4A Power Engineering Unit 4 Introduction to Plant
and Fire Safety 2025/2026 Exam Questions and
Answers | 100% Solved
1. A Class A fire involves:
a) Flammable gases
b) Combustible metals
c) Ordinary combustibles
d) Energized electrical equipment
2. The primary cause of death in most fires is:
a) Burns
b) Structural collapse
c) Smoke and toxic gases
d) Panic
3. A fire requires all of the following EXCEPT:
a) Fuel
b) Oxygen
c) Heat
d) Nitrogen
4. A Class B fire involves:
a) Wood, paper, cloth
b) Flammable liquids and gases
c) Electrical equipment
d) Combustible metals
5. Which portable fire extinguisher is used for a Class C fire?
a) Water
b) Carbon Dioxide (CO2)
c) Foam
d) Dry Chemical (ABC)
6. The acronym "PASS" for fire extinguisher use stands for:
a) Pull, Aim, Squeeze, Sweep
b) Point, Activate, Spray, Stop
,c) Prepare, Alert, Start, Spread
d) Pressure, Align, Switch, Swing
7. A fixed fire protection system that uses pipes and open sprinkler heads is a:
a) Deluge system
b) Wet pipe system
c) Dry pipe system
d) Pre-action system
8. The colour code for a water-type portable fire extinguisher is:
a) Red
b) Blue
c) Green
d) Signal Red (all are red, but content specific)
9. The minimum distance for storing combustible materials from a heat source is usually:
a) 0.5 meters
b) 1 meter
c) 2 meters
d) 3 meters
10. A safe work permit is REQUIRED for:
a) Routine equipment inspection
b) Any hot work in a plant area
c) Using a computer in the office
d) Daily start-up procedures
11. The main purpose of a guard or barrier on machinery is to:
a) Increase productivity
b) Prevent contact with moving parts
c) Reduce noise levels
d) Improve machine appearance
12. LOTO stands for:
a) List Of Tools and Operations
b) Lock Out Tag Out
c) Loss Of Time Off
d) Location Of Tag Out
13. The person who applies a lock and tag on an energy isolating device is:
a) Always the supervisor
,b) The authorized employee who will work on the equipment
c) The safety officer only
d) The first responder
14. Which is NOT a type of energy source that must be isolated during LOTO?
a) Electrical
b) Hydraulic
c) Thermal
d) Sound (unless in specific contexts)
15. A confined space entry permit ensures:
a) The space is cleaned daily
b) Hazards are identified and controlled before entry
c) Only managers can enter
d) Production continues uninterrupted
16. The minimum oxygen concentration for safe entry without an SCBA is generally:
a) 15.5%
b) 19.5%
c) 21.5%
d) 23.5%
17. A hazardous atmosphere in a confined space could be:
a) Oxygen enriched (>23.5%)
b) Flammable gases >10% LEL
c) Toxic gases (e.g., H2S, CO)
d) All of the above
18. The "Danger" safety sign background colour is:
a) Blue
b) Yellow
c) Red
d) Orange
19. The "Caution" safety sign background colour is:
a) Blue
b) Yellow
c) Green
d) Red
, 20. WHMIS 2015 covers:
a) Workplace machinery safety
b) Hazardous products
c) Fire evacuation routes
d) Employee training records
21. A key element of WHMIS is:
a) Safety Data Sheets (SDS)
b) Payroll information
c) Equipment manuals
d) Quality control charts
22. On an SDS, Section 1 identifies:
a) Product and supplier identification
b) Hazard identification
c) Composition/information on ingredients
d) First-aid measures
23. The WHMIS pictogram for flammable materials is:
a) Flame
b) Skull and crossbones
c) Exploding bomb
d) Corrosion
24. Personal Protective Equipment (PPE) is considered:
a) The first line of defense against hazards
b) The most reliable control method
c) The last line of defense
d) Not necessary with good engineering controls
25. Before using a portable ladder, you should:
a) Check for damage or defects
b) Use it as a horizontal platform
c) Place it on unstable footing
d) Exceed its maximum load rating
26. The top of a straight ladder should extend above the landing point by:
a) 0.5 meters
b) 1 meter (3 feet)
and Fire Safety 2025/2026 Exam Questions and
Answers | 100% Solved
1. A Class A fire involves:
a) Flammable gases
b) Combustible metals
c) Ordinary combustibles
d) Energized electrical equipment
2. The primary cause of death in most fires is:
a) Burns
b) Structural collapse
c) Smoke and toxic gases
d) Panic
3. A fire requires all of the following EXCEPT:
a) Fuel
b) Oxygen
c) Heat
d) Nitrogen
4. A Class B fire involves:
a) Wood, paper, cloth
b) Flammable liquids and gases
c) Electrical equipment
d) Combustible metals
5. Which portable fire extinguisher is used for a Class C fire?
a) Water
b) Carbon Dioxide (CO2)
c) Foam
d) Dry Chemical (ABC)
6. The acronym "PASS" for fire extinguisher use stands for:
a) Pull, Aim, Squeeze, Sweep
b) Point, Activate, Spray, Stop
,c) Prepare, Alert, Start, Spread
d) Pressure, Align, Switch, Swing
7. A fixed fire protection system that uses pipes and open sprinkler heads is a:
a) Deluge system
b) Wet pipe system
c) Dry pipe system
d) Pre-action system
8. The colour code for a water-type portable fire extinguisher is:
a) Red
b) Blue
c) Green
d) Signal Red (all are red, but content specific)
9. The minimum distance for storing combustible materials from a heat source is usually:
a) 0.5 meters
b) 1 meter
c) 2 meters
d) 3 meters
10. A safe work permit is REQUIRED for:
a) Routine equipment inspection
b) Any hot work in a plant area
c) Using a computer in the office
d) Daily start-up procedures
11. The main purpose of a guard or barrier on machinery is to:
a) Increase productivity
b) Prevent contact with moving parts
c) Reduce noise levels
d) Improve machine appearance
12. LOTO stands for:
a) List Of Tools and Operations
b) Lock Out Tag Out
c) Loss Of Time Off
d) Location Of Tag Out
13. The person who applies a lock and tag on an energy isolating device is:
a) Always the supervisor
,b) The authorized employee who will work on the equipment
c) The safety officer only
d) The first responder
14. Which is NOT a type of energy source that must be isolated during LOTO?
a) Electrical
b) Hydraulic
c) Thermal
d) Sound (unless in specific contexts)
15. A confined space entry permit ensures:
a) The space is cleaned daily
b) Hazards are identified and controlled before entry
c) Only managers can enter
d) Production continues uninterrupted
16. The minimum oxygen concentration for safe entry without an SCBA is generally:
a) 15.5%
b) 19.5%
c) 21.5%
d) 23.5%
17. A hazardous atmosphere in a confined space could be:
a) Oxygen enriched (>23.5%)
b) Flammable gases >10% LEL
c) Toxic gases (e.g., H2S, CO)
d) All of the above
18. The "Danger" safety sign background colour is:
a) Blue
b) Yellow
c) Red
d) Orange
19. The "Caution" safety sign background colour is:
a) Blue
b) Yellow
c) Green
d) Red
, 20. WHMIS 2015 covers:
a) Workplace machinery safety
b) Hazardous products
c) Fire evacuation routes
d) Employee training records
21. A key element of WHMIS is:
a) Safety Data Sheets (SDS)
b) Payroll information
c) Equipment manuals
d) Quality control charts
22. On an SDS, Section 1 identifies:
a) Product and supplier identification
b) Hazard identification
c) Composition/information on ingredients
d) First-aid measures
23. The WHMIS pictogram for flammable materials is:
a) Flame
b) Skull and crossbones
c) Exploding bomb
d) Corrosion
24. Personal Protective Equipment (PPE) is considered:
a) The first line of defense against hazards
b) The most reliable control method
c) The last line of defense
d) Not necessary with good engineering controls
25. Before using a portable ladder, you should:
a) Check for damage or defects
b) Use it as a horizontal platform
c) Place it on unstable footing
d) Exceed its maximum load rating
26. The top of a straight ladder should extend above the landing point by:
a) 0.5 meters
b) 1 meter (3 feet)
