After connecting the converter dolly to the second trailer and before coupling the dolly to the first trailer, what should you verify?

a.That the trailer doors are closed

b.That the dolly fifth wheel is properly coupled to the second trailer kingpin

c.That the cargo is evenly distributed

d.That the parking brake on the tractor is set

Explanation

Before moving the dolly and second trailer into position to couple with the first trailer, you must verify that the dolly fifth wheel is properly locked onto the second trailer kingpin by looking into the back of the fifth wheel.

← Back to Double/Triple Endorsement Test #1

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.

Browse All Free CDL Practice Tests →