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Home/Practice quizzes/Single-unit air brakes

Single-unit air brakes practice quiz

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Single-unit air brakesQuestion 17 of 200
Correct53%9 of 17 answered
Incorrect47%8 of 17 answered
Labeled S-cam drum foundation-brake diagram
Follow force from the chamber to the drum.

Which sequence correctly describes an S-cam brake application?

AReservoir rotates, governor presses the rotor, spring drains
BBrake drum turns the compressor, then the foot valve closes
CPushrod moves, slack adjuster rotates the S-cam, linings contact the drumYour answerCorrect answer
Correct.

Chamber pushrod movement rotates the slack adjuster and S-cam, forcing the linings against the drum. (Guide p. 149)

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