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

When checking the brake drums during a pre-trip inspection, what is a sign of a critical defect?

The brake drums are painted black Cracks that extend more than half the width of the friction surface or any crack that goes completely through the drum A light layer of rust on the outer edge of the drum The drum is cool to the touch before the trip starts

Correct Answer:

Cracks that extend more than half the width of the friction surface or any crack that goes completely through the drum

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