Texas DMV CDL General Knowledge Quick Practice Test 4

Texas 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. What is the purpose of a vehicle inspection report?

It tells the motor carrier about problems that may need to be fixed.
It ensures that the vehicle is inspected regularly.
It keeps drivers accountable for inspecting their vehicles.
It provides a plan for the next five trips.

2. In an engine compartment, loose belts will:

Not turn the water pump and/or fan properly, causing the engine to overheat.
Make the engine run more efficiently.
Make the fan run too much, causing the engine to run too coolly.
Last longer than tight belts.

3. If there is a cargo fire in a box trailer:

The trailer doors should be opened.
The trailer doors should not be opened.
A large, heavy blanket should be put over the trailer.

4. Header boards:

Should never be used.
Protect drivers from being hit by cargo.
Protect drivers' heads when they are entering the cab of a truck.

5. What should happen before the air pressure in an air brake system tank falls below 55 psi?

The warning light should activate.
The vehicle will be unable to shift out of gear.
The front lights should flash.

6. A person must be at least ____ to drive a CMV across state lines.

18 years old
21 years old
25 years old

7. An item that is 40 feet long placed on a flatbed trailer should be secured by at least ____ tie-down(s).

One
Two
Three
Four

8. What kind of force must emergency brakes use?

Air pressure
Mechanical
Heavy
Electrical

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