Environmental Health and Safety MCQs

1. : The main goal of Environmental Health and Safety (EHS) programs is to:
(A) Increase industrial production
(B) Protect human health, safety, and the environment
(C) Reduce company profits
(D) Eliminate the need for regulations

2. : Which international organization sets guidelines for occupational health and safety?
(A) UNESCO
(B) WHO
(C) ILO
(D) FAO

3. : The Occupational Safety and Health Administration (OSHA) is a regulatory body of:
(A) Pakistan
(B) United Kingdom
(C) United States
(D) Canada

4. : Personal Protective Equipment (PPE) includes:
(A) Helmets, gloves, masks, goggles
(B) Computers and printers
(C) Office chairs and tables
(D) Vehicles and trucks

5. : Which type of pollution is most associated with respiratory diseases?
(A) Soil pollution
(B) Air pollution
(C) Noise pollution
(D) Thermal pollution

6. : Risk assessment in EHS involves:
(A) Ignoring workplace hazards
(B) Identifying and evaluating potential hazards
(C) Focusing only on financial risks
(D) Eliminating inspections

7. : The “Hierarchy of Controls” in occupational safety prioritizes:
(A) PPE over elimination
(B) Administrative controls first
(C) Elimination and substitution of hazards before PPE
(D) Ignoring hazard control

8. : Which of the following is considered a biological hazard?
(A) Extreme temperatures
(B) Bacteria and viruses
(C) Loud machinery
(D) Toxic chemicals

9. : Noise levels above ___ dB can cause permanent hearing loss.
(A) 50 dB
(B) 70 dB
(C) 85 dB
(D) 100 dB

10. : In safety signage, the color red usually indicates:
(A) Mandatory actions
(B) Prohibition or fire-related hazards
(C) General information
(D) Safe condition

11. : The safe drinking water guideline for nitrate (NO₃⁻) set by WHO is:
(A) 50 mg/L
(B) 100 mg/L
(C) 20 mg/L
(D) 5 mg/L

12. : Ergonomics in EHS is concerned with:
(A) Reducing water pollution
(B) Designing workplaces to fit human needs and prevent injuries
(C) Managing hazardous chemicals
(D) Controlling greenhouse gases

13. : The most common cause of workplace accidents is:
(A) Natural disasters
(B) Unsafe acts and unsafe conditions
(C) Earthquakes
(D) Fire only

14. : Which type of fire extinguisher is used for electrical fires?
(A) Water
(B) Foam
(C) CO₂
(D) Sand

15. : Which gas is commonly known as “silent killer” due to its toxicity and lack of odor?
(A) Carbon dioxide
(B) Carbon monoxide
(C) Methane
(D) Ozone

16. : In workplace safety, MSDS stands for:
(A) Material Safety Data Sheet
(B) Management Safety Design System
(C) Mechanical Safety Device Sheet
(D) Multiple Safety Data Source

17. : Which disease is commonly associated with exposure to asbestos?
(A) Asthma
(B) Silicosis
(C) Mesothelioma
(D) Tuberculosis

18. : The precautionary principle in EHS means:
(A) Acting only after hazards are fully proven
(B) Taking preventive action even in the face of scientific uncertainty
(C) Ignoring potential hazards
(D) Waiting for accidents to occur before controlling hazards

19. : Which of the following is a renewable energy option that reduces workplace emissions?
(A) Coal power
(B) Oil refineries
(C) Solar energy
(D) Diesel engines

20. : The process of systematically reducing risks in industrial activities is called:
(A) Risk amplification
(B) Risk mitigation
(C) Risk neglect
(D) Risk escalation

21. : Which international standard provides guidelines for Occupational Health and Safety Management Systems?
(A) ISO 9001
(B) ISO 14001
(C) ISO 45001
(D) ISO 50001

22. : Safe waste disposal is important in EHS because it prevents:
(A) Only soil erosion
(B) Pollution and disease transmission
(C) Increase in production
(D) Water purification

23. : Which of the following is considered a chemical hazard?
(A) Vibration
(B) Noise
(C) Pesticides
(D) Viruses

24. : Emergency response plans in EHS are designed to:
(A) Avoid workplace training
(B) Reduce the impacts of accidents and disasters
(C) Increase hazard exposure
(D) Focus only on profits

25. : The “right to know” in workplace safety refers to:
(A) Workers’ right to access information about hazards they may be exposed to
(B) Employer’s right to hide hazard data
(C) Public’s right to vote
(D) Manager’s right to inspect workers