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

What do one-way check valves do between the supply reservoir and service reservoirs?

Allow air to fill service reservoirs while preventing backflow after certain upstream failures Reduce tire pressure automatically Replace daily reservoir draining Apply the trailer hand valve

Correct Answer:

Allow air to fill service reservoirs while preventing backflow after certain upstream failures

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