risk, the healthy worker effect specifically highlights the initial **selection of healthier individuals** into the workforce. *Sick workers are more likely to remain employed* - This is incorrect; generally, **sick or less healthy individuals** are **less likely to be employed** or to remain employed for long periods. - The healthy worker effect arises because those who are unhealthy tend to leave or not enter the workforce, thus **inflating the perceived health** of the working population. *There is no difference in health status between workers and the general population* - This is false, as the healthy worker effect posits a **significant difference** in health status, with workers generally being healthier. - Ignoring this effect can lead to an **underestimation of occupational health risks** because the comparison group (general population) includes individuals less healthy than the workforce.

Practice by Chapter

Occupational Hazards: Classification

Practice Questions

Occupational Diseases

Practice Questions

Ergonomics

Practice Questions

Industrial Toxicology

Practice Questions

Occupational Cancers

Practice Questions

Work-Related Musculoskeletal Disorders

Practice Questions

Occupational Health Services

Practice Questions

Industrial Hygiene

Practice Questions

Assessment of Work Environment

Practice Questions

Personal Protective Equipment

Practice Questions

Occupational Health Legislation

Practice Questions

Workers' Compensation

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free