Home › CDL Practice Tests › General Knowledge Questions › Question 211
What does the pressure gauge on a stored-pressure extinguisher tell you during a pre-trip check?
- A.How many fires the unit has fought
- B.Whether the unit still holds enough pressure to discharge properly, shown by the needle in the green zone
- C.The exact weight of the agent left
- D.Whether the extinguisher matches the cargo color
Correct answer
B. Whether the unit still holds enough pressure to discharge properly, shown by the needle in the green zone
Why
A needle in the red, a broken seal, or a missing pin all mean the extinguisher may fail in the one moment it is needed. The gauge check takes seconds and belongs with the rest of the emergency equipment check.
Manual topic: Fire - Equipment Checks · From the General Knowledge practice bank (GK-211).