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

What must a Class 1 driver do before coupling a tractor to a semi-trailer?

Check that the trailer's landing gear is fully raised Ensure the trailer wheels are securely blocked (chocked) Release the tractor parking brakes Uncouple the air lines

Correct Answer:

Ensure the trailer wheels are securely blocked (chocked)

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