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

Under what condition will the spring brakes typically apply automatically?

When system pressure rises above 150 psi (1,035 kPa) When system pressure drops to between 20 and 45 psi (138 to 310 kPa) When the vehicle exceeds 100 km/h on a downhill grade Whenever the driver activates the engine retarder switch

Correct Answer:

When system pressure drops to between 20 and 45 psi (138 to 310 kPa)

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