Air Brake (Q Endorsement) Practice · Question
When performing an applied leakage test on a combination vehicle, what is the maximum acceptable air loss rate per minute with the engine off and brakes applied?
For a combination vehicle, Canadian standards permit an air loss of no more than 9 psi per minute during an applied leakage test, with the engine off and brakes
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Question: When performing an applied leakage test on a combination vehicle, what is the maximum acceptable air loss rate per minute with the engine off and brakes applied?
Answer options:
- Not more than 5 psi in one minute.
- Not more than 7 psi in one minute.
- Not more than 3 psi in one minute. ✅ Not more than 9 psi in one minute.
Correct answer: Not more than 9 psi in one minute.
Explanation: For a combination vehicle, Canadian standards permit an air loss of no more than 9 psi per minute during an applied leakage test, with the engine off and brakes fully applied.
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