4A (A4) Introduction to Plant and Fire Safety Exam Questions with Verified Answers Latest
Update 2025-2026
The extiguishing medium for a class "D" fire is: - Answers Dry Powder.
During an injury related investigation by an Occupational Health and Safety officer, work being
done at the site may be suspended:
A) indefinitely
B) until the officer arrives at the scene
C) for a maximum of 48 hours
D) long enough to attend to the victim
E) until any serious safety hazards are corrected - Answers E) until any serious safety hazards
are corrected
Individual responsibilities for health and safety must be borne by: - Answers All personnel in a
work place.
If an area contains hazardous concentrations of flammable gases or vapours under normal
operating conditions, electrical equipment must be designed for use in the area. This is
designated as: - Answers Class 1.
A safe work permit for cold work is intended for: - Answers Work that will usually not cause a
fire.
A class "A" fire would invole: - Answers Wood or coal.
The valve cap on a gas cylinder: - Answers Protects the cylinder valve from damage.
To prevent the formation of explosive mixtures, oxygen and acetylene cylinders should be: -
Answers Stored in seperate areas.
What is the first step in eliminating hazards in an energy plant? - Answers Identify the hazards.
The type of fire extinguisher usually used on a live electrical fire is a/an: - Answers Carbon
Dioxide extinguisher.
Fire pumps usually start automatically with a signal from: - Answers Fire main pressure.
Which is a function of a joint health and safety committee? - Answers Deal with safety concerns
of the workers.
All maintenance on portable fire extinguishers must be: - Answers Contracted out to a certified
service company.
Update 2025-2026
The extiguishing medium for a class "D" fire is: - Answers Dry Powder.
During an injury related investigation by an Occupational Health and Safety officer, work being
done at the site may be suspended:
A) indefinitely
B) until the officer arrives at the scene
C) for a maximum of 48 hours
D) long enough to attend to the victim
E) until any serious safety hazards are corrected - Answers E) until any serious safety hazards
are corrected
Individual responsibilities for health and safety must be borne by: - Answers All personnel in a
work place.
If an area contains hazardous concentrations of flammable gases or vapours under normal
operating conditions, electrical equipment must be designed for use in the area. This is
designated as: - Answers Class 1.
A safe work permit for cold work is intended for: - Answers Work that will usually not cause a
fire.
A class "A" fire would invole: - Answers Wood or coal.
The valve cap on a gas cylinder: - Answers Protects the cylinder valve from damage.
To prevent the formation of explosive mixtures, oxygen and acetylene cylinders should be: -
Answers Stored in seperate areas.
What is the first step in eliminating hazards in an energy plant? - Answers Identify the hazards.
The type of fire extinguisher usually used on a live electrical fire is a/an: - Answers Carbon
Dioxide extinguisher.
Fire pumps usually start automatically with a signal from: - Answers Fire main pressure.
Which is a function of a joint health and safety committee? - Answers Deal with safety concerns
of the workers.
All maintenance on portable fire extinguishers must be: - Answers Contracted out to a certified
service company.
