Free CDL Quiz

What is the trailer apron?

a.The mud flap behind the trailer wheels
b.The bottom plate of the trailer front that rests on the fifth wheel
c.The cover over the trailer air tanks
d.The painted area around the trailer doors

Explanation

The trailer apron is the flat metal plate on the underside of the trailer front that rests on and slides across the fifth wheel. It should be inspected for damage and should be smooth to allow proper coupling movement.

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Related Questions

What is the upper fifth wheel?What is the lower fifth wheel?What is the release handle on a fifth wheel used for?Why is the fifth wheel greased?When backing under the trailer during coupling, what speed should you use?

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 #2 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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