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Home/Practice quizzes/Single-unit air brakes

Single-unit air brakes practice quiz

Choose an answer, read the explanation, then continue to the next question. Your results include a review of every answer.

Single-unit air brakesQuestion 22 of 200
Correct32%7 of 22 answered
Incorrect68%15 of 22 answered

How is governor cut-in checked on a single-unit truck?

ADrain to zero and wait for the safety valve.
BPump to about 80 percent of maximum, pause and confirm pressure begins rising before it falls below 80 psi.Correct answer
CHold the parking brake at full application pressure.Your answer
Incorrect.

Pump pressure down to about 80 percent of maximum and verify the compressor cuts in before pressure is below 80 psi. (Guide p. 218)

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Study aid only. These are not official ICBC exam questions, and practice scores do not predict an official test result.