Free CDL Quiz

What should you inspect on the coupling system for a combination vehicle?

a.Only the paint on the fifth wheel
b.Fifth wheel plate, locking jaws, kingpin, air and electrical lines, and safety chains or devices
c.Only the trailer brakes
d.Coupling inspection is not needed

Explanation

The coupling system inspection for combination vehicles includes checking the fifth wheel plate for damage and grease, locking jaws for secure engagement around the kingpin, air and electrical lines for damage, and safety chains or latch devices.

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

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