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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 9 of 200
Correct22%2 of 9 answered
Incorrect78%7 of 9 answered

What occurs during the compressor intake stroke?

AThe governor opens the safety valve at 150 psi.
BThe piston moves down, pressure falls and air enters through the open inlet valve.Correct answer
CThe piston rises, both valves close and air leaves the reservoir.Your answer
Incorrect.

On the intake stroke, the descending piston creates lower pressure and air enters through the inlet valve. (Guide p. 151)

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