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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 3 of 200
Correct67%2 of 3 answered
Incorrect33%1 of 3 answered

At roughly what pressures may spring brakes begin dragging and then fully apply automatically?

AThey never apply automatically.
BThey may drag near 60 psi and fully apply around 20 to 45 psi.Your answerCorrect answer
CThey drag only above 150 psi and apply at 125 psi.
Correct.

Spring brakes may begin to drag below about 60 psi and may fully apply between 20 and 45 psi. (Guide p. 162)

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