Free CDL Quiz

What is a converter dolly?

a.A device that converts air brakes to hydraulic brakes
b.A coupling device with one or two axles and a fifth wheel used to connect a semi-trailer as a full trailer in a double or triple combination
c.A tool for adjusting the fifth wheel height
d.A device that converts a single trailer into a tandem

Explanation

A converter dolly is a coupling device with one or two axles and its own fifth wheel. It is used to attach a semi-trailer as the second or third trailer in a double or triple combination. The dolly connects to the rear of the trailer in front.

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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?What is the trailer apron?Why is the fifth wheel greased?

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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