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Home/Practice quizzes/Class 3

Class 3 practice quiz

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Class 3Question 13 of 200
Correct38%5 of 13 answered
Incorrect62%8 of 13 answered

During the Class 3 air-brake pre-trip, how quickly must pressure build from 50 to 90 psi at fast idle?

AWithin five minutes
BWithin one minute
CWithin three minutesYour answerCorrect answer
Correct.

Air pressure must build from 50 to 90 psi within three minutes at a fast idle of about 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.