CIRS CIRS Occupational Health & Industrial Hazards 1 — Questions and Answers
Question 1: What is the primary focus of OSHA's General Industry Standard 29 CFR 1910 in the United States?
- Establishing mandatory workplace safety and health regulations to protect general industry workers from recognized hazards (Correct answer)
- Regulating environmental pollution and waste disposal from industrial facilities
- Setting workers' compensation premium rates for industrial employers
- Managing employee retirement and health insurance benefit programs
Correct answer: Establishing mandatory workplace safety and health regulations to protect general industry workers from recognized hazards
OSHA's 29 CFR 1910 establishes comprehensive safety and health standards for general industry employers, covering hazards from machinery and chemicals to emergency action plans.
Question 2: Which occupational exposure is causally linked to mesothelioma, a cancer of the pleural and peritoneal lining?
- Asbestos fiber inhalation in construction, insulation, and shipbuilding industries (Correct answer)
- Lead dust ingestion in battery manufacturing and painting
- Crystalline silica dust in mining and sandblasting operations
- Benzene vapor exposure in petrochemical and rubber industries
Correct answer: Asbestos fiber inhalation in construction, insulation, and shipbuilding industries
Mesothelioma is almost exclusively caused by prior occupational inhalation of asbestos fibers, with a latency period of 20–50 years between exposure and disease onset.
Question 3: In the hierarchy of hazard controls used in occupational health, which method is considered most effective?
- Elimination — physically removing the hazard from the workplace (Correct answer)
- Personal protective equipment worn by individual workers
- Administrative controls such as work rotation and safe work procedures
- Engineering controls that enclose or isolate the hazard source
Correct answer: Elimination — physically removing the hazard from the workplace
The hierarchy ranks elimination as most effective because physically removing the hazard provides complete protection, unlike controls that merely reduce or manage ongoing exposure.
Question 4: What does OSHA's 'Permissible Exposure Limit' (PEL) represent for airborne chemical hazards?
- The maximum allowable concentration of a substance workers may be exposed to during an 8-hour time-weighted average workday (Correct answer)
- The minimum concentration at which a chemical produces any detectable health effect
- The threshold above which workers must receive immediate workers' compensation
- The average exposure concentration across all workers in a facility on a given day
Correct answer: The maximum allowable concentration of a substance workers may be exposed to during an 8-hour time-weighted average workday
PELs are legally enforceable OSHA standards that set the maximum airborne chemical concentration permissible over an 8-hour TWA to prevent adverse health effects from occupational exposures.
Question 5: Which occupational lung disease is caused by chronic inhalation of crystalline silica dust and characterized by progressive pulmonary fibrosis?
- Silicosis, common in mining, sandblasting, and construction workers (Correct answer)
- Asbestosis, caused by asbestos fiber accumulation in lung tissue
- Byssinosis, associated with cotton and textile dust inhalation
- Anthracosis, resulting from long-term coal dust accumulation
Correct answer: Silicosis, common in mining, sandblasting, and construction workers
Silicosis is a fibrotic lung disease caused by inhaling free crystalline silica particles, leading to inflammation, scarring, and progressive loss of lung function with no cure.
Question 6: What is the primary purpose of a Safety Data Sheet (SDS) in industrial workplaces under OSHA's Hazard Communication Standard?
- To provide comprehensive information on chemical hazards, safe handling, storage, first aid, and emergency procedures (Correct answer)
- To record facility-wide workplace injury and illness statistics for OSHA reporting
- To document individual workers' compensation claims and medical treatment costs
- To list employee participation records for required safety training programs
Correct answer: To provide comprehensive information on chemical hazards, safe handling, storage, first aid, and emergency procedures
SDS documents provide standardized hazard information for specific chemicals, enabling workers and emergency responders to understand risks and take appropriate protective measures as required by OSHA's HazCom Standard.
CIRS CIRS Occupational Health & Industrial Hazards 1
What is the primary focus of OSHA's General Industry Standard 29 CFR 1910 in the United States?