Single-unit air brakes practice quiz

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Single-unit air brakesQuestion 21 of 200

Correct29%6 of 21 answered

Incorrect71%15 of 21 answered

What is the maximum permitted air loss for the single-unit leakage test?

A4 psi every ten secondsYour answer

B3 psi per minute after the initial dropCorrect answer

C10 psi per minute before the brakes are applied

Incorrect.

With spring brakes released, hold a 90 to 100 psi full application for one minute; loss after the initial drop must not exceed 3 psi and no leak should be audible. (Guide p. 221)

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