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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 14 of 200
Correct29%4 of 14 answered
Incorrect71%10 of 14 answered

How does the shuttle move inside a blended-air two-way check valve?

AToward the higher-pressure inlet to block it
BAway from the higher-pressure inlet so that pressure reaches deliveryCorrect answer
COnly when both reservoirs are emptyYour answer
DBack and forth at compressor speed
Incorrect.

The free-floating shuttle moves away from the higher-pressure inlet and lets that pressure supply the parking-brake control. (Guide p. 166)

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