Home › CDL Practice Tests › Air Brakes Questions › Question 83
A single vehicle loses 3 psi in one minute with the brakes released. Does it meet the standard?
- A.Yes, because 3 psi is the single-vehicle released limit
- B.No. The released-brake limit for a single vehicle is 2 psi per minute, so 3 psi is a failure
- C.Yes, if the loss stops in the second minute
- D.Yes, single vehicles have no released limit
Correct answer
B. No. The released-brake limit for a single vehicle is 2 psi per minute, so 3 psi is a failure
Why
Keeping the two single-vehicle numbers straight matters: 2 psi released and 3 psi applied. Mixing them up would pass a truck that the standard says must be repaired.
Manual topic: Air Brakes - Air Leakage and Brake Tests · From the Air Brakes practice bank (AB-083).