FREE Vermont CDL Combination Test 2024 (Practice Test)

1. If you cannot make a right turn without entering another traffic lane, you should:

turn wide before you start the turn.
turn wide as you complete the turn.
swing wide to the left before starting the turn.

2. A red triangle with an orange center means:

Slow-moving vehicle
The vehicle is hauling hazardous materials
Law enforcement vehicle

3. You are driving on a steep downgrade in the proper low gear. Your "safe" speed is 40 mph. When your speed reaches 40 mph, you should:

apply the brakes to gradually reduce your speed to 35 mph, and then release the brakes.
increase your speed to approximately 45 mph, and then apply release the brakes.
apply the brakes to quickly reduce your speed to 25 mph, and then release the brakes.

4. If your truck has automatic transmission, you should downshift:

when going down grades.
after entering a curve.
whenever road conditions allow.

5. Air brakes use ________ to make the brakes work.

6. If your vehicle has dummy couplers, why should you use them when the air lines are not connected to a trailer?

To prevent water and dirt from getting into the coupler and the air lines.
Because if you don't, you will never build system pressure.
To prevent overheating.

7. If the ABS is not working:

the vehicle will have weak brakes.
you still have normal brake functions.
the vehicle will have no brakes.

8. The trailer hand valve should be used only:

to test the trailer brakes.
when the trailer is fully loaded.
in driving to prevent skids.

9. Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:

monitor your tractor and trailer as you slow down, and if it is safe to do so, back off the brakes to stay in control.
brake the same way, regardless of whether you have ABS on the tractor, the trailer, or both.
drive slower to keep your vehicle in a straight line.

10. Which of the following is NOT part of testing the trailer service brakes?

Releasing the parking brakes.
Moving the vehicle forward slowly.
Pushing in the trailer air supply knob.

VT CDL COMBINATION TEST - PRACTICE TEST