A combination vehicle loses 2 psi in one minute with the brakes released. Does it meet the standard?

• A.No, combinations must lose zero air
• B.No, the combination released limit is 1 psi
• C.It cannot be judged without driving first
• D.Yes. It is within the 3 psi per minute released-brake limit for combinations

Why

Two psi sits comfortably inside the combination static limit of 3 psi per minute. The driver should still note any audible leak, but the measured rate itself passes.

Manual topic: Air Brakes - Air Leakage and Brake Tests · From the Air Brakes practice bank (AB-084).

Practice this subject as a full test

More Leakage Rate Standards & Air Tests questions

• For the static leakage test, what are the starting conditions?
• With the engine off and brakes released, what is the maximum allowable leakage rate for a single vehicle?
• With the engine off and brakes released, what is the maximum allowable leakage rate for a combination vehicle?
• For the applied-brake leakage test, what does the driver do after making a full brake application?
• With the brakes fully applied and the engine off, what is the maximum allowable leakage for a single vehicle?