Alberta Air Brake (Q) Knowledge Test Practice Questions - Alberta Air Brake (Q Endorsement) Knowledge Test Exam - Variant 2

What role can a two-way check valve play in many spring parking brake control circuits?

Drain both service reservoirs at once Supply the parking brake control from whichever service reservoir has higher pressure Change dual tire pressure automatically Measure lining thickness

Correct Answer:

Supply the parking brake control from whichever service reservoir has higher pressure

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