Wisconsin DMV CDL Air Brakes Quick Practice Test

Wisconsin 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. If the safety relief valve in an air brake system is releasing air:

You should not be concerned as this is a normal process.
There is something wrong with the brakes.
The valve is operational.

2. When traveling down a steep downgrade, the best way to use your brakes is to:

Ride the brakes all the way down the hill.
Apply the brakes for a few seconds, then release the brakes for a few seconds. Continue to repeat these steps as you travel down the hill.
Apply the brakes only near the bottom of the downgrade.
Apply consistent pressure to the brake pedal all the way down the hill.

3. What color malfunction lamps do vehicles equipped with ABS have?

Green
Yellow
Blue

4. What can happen if the air pressure gets too low in an air brake system?

The brakes may squeak.
The brakes may not work.
The brakes may be sluggish.
The brakes will be very sensitive.

5. Which of the following is not part of a vehicle’s air brake system?

Air gauges
Low pressure warning device
Air filter

6. Air tank drains should:

Only be used by mechanics.
Only be used when it is wet outside.
Be used to drain the tanks completely.

7. In a vehicle with dual air brakes, what happens if one system is low on pressure?

The air from the other system will be used to supplement the system with the low pressure.
The front or rear brakes may not work properly.
All brakes will be inoperable.
The low system will use an auxiliary system to fill the tank.

8. Rollovers are most likely to happen when:

Drivers turn too fast.
Driver turn too slowly.
It is windy.
It is raining.

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