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

What do pressure-protection valves often do for non-essential air accessories?

Increase accessory demand whenever brakes are applied Replace reservoir drain valves Cut off accessory air if pressure drops, preserving service brake air Supply only cab climate-control air permanently

Correct Answer:

Cut off accessory air if pressure drops, preserving service brake air

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