Fire Safety Fire Prevention and Hazard Identification 4 — Questions and Answers
Question 1: Which housekeeping practice is most effective at preventing fires in a workplace?
- Storing all chemicals together in one room
- Keeping combustible materials away from heat sources (Correct answer)
- Using extension cords as permanent wiring
- Blocking fire exits with storage boxes
Correct answer: Keeping combustible materials away from heat sources
Keeping combustible materials separated from heat sources removes a key component of the fire triangle and is a fundamental fire prevention practice.
Question 2: What does the term 'flash point' refer to when discussing flammable liquids?
- The temperature at which a liquid spontaneously ignites
- The lowest temperature at which a liquid produces enough vapor to ignite (Correct answer)
- The point at which a liquid turns to gas
- The maximum temperature a container can safely hold a liquid
Correct answer: The lowest temperature at which a liquid produces enough vapor to ignite
Flash point is the lowest temperature at which a flammable liquid gives off enough vapor to form an ignitable mixture near its surface.
Question 3: A 'Class K' fire extinguisher is specifically designed for which type of fire?
- Electrical equipment fires
- Combustible metal fires
- Cooking oils and fats fires (Correct answer)
- Ordinary combustible materials
Correct answer: Cooking oils and fats fires
Class K extinguishers use a wet chemical agent designed to suppress fires involving cooking oils and animal fats, common in commercial kitchens.
Question 4: Which of the following is an example of a 'hot work' hazard that could ignite a fire?
- Using a computer near a window
- Welding near combustible materials (Correct answer)
- Operating a refrigerator in a storage room
- Running electrical cables under carpet
Correct answer: Welding near combustible materials
Hot work such as welding, cutting, and grinding produces sparks and heat that can easily ignite nearby combustible materials.
Question 5: What is the primary purpose of a fire watch during and after hot work operations?
- To document the work being performed
- To monitor for sparks or smoldering materials that could start a fire (Correct answer)
- To ensure workers take adequate breaks
- To verify the work complies with building codes
Correct answer: To monitor for sparks or smoldering materials that could start a fire
A fire watch monitors the work area for sparks, embers, or smoldering materials that could ignite a fire during or after hot work is completed.
Question 6: Which storage practice significantly increases fire risk in a warehouse?
- Keeping aisles clear between storage racks
- Stacking combustible materials flush against sprinkler heads (Correct answer)
- Using approved metal storage cabinets for flammables
- Maintaining 18 inches of clearance below sprinklers
Correct answer: Stacking combustible materials flush against sprinkler heads
Stacking materials against or blocking sprinkler heads prevents the water from distributing properly and can render the fire suppression system ineffective.
Question 7: What is the danger of mixing bleach (sodium hypochlorite) with ammonia-based cleaners?
- It creates a non-flammable gas that displaces oxygen
- It produces toxic chloramine vapors that can also pose ignition risks (Correct answer)
- It neutralizes both chemicals making them harmless
- It creates an extremely cold reaction that can freeze pipes
Correct answer: It produces toxic chloramine vapors that can also pose ignition risks
Mixing bleach and ammonia produces toxic chloramine gases, which are hazardous to breathe and can contribute to fire and explosion risks in confined spaces.
Fire Safety Fire Prevention and Hazard Identification 4
Which housekeeping practice is most effective at preventing fires in a workplace?