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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 7 of 200
Correct14%1 of 7 answered
Incorrect86%6 of 7 answered

After pumping the single-unit system below 50 psi, what build-up test must it pass?

A20 to 45 psi within ten minutes with the engine off
B90 to 150 psi in 30 seconds at idle
C50 to 90 psi within three minutes at 1,000 to 1,200 rpmYour answerCorrect answer
Correct.

Rebuild from 50 to 90 psi within three minutes at a fast idle of 1,000 to 1,200 rpm. (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.