Single-unit air brakes practice quiz

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Single-unit air brakesQuestion 21 of 200

Correct24%5 of 21 answered

Incorrect76%16 of 21 answered

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

A4 psi every ten seconds

B3 psi per minute after the initial dropCorrect answer

C10 psi per minute before the brakes are appliedYour answer

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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