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

Why should you avoid using the trailer hand valve (trolley valve) to park a combination vehicle?

It will damage the tractor's relay valves It only applies the service brakes, and if air pressure leaks off, the brakes will release It applies the parking springs with too much force, causing compounding It bypasses the low-pressure warning buzzer in the tractor

Correct Answer:

It only applies the service brakes, and if air pressure leaks off, the brakes will release

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