North Dakota DMV CDL Combination Quick Practice Test

North Dakota DMV CDL Combination Quick Practice Test For 2024

CDL Class A, B or C. Complete CDL driver training course. All the questions in this test are from the official DMV written exam. You can use our free online tests to evaluate how likely you are to pass the official DMV test. Or you can just cut to the chase and increase your chances of passing by upgrading to Premium Membership and unlock official DMV tests. In addition, you will also receive a master cheat sheet which contains all your state’s DMV questions and answers. Premium membership also unlocks a smart tracker which keeps an inventory of all incorrectly answered questions for easy, fast and effective revision. Practice with our free tests or hit Upgrade button below for premium access and increase your chances of passing your DMV written exam.

99.5% Pass Rate

Get Access To Official DMV Online Tests & A Master Cheat Sheet With All Questions & Answers For Your State. 99.5% Pass Rate Guaranteed!

Upgrade To Premium

Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

1. A trolley valve:

Should be used while driving.
Should only be used to test trailer brakes.
Should be used when parking uphill.

2. Which type of vehicle is most prone to the “crack-the-whip” effect?

A five-axle tractor semi-trailer
A three-axle tractor semi-trailer
A bobtail tractor
A triple trailer

3. What is the Johnson bar?

A hand valve that works the trailer brakes
A valve that indicates the fuel level
A valve that measures the amount of liquid in the air brake system
A valve that allows for the release of excess pressure in the braking system

4. What does the tractor protection valve do?

Protects the tractor from being stolen
Protects the tractor from exceeding a set speed
Keeps air in the braking system, should the trailer break away or develop a leak
Ensures oil adequately lubricates the engine

5. If unsure if a trailer is equipped with ABS, you can:

Check under the trailer for wheel speed sensors coming from the back of the brakes.
Try driving on a slippery surface and see if ABS kicks in.
Assume it does have ABS.
Remove a tire and look for the ABS sensor on the axle.

6. To help prevent a rollover, cargo should be:

Placed as high as possible inside the trailer.
Placed as low as possible inside the trailer.
Placed on the passenger side of the trailer.
Placed on the driver’s side of the trailer.

7. Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:

The trailer will stop normally.
The trailer will not have brakes.
The trailer will speed up.

8. When coupling a trailer:

Make sure to couple matching glad hands.
Any glad hand can be connected to any other glad hand.
It is best to leave one glad hand unattached.
Only one set of glad hands should be connected.

Page 1 of 3