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

What is the purpose of 'glad hands' in a tractor-trailer connection?

They lock the trailer doors They are the couplers that connect the service and emergency air lines from the tractor to the trailer They are electrical connectors for the anti-lock braking system (ABS) They assist the driver in climbing into the tractor cab

Correct Answer:

They are the couplers that connect the service and emergency air lines from the tractor to the trailer

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