Free CRST Fire Prevention and Protection Questions and Answers — Questions and Answers
Question 1: Which are the four components of the fire tetrahedron?
- Fuel, Heat, Oxygen, and a Chemical Chain Reaction (Correct answer)
- Combustibles, Ignition, Air, and Water
- Wood, Flame, Nitrogen, and Carbon Dioxide
- Fuel, Spark, Pressure, and Smoke
Correct answer: Fuel, Heat, Oxygen, and a Chemical Chain Reaction
The fire tetrahedron model illustrates the four elements required for a fire to start and be sustained: fuel, heat, oxygen, and an uninhibited chemical chain reaction. Removing any one of these elements will extinguish the fire.
Question 2: A fire involving energized electrical equipment should be fought with which class of fire extinguisher?
- Class A
- Class B
- Class C (Correct answer)
- Class D
Correct answer: Class C
Class C fire extinguishers are designed for use on fires involving energized electrical equipment. They use non-conductive extinguishing agents, such as carbon dioxide or dry chemical, which prevent the risk of electric shock to the operator.
Question 3: When using a portable fire extinguisher, the acronym P.A.S.S. is a helpful reminder of the steps. What does the 'A' stand for?
- Activate the alarm
- Assess the situation
- Aim at the base of the fire (Correct answer)
- Alert others in the area
Correct answer: Aim at the base of the fire
The P.A.S.S. method stands for Pull the pin, Aim the nozzle at the base of the fire, Squeeze the handle, and Sweep from side to side. Aiming at the base is crucial because it directs the extinguishing agent at the fuel source, not the flames.
Question 4: Which of the following is an example of an administrative control for fire prevention?
- Installing a fire sprinkler system.
- Implementing a hot work permit system. (Correct answer)
- Storing flammable liquids in a fire-rated cabinet.
- Constructing firewalls between building sections.
Correct answer: Implementing a hot work permit system.
Administrative controls are work practices or procedures that reduce the risk of a hazard. A hot work permit system is a formal procedure that ensures necessary precautions are taken before, during, and after activities like welding or cutting that can create ignition sources.
Question 5: What is the most critical requirement for a designated emergency egress route?
- It must be well-lit with natural light.
- It must be monitored by a security camera.
- It must be kept clear and unobstructed at all times. (Correct answer)
- It must be at least 3 meters wide.
Correct answer: It must be kept clear and unobstructed at all times.
An egress route is useless if it cannot be accessed or traversed during an emergency. Therefore, the most critical requirement is that it remains clear, unlocked, and completely unobstructed at all times to allow for a quick and safe exit.
Question 6: The primary function of an automatic fire sprinkler system is to:
- Alert the fire department automatically.
- Completely extinguish any fire, regardless of size.
- Release a chemical agent to absorb smoke.
- Control the fire's spread and provide time for evacuation. (Correct answer)
Correct answer: Control the fire's spread and provide time for evacuation.
While a sprinkler system can sometimes extinguish a small fire, its main design purpose is to control the fire's growth and spread. This control limits heat and smoke production, providing occupants with more time to evacuate safely and preventing a small fire from becoming catastrophic.
Free CRST Fire Prevention and Protection Questions and Answers
Which are the four components of the fire tetrahedron?