Free F01 Fire Classification & Extinguishers Questions and Answers 1 — Questions and Answers
Question 1: A fire involving ordinary combustibles such as wood, paper, and cloth is classified as:
- Class A (Correct answer)
- Class B
- Class C
- Class D
Correct answer: Class A
Class A fires are the most common type and involve solid combustible materials like wood, paper, fabric, and plastics. Water or water-based agents are typically the most effective extinguishing agents for Class A fires.
Question 2: What does the acronym P.A.S.S. stand for in the context of operating a portable fire extinguisher?
- Push, Aim, Spray, Secure
- Pull, Aim, Squeeze, Sweep (Correct answer)
- Point, Activate, Spray, Stop
- Pull, Assess, Squeeze, Spray
Correct answer: Pull, Aim, Squeeze, Sweep
P.A.S.S. is a simple acronym to help remember the four basic steps for using a fire extinguisher. It stands for Pull the pin, Aim the nozzle at the base of the fire, Squeeze the handle, and Sweep the nozzle from side to side.
Question 3: A fire in an electrical panel is considered which class of fire?
- Class A
- Class B
- Class C (Correct answer)
- Class K
Correct answer: Class C
Class C fires involve energized electrical equipment. The primary concern is the danger of electric shock, so a non-conductive extinguishing agent, such as carbon dioxide (CO2) or a dry chemical agent, must be used.
Question 4: Which type of fire extinguisher is specifically designed for fires in commercial kitchens involving cooking oils and fats?
- Water extinguisher
- Carbon Dioxide (CO2) extinguisher
- Class K extinguisher (Correct answer)
- Dry Powder extinguisher for metals
Correct answer: Class K extinguisher
Class K fires involve high-temperature cooking oils, greases, or fats. Class K extinguishers use a wet chemical agent that creates a soapy foam blanket to smother the fire and cool the oils below their ignition temperature.
Question 5: A fire involving flammable liquids like gasoline, oil, or paint is classified as:
- Class A
- Class B (Correct answer)
- Class C
- Class D
Correct answer: Class B
Class B fires involve flammable or combustible liquids, gases, and greases. Extinguishing these fires requires an agent that smothers the fire by cutting off its oxygen supply, such as dry chemical, CO2, or foam.
Question 6: Why should a water-based extinguisher NEVER be used on a Class C fire?
- Water will make the fire hotter
- It can cause a dangerous chemical reaction
- It creates a severe risk of electric shock (Correct answer)
- The water will evaporate before reaching the fire
Correct answer: It creates a severe risk of electric shock
Class C fires involve energized electrical equipment. Since water is an excellent conductor of electricity, using a water-based extinguisher on a Class C fire can cause the electricity to travel up the water stream, creating a severe risk of electrocution for the operator.
Free F01 Fire Classification & Extinguishers Questions and Answers 1
A fire involving ordinary combustibles such as wood, paper, and cloth is classified as: