When uncoupling twin trailers, what should you do before disconnecting the converter dolly from the first trailer?

a.Park on a downhill grade

b.Lower the dolly landing gear and disconnect safety chains

c.Raise the dolly landing gear

d.Release all trailer brakes

Explanation

Before disconnecting the converter dolly from the first trailer, you must lower the dolly landing gear to support the dolly and second trailer, then disconnect the safety chains and air and electrical lines from the first trailer.

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Related Questions

In a triple trailer combination, how much more can the last trailer swing compared to the first trailer during a sudden lane change?When coupling twin trailers, which trailer should be positioned closest to the tractor?Converter dollies built after March 1, 1998 are required to have what safety feature?Where is the ABS malfunction lamp located on a converter dolly built after March 1, 1998?What is the term for the phenomenon where the last trailer in a combination vehicle swings out more than the front trailer during sudden steering movements?

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 Double/Triple Endorsement Test #1 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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