Home › CDL Practice Tests › General Knowledge Questions › Question 200
What minimum extinguisher rating must the required fire extinguisher on a commercial vehicle carry?
- A.A rating of 1 A only
- B.No rating is required if the unit looks full
- C.Any rating, including unrated household units
- D.An Underwriters Laboratories rating of 5 B:C or more, or two extinguishers each rated 4 B:C or more
Correct answer
D. An Underwriters Laboratories rating of 5 B:C or more, or two extinguishers each rated 4 B:C or more
Why
The rule sets both the agent type and the size: one unit rated 5 B:C or higher, or two smaller units rated 4 B:C or higher. Checking the gauge and the inspection tag during the pre-trip is how you know that rating will actually be delivered.
Manual topic: Fire - Equipment Standards · From the General Knowledge practice bank (GK-200).