Kentucky DMV CDL Air Brakes Quick Practice Test

Kentucky DMV CDL Air Brakes 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.

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Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

1. The parking brake should be:

Used whenever you park your vehicle.
Used while driving.
Set when driving in bad weather.
Removed.

2. If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. The belt should be:

Loosely attached.
Tight.
Cracked.
Frayed.

3. 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

4. Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.

Green
Blue
Yellow

5. If using air tanks with manually operated drains, how often should you drain the tanks?

Every day
Once a week
Once a month
Once every 3,000 miles

6. Some air brake systems use alcohol:

To reduce the risk of ice forming in air brake valves.
To make the compressor run more efficiently.
To lubricate parts of the braking system.
To reduce the risk of rust forming on air brake valves.

7. An alcohol evaporator in an air brake system:

Makes the brakes work without squeaking.
Prevents ice from forming in the braking system.
Lubricates parts of the braking system.

8. What happens if the air pressure in a system's air tanks falls below 60 psi?

A warning light will come on.
The vehicle will not shift out of gear.
The front lights will flash.
The vehicle should stop.

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