CDL Combination Vehicles Practice Test 2

Question 1

When backing a combination vehicle, why is it always better to back to the driver's side?

Accepted Answer

You can watch the rear of your trailer through the side window

Answer

Backing to the driver's side lets you see the trailer's position by looking out the side window, while sight-side backing avoids blind-side guesswork.

Question 2

What is offtracking in a combination vehicle?

Accepted Answer

When the rear wheels follow a tighter path than the front wheels in a turn

Answer

Offtracking (cheating) occurs because the rear wheels follow a different, tighter path than the front wheels during a turn, so you must swing wide as needed.

Question 3

To avoid hitting an object on the right when turning a corner with a long combination vehicle, you should:

Accepted Answer

Turn wide as you start the turn

Answer

Keep the rear of the vehicle close to the curb and turn wide only as you complete the turn, so you do not swing into traffic or lose sight of the rear.

Question 4

What does a converter dolly with a single axle and no brakes of its own rely on for stopping?

Accepted Answer

The brakes of the trailers it connects

Answer

A converter dolly is used to connect trailers and its braking is integrated through the air lines of the trailers it couples.

Question 5

Which trailer should be loaded first and placed closest to the tractor in a doubles combination?

Accepted Answer

The heaviest trailer

Answer

The heavier trailer should be in front (closest to the tractor) to improve handling and reduce trailer sway.

CDL Practice Test

CDL Practice Test

CDL Combination Vehicles Practice Test 2