Occupational Health — MCQs

With reference to occupational cancers, consider the following statements : 1. Skin cancer is a common occupational hazard in workers employed in nickel and chromium work. 2. Cancer bladder is an occupational hazard in workers employed in dye-stuffs and dyeing industry. 3. Leukaemia can occur on long exposure to benzol. 4. Lung cancer is typically found in workers employed in electric cable industries. Which of the statements given above are correct ?

Q168

Raju is 30 years of age. He has been working in the ceramic and pottery industry for the last 10 years. Which one of the following conditions should he be screened for?

Q169

Match List-I with List-II and select the correct answer using the code given below the Lists:

Q170

Match List-I with List-II and select the correct answer using the code given below the Lists: List-I (Pneumoconioses): A. Anthracosis B. Byssinosis C. Bagassosis D. Silicosis List-II (Occupational Exposures): 1. Textile industry 2. Coal mining 3. Building and construction work 4. Paper industry Codes:

Occupational Health Indian Medical PG Practice Questions and MCQs

Question 161: Sickness absenteeism of workers in the industry is used to evaluate

A. Community health
B. Industrial environment
C. Health of the worker (Correct Answer)
D. Health of the family

Explanation: ***Health of the worker*** - Sickness absenteeism refers to the time off work certified due to the worker's own illness, making it a direct and crucial indicator of the **individual worker's health status** - This metric allows occupational health services to evaluate the **morbidity pattern** and effectiveness of health programs within the working population - It is one of the key indicators used in **occupational health surveillance** *Health of the family* - Sickness absenteeism specifically tracks the worker's certified inability to work due to **personal illness**, not the health status of their household or dependents - While caring for sick family members might lead to absence from work, it is not captured under the definition of **sickness absenteeism** *Industrial environment* - Sickness absenteeism is a **health outcome** measure reflecting illness, not a direct measurement of the physical or chemical features of the **industrial environment** itself - To evaluate the industrial environment, specific techniques like **environmental monitoring**, **risk assessment**, or **occupational hazard surveillance** are employed *Community health* - Sickness absenteeism is restricted to the specific, relatively homogeneous population of **employed workers** within that industry - **Community health** is typically evaluated using broader epidemiological indicators covering the entire population, such as **mortality rates**, **disease prevalence**, or **incidence rates** in the general public

Question 162: An 8 weeks pregnant woman, working in an industry, consults a doctor. According to the ESI act, what is the duration of maternity leave that she can get?

A. 4 months
B. 28 weeks, starting from 4 weeks after delivery
C. 26 weeks, starting from 8 weeks before delivery (Correct Answer)
D. 9 months

Explanation: ***26 weeks, starting from 8 weeks before delivery*** - This duration is mandated by the **Maternity Benefit (Amendment) Act, 2017**, which governs the maternity benefits paid through the **ESI scheme** for eligible insured women - This applies for the first two surviving children - The total paid leave entitlement is **26 weeks** (or 182 days), which can be availed for a period not exceeding **8 weeks** immediately preceding the expected date of delivery *4 months* - Four months is approximately **17 weeks**, which is substantially less than the **26 weeks** maximum paid leave guaranteed under the ESI Act and the Maternity Benefit Act - Such a short duration does not comply with current statutory requirements aimed at promoting maternal health and child welfare *28 weeks, starting from 4 weeks after delivery* - The statutory maximum paid maternity leave duration is **26 weeks**, making **28 weeks** an excess entitlement not provided under the current law - The woman is legally entitled to begin her leave up to **8 weeks** prior to the expected delivery date, not just post-delivery, enabling vital pre-natal rest *9 months* - Nine months (approximately **39 weeks**) is significantly longer than the standard paid maternity leave duration of **26 weeks** provided by the ESI Act - While some organizations may offer extended unpaid leave, **9 months** is not the statutory duration for compensated maternity benefit

Question 163: One of the following is not seen in a worker exposed to mercury in a thermometer manufacturing company:

A. Tremors and Mad Hatter's disease
B. Peripheral neuropathy
C. Basophilic stippling (Correct Answer)
D. Mees' lines

Explanation: ***Basophilic stippling*** - **Basophilic stippling** is a characteristic finding in the peripheral blood smear of patients with **lead poisoning**, caused by the inhibition of pyrimidine 5'-nucleotidase, leading to aggregated RNA. - It is **not associated** with chronic mercury exposure, which primarily affects the neurological and renal systems. - This is the correct answer as basophilic stippling is NOT seen in mercury poisoning. *Tremors and Mad Hatter's disease* - **Tremors** (intention tremor) are a classic sign of chronic inhaled elemental mercury exposure, often leading to a condition historically known as **"Mad Hatter's disease"** (erethism). - **Erethism** is a neuropsychiatric syndrome characterized by irritability, shyness, insomnia, emotional lability, and loss of memory, resulting from mercury's neurotoxicity. - This IS seen in mercury-exposed workers. *Mees' lines* - **Mees' lines** (transverse white bands on the fingernails) are classically associated with **arsenic** and **thallium** poisoning, NOT mercury poisoning. - While the original explanation incorrectly linked this to mercury, Mees' lines are not a typical manifestation of mercury toxicity. - Mercury poisoning causes neurological (tremors, erethism) and renal manifestations, not Mees' lines. - This option is somewhat controversial but traditionally NOT considered a classic sign of mercury poisoning. *Peripheral neuropathy* - Exposure to **organic mercury compounds** (like methylmercury) is known to cause severe neurological damage, including **peripheral neuropathy**, visual field constriction, and hearing impairment. - Chronic high-level exposure to elemental mercury vapor can also lead to neuropathic symptoms. - This IS seen in mercury-exposed workers.

Question 164: With which variety of asbestos, Mesothelioma has been shown to have a strong association?

A. Crocidolite (Correct Answer)
B. Amosite
C. Chrysotile
D. Anthophyllite

Explanation: ***Crocidolite*** - **Crocidolite**, also known as blue asbestos, is the type of asbestos with the **strongest association** with the development of **mesothelioma**. - Its thin, needle-like fibers are highly durable and tend to penetrate deeply into lung tissue, making it particularly carcinogenic. *Amosite* - **Amosite**, or brown asbestos, is also associated with an increased risk of mesothelioma, but its carcinogenic potential is generally considered **lower than crocidolite**. - Exposure to amosite can also lead to other asbestos-related diseases such as **asbestosis** and **lung cancer**. *Chrysotile* - **Chrysotile**, or white asbestos, is the most commonly used type of asbestos and is generally thought to be **less carcinogenic** than amphibole forms like crocidolite and amosite. - While it can still cause mesothelioma, the risk is lower compared to crocidolite, and it is more commonly associated with **asbestosis**. *Anthophyllite* - **Anthophyllite** is a rare form of asbestos with a limited industrial history and **less data** regarding its direct association with mesothelioma compared to other types. - However, like all asbestos fibers, it is classified as a human carcinogen and exposure can contribute to the development of asbestos-related diseases.

Question 165: How much illumination is recommended by the Illuminating Engineering Society for general office work?

A. 200 lux
B. 100 lux
C. 400 lux (Correct Answer)
D. 900 lux

Explanation: ***400 lux*** - The **Illuminating Engineering Society (IES)** recommends 400 lux for general office work, which includes tasks requiring moderate visual precision. - This level of illumination ensures **adequate visibility** and **reduces eye strain** for typical office activities. *200 lux* - This level is generally considered **too low** for detailed office work and would likely lead to eye fatigue and reduced productivity. - 200 lux might be suitable for casual areas like **corridors** or **waiting rooms**, but not for active work environments. *100 lux* - **100 lux** is an extremely low level of illumination, typically suitable for areas with very minimal visual requirements, such as **storage rooms or archives**. - It is **insufficient** for any form of general office work, making tasks difficult and uncomfortable. *900 lux* - While providing high illumination, **900 lux** is usually considered **excessive** for general office work and can lead to glare and discomfort. - Such high levels are typically reserved for **precision tasks** like drafting or detailed examination, where very fine visual discrimination is needed.

Question 166: What is the limit of daily exposure of noise that people can tolerate without substantial damage to their hearing?

A. 105 dB
B. 85 dB (Correct Answer)
C. 65 dB
D. 90 dB

Explanation: ***85 dB*** - The **National Institute for Occupational Safety and Health (NIOSH)** and **WHO** recommend an exposure limit of **85 dB** averaged over an 8-hour workday to prevent noise-induced hearing loss. - This is the internationally recognized safe limit; OSHA uses 85 dB as the **action level** for implementing hearing conservation programs (though OSHA's permissible exposure limit is 90 dB). - Exposure to noise levels above this threshold for prolonged periods can cause **permanent damage** to the hair cells in the cochlea. *Incorrect Option: 105 dB* - Exposure to **105 dB** for even a short duration (e.g., 10-15 minutes) can cause significant and potentially **irreversible hearing damage**. - This level is characteristic of very loud environments such as **heavy machinery** or **live concerts**. *Incorrect Option: 65 dB* - This level is considered **safe and non-damaging** for daily exposure even over extended periods. - It is typically the noise level of a normal **conversation** or a quiet office environment. - This is below the threshold where hearing protection is needed. *Incorrect Option: 90 dB* - While 90 dB is OSHA's permissible exposure limit for an 8-hour average, it carries a **higher risk of hearing loss** compared to the safer 85 dB standard. - Prolonged exposure at this level significantly increases the likelihood of developing **noise-induced hearing impairment**. - NIOSH and WHO recommend the lower 85 dB limit for better hearing protection.

Question 167: With reference to occupational cancers, consider the following statements : 1. Skin cancer is a common occupational hazard in workers employed in nickel and chromium work. 2. Cancer bladder is an occupational hazard in workers employed in dye-stuffs and dyeing industry. 3. Leukaemia can occur on long exposure to benzol. 4. Lung cancer is typically found in workers employed in electric cable industries. Which of the statements given above are correct ?

A. 1, 2 and 3 only (Correct Answer)
B. 1 and 2 only
C. 2 and 3 only
D. 1 and 4 only

Explanation: ***1, 2 and 3 only*** - **Skin cancer** is a well-documented occupational hazard for workers exposed to compounds like **nickel and chromium**, which are known **carcinogens**. - **Bladder cancer** is strongly linked to exposure to aromatic amines found in **dye-stuffs and the dyeing industry**. - **Leukaemia** is a known risk associated with prolonged exposure to **benzene (benzol)**, a common industrial solvent. *1 and 2 only* - This option is incomplete as it correctly identifies the link between **skin cancer** and nickel/chromium exposure, and **bladder cancer** and dye-stuffs, but it omits the correct association of **leukaemia** with benzene exposure. - The statement regarding **lung cancer** in electric cable industries is generally incorrect, as lung cancer is typically associated with other occupational exposures like **asbestos** or **radon**. *2 and 3 only* - While statements 2 and 3 are correct regarding **bladder cancer** in dye industries and **leukaemia** from benzene, this option incorrectly excludes the statement about **skin cancer** in nickel and chromium work, which is also accurate. - It does not encompass all the correct occupational cancer associations presented. *1 and 4 only* - This option includes the correct association of **skin cancer** with nickel and chromium. - However, the statement regarding **lung cancer** in workers employed in electric cable industries is generally **false**, as this industry is not typically associated with a high incidence of lung cancer compared to other occupational carcinogens.

Question 168: Raju is 30 years of age. He has been working in the ceramic and pottery industry for the last 10 years. Which one of the following conditions should he be screened for?

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

Explanation: ***Silicosis*** - Working in the **ceramic and pottery industry** involves significant exposure to **silica dust**, making silicosis the most relevant occupational lung disease. - **Silicosis** is a chronic, progressive fibrotic lung disease caused by inhaling crystalline silica, common in mining, quarrying, and pottery. *Asbestosis* - **Asbestosis** is caused by the inhalation of **asbestos fibers**, typically found in construction, insulation, and shipbuilding. - While an occupational lung disease, it is not directly linked to the ceramic and pottery industry. *Anthracosis* - **Anthracosis** is commonly known as **coal workers' pneumoconiosis** and results from inhaling coal dust. - This condition is specifically associated with coal mining and not pottery work. *Byssinosis* - **Byssinosis** is an occupational lung disease caused by inhaling **cotton dust**, often seen in textile workers. - It is unrelated to exposure in the ceramic and pottery industry.

Question 169: Match List-I with List-II and select the correct answer using the code given below the Lists:

A. A→3 B→2 C→1 D→4
B. A→3 B→1 C→4 D→2
C. A→1 B→3 C→2 D→4 (Correct Answer)
D. A→4 B→2 C→3 D→1

Explanation: ***A→1 B→3 C→2 D→4*** - This option correctly matches the occupational exposures with their characteristic health effects based on the lists provided. - **Lead poisoning** classically causes **wrist drop** due to radial nerve palsy, a hallmark neurological manifestation. - **Coal tar** exposure is associated with **skin cancer** (especially scrotal cancer in historical chimney sweeps) and **lung cancer** in occupational settings. - **Aniline dye** (particularly β-naphthylamine) is a well-established cause of **bladder cancer** in dye industry workers. - **Benzol (Benzene)** is notorious for causing **hematological disorders** including aplastic anemia, pancytopenia, and leukemia. *A→3 B→2 C→1 D→4* - This option incorrectly associates the exposures with their health effects. - The matching does not align with established occupational health associations. *A→3 B→1 C→4 D→2* - This option incorrectly associates the exposures with their health effects. - The matching does not align with established occupational health associations. *A→4 B→2 C→3 D→1* - This option incorrectly associates the exposures with their health effects. - Although lead can cause anemia, its most characteristic neurological effect is **wrist drop**, which is a diagnostic hallmark. Benzol (benzene) is primarily associated with hematological disorders, not neurological manifestations like wrist drop.

Question 170: Match List-I with List-II and select the correct answer using the code given below the Lists: List-I (Pneumoconioses): A. Anthracosis B. Byssinosis C. Bagassosis D. Silicosis List-II (Occupational Exposures): 1. Textile industry 2. Coal mining 3. Building and construction work 4. Paper industry Codes:

A. A→3 B→2 C→1 D→4
B. A→4 B→1 C→3 D→2
C. A→2 B→1 C→4 D→3 (Correct Answer)
D. A→1 B→4 C→3 D→2

Explanation: ***Correct: A→2 B→1 C→4 D→3*** - This option correctly matches each pneumoconiosis with its primary occupational exposure. - **Anthracosis (A→2)**: Associated with **coal mining** - caused by inhalation of coal dust leading to "black lung disease" - **Byssinosis (B→1)**: Associated with **textile industry** - caused by cotton dust exposure, presents as "Monday fever" - **Bagassosis (C→4)**: Associated with **paper industry** - caused by moldy sugarcane bagasse (fibrous residue) used in paper production - **Silicosis (D→3)**: Associated with **building and construction work** - caused by crystalline silica dust from stone, sand, and concrete *Incorrect: A→3 B→2 C→1 D→4* - Incorrectly matches **Anthracosis** with construction and **Byssinosis** with coal mining - **Byssinosis** is specifically linked to cotton dust in textiles, not coal mining *Incorrect: A→4 B→1 C→3 D→2* - Incorrectly associates **Anthracosis** with paper industry and **Bagassosis** with coal mining - **Anthracosis** results from coal dust, not paper production *Incorrect: A→1 B→4 C→3 D→2* - Incorrectly matches **Anthracosis** with textiles and **Byssinosis** with paper industry - **Anthracosis** is "black lung" from coal, and **Byssinosis** is from cotton dust, not paper

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