Fire Safety Fire Extinguisher Types and Usage 1 — Questions and Answers
Question 1: Which fire extinguisher class is designed specifically for fires involving flammable liquids such as gasoline and oil?
- Class A
- Class B (Correct answer)
- Class C
- Class D
Correct answer: Class B
Class B fire extinguishers are rated for flammable and combustible liquid fires, including gasoline, oil, and grease.
Question 2: What does the PASS acronym stand for when using a fire extinguisher?
- Pull, Aim, Squeeze, Sweep (Correct answer)
- Push, Activate, Spray, Stop
- Pull, Apply, Shoot, Spread
- Point, Aim, Start, Spray
Correct answer: Pull, Aim, Squeeze, Sweep
PASS stands for Pull the pin, Aim at the base, Squeeze the handle, and Sweep side to side.
Question 3: A Class C fire extinguisher is appropriate for which type of fire?
- Wood and paper fires
- Flammable liquid fires
- Electrical equipment fires (Correct answer)
- Metal fires
Correct answer: Electrical equipment fires
Class C extinguishers are rated for fires involving energized electrical equipment, where a non-conductive agent is essential.
Question 4: Where should you aim the nozzle of a fire extinguisher when fighting a fire?
- At the top of the flames
- At the base of the fire (Correct answer)
- Into the center of the smoke
- Above the fire source
Correct answer: At the base of the fire
Aiming at the base of the fire attacks the fuel source, which is the most effective way to extinguish it.
Question 5: How often should portable fire extinguishers be inspected in a commercial building according to NFPA 10?
- Once a year
- Every 5 years
- Monthly (Correct answer)
- Every 6 months
Correct answer: Monthly
NFPA 10 requires monthly visual inspections of portable fire extinguishers to ensure they are charged and accessible.
Question 6: Which type of extinguishing agent is used in a Class K fire extinguisher?
- Dry chemical powder
- Carbon dioxide
- Wet chemical solution (Correct answer)
- Water mist
Correct answer: Wet chemical solution
Class K extinguishers use a wet chemical agent specifically formulated to combat high-temperature cooking oil and fat fires.
Fire Safety Fire Extinguisher Types and Usage 1
Which fire extinguisher class is designed specifically for fires involving flammable liquids such as gasoline and oil?