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Home/Practice quizzes/Class 3

Class 3 practice quiz

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

Class 3Question 13 of 200
Correct77%10 of 13 answered
Incorrect23%3 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 minutesYour answer
BWithin one minute
CWithin three minutesCorrect answer
Incorrect.

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.