Louisiana DMV CDL General Knowledge Quick Practice Test 4

Louisiana DMV CDL General Knowledge Quick Practice Test 4 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. Bent lock rings:

Are acceptable.
Are not a concern in dry weather.
Are dangerous.
Can lengthen tire life.

2. If mirrors are dirty before starting a trip:

They will likely become clean after driving a short distance.
It should not be a concern.
They should be cleaned before the vehicle is driven.

3. During the on-road driving test, you should:

Develop your own route to show off your driving skills.
Listen to directions from the examiner.
Bring a passenger to ride with you.
Drive in an unsafe manner.

4. What happens when a vehicle hydroplanes?

The tires lose contact with the road.
The tires have extra traction.
The vehicle is easier to control.
The vehicle becomes heavier.

5. If approaching a railroad crossing that is being approached by a train, you should:

Try to cross the tracks quickly.
Drive around any lowered gates.
Stop and wait for the train to pass before beginning across the tracks.

6. What can happen if a parking brake is used in very wet weather when temperatures are below freezing?

The brakes will squeak.
The brakes may freeze so the vehicle cannot move.
The brakes may suddenly release by themselves.
The brakes may explode.

7. You will often have to drive your vehicle under bridges and overpasses. If approaching such an opening, you should:

Assume the posted clearance height is accurate.
Assume the posted clearance height is inaccurate.
Measure the height of the opening before proceeding.

8. What does the air compressor governor do?

Controls when the air compressor pumps air into the air storage tanks.
Controls how quickly air leaves the air storage tanks.
Controls the temperature of the air entering the air storage tanks.
Controls the temperature of the air leaving the air storage tanks.

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