Saskatchewan Air Brake Practice Questions - Saskatchewan Air Brake (Endorsement A) Exam

What is the primary purpose of the trailer supply line?

To carry control signals from the tractor foot valve to the trailer relay valve To supply continuous air pressure from the tractor to charge the trailer reservoirs To vent excess moisture from the trailer service chambers To connect the electrical anti-lock braking system between units

Correct Answer:

To supply continuous air pressure from the tractor to charge the trailer reservoirs

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