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Single-unit air brakes practice quiz

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Single-unit air brakesQuestion 9 of 200
Correct44%4 of 9 answered
Incorrect56%5 of 9 answered

What do automatic reservoir drain valves do?

AIntermittently expel accumulated contaminationCorrect answer
BHold the service brakes applied
CReplace the governorYour answer
Incorrect.

Automatic drains, sometimes called spitter valves, periodically expel collected water and contaminants. (Guide p. 182)

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