District of Columbia DMV CDL General Knowledge Quick Practice Test 3

District of Columbia DMV CDL General Knowledge Quick Practice Test 3 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. Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.

10 psi
25 psi
50 psi
100 psi

2. If driving on a surface with poor traction, a driver should accelerate slowly:

Because it is always good to accelerate slowly.
To keep from losing control of the vehicle.
So that they do not accelerate faster than the vehicle ahead.

3. If a traffic light has been green for a long time:

It will probably stay green as you approach.
It is likely broken.
It is likely that the light will soon change to yellow.
It is likely the light will skip yellow and change from green to red.

4. According to a National Sleep Foundation poll, about ____ of people have driven while sleepy.

10 percent
20 percent
60 percent
100 percent

5. When driving, you should stop and take a break ____ to avoid becoming too tired.

Every half hour
Every hour
Every two hours
Every six hours

6. Be sure you are always driving so your vehicle can stop:

Within 10 feet of your current position.
Within 1,000 feet of your current position.
Within your view of the road ahead.
Immediately.

7. If you are driving at a reduced speed in a construction zone when you spot a construction worker near the road, you should:

Speed up.
Stay at your current speed.
Further reduce your speed.

8. If confronted by an aggressive driver, you should:

Keep your vehicle in front of them.
Make eye contact with them
Ignore their gestures.

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