For the applied-brake leakage test, what does the driver do after making a full brake application?

• A.Pump the pedal rapidly for one minute
• B.Release the brakes and count to sixty
• C.Hold the application, wait for pressure to stabilize, then watch the gauges for one minute with the engine off
• D.Rev the engine to hold pressure steady

Why

Applying the brakes pressurizes chambers and valves that are idle in the static test, exposing a different set of leaks. After the initial drop settles, any further loss in one minute is counted against the applied limit.

Manual topic: Air Brakes - Air Leakage and Brake Tests · From the Air Brakes practice bank (AB-074).

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?
• With the brakes fully applied and the engine off, what is the maximum allowable leakage for a single vehicle?
• With the brakes fully applied and the engine off, what is the maximum allowable leakage for a combination vehicle?