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

In a combination vehicle, why must you never couple a tractor fifth wheel to a kingpin that is bent or loose?

It will void the trailer's tire warranty It can lead to a mechanical failure of the coupler, causing the trailer to detach from the tractor during travel It makes the vehicle run out of fuel faster It prevents the radio from working

Correct Answer:

It can lead to a mechanical failure of the coupler, causing the trailer to detach from the tractor during travel

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