Home › CDL Practice Tests › General Knowledge Questions › Question 212
For a fire involving a load of ordinary paper and wood (Class A), which agent choice is suitable that would be a poor choice on a fuel fire?
- A.Water is best for every class of fire
- B.Foam must never touch paper products
- C.Dry chemical cannot be used on Class A fires
- D.Water can cool and soak Class A materials, while on fuel it can spread the burning liquid
Correct answer
D. Water can cool and soak Class A materials, while on fuel it can spread the burning liquid
Why
Class A fires are fought by cooling and soaking the material, which water does well. On a pool of burning fuel, water sinks under the fuel and spreads it, which is exactly why matching the agent to the class matters.
Manual topic: Fire - Fire Classes · From the General Knowledge practice bank (GK-212).