Free CDL Quiz

What happens during a trailer skid?

a.The tractor drive wheels lose traction and slide sideways
b.The trailer wheels lock up and the trailer swings around toward the tractor
c.The front wheels of the tractor lose steering control
d.The engine stalls while the vehicle is in motion

Explanation

During a trailer skid, the trailer wheels lock up and the trailer swings sideways, potentially pushing the tractor forward or to the side. This is usually caused by excessive braking or braking on slippery surfaces.

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About the CDL Exam

The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.

This question is from the CDL Combination Test #1 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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