SGI Class 1 Practice Questions - Saskatchewan Class 1 Commercial Driver Licence Written Exam

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When checking the air loss rate in a Class 1 vehicle with the engine off, the parking brakes released, and the service brakes fully applied, what is the maximum acceptable leakage rate?

No more than 4 psi (28 kPa) per minute for a tractor-trailer combination No more than 10 psi (70 kPa) per minute Zero leakage is allowed under any circumstances No more than 1 psi per minute

Correct Answer:

No more than 4 psi (28 kPa) per minute for a tractor-trailer combination

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