CDL General
Knowledge Test


This is the Commercial Vehicle Driver's License Test covering General Knowledge.  You will be presented with 40 questions and you must answer 34 questions correctly to pass.  There is no time limit.  You may not go back once you answer a question.  Click the "Start Test" button below to begin.  Good luck!

1 / 40

Your vehicle is going down a long hill and your brakes begin to fail. What should you do?

2 / 40

Which of the following is the most important reason for doing a pre-trip inspection?

3 / 40

When stopped on a divided highway where should your reflectors be placed?

4 / 40

What are the three types of emergency equipment that you must have with your vehicle?

5 / 40

The act of operating a motor vehicle in a selfish, bold, or pushy manner, without regard for the rights or safety of others is known as.

6 / 40

You should check your tires every ____ or every ____ when driving in very hot weather.

7 / 40

How can you determine if your vehicle is equipped with ABS?

8 / 40

Which of the following is NOT a basic step to be taken at a crash scene?

9 / 40

Which of the following should you NOT do if you experience a tire failure?

10 / 40

Suspension systems:

11 / 40

What is the first thing to do if your vehicle catches fire while driving?

12 / 40

What is the correct number of red reflective triangles that you should carry?

13 / 40

If you are stopped on an incline, how can you start moving without rolling back?

14 / 40

Which of the following are possible causes of tire fires?

15 / 40

When accelerating:

16 / 40

Always try to back toward the driver's side because

17 / 40

Where should you place your warning devices if you must stop on a one-way or divided highway?

18 / 40

How often should you check your cargo?

19 / 40

You are driving a 40 foot truck at 35 MPH, how much space (in seconds) should you keep in front of you?

20 / 40

Which of the following statements about stopping distances is NOT true?

21 / 40

Shifting into a lower gear and removing your foot off of the accelerator to slow your vehicle is known as?

22 / 40

The minimum tread depth for tires other than the front tires is ____.

23 / 40

What can you do at an accident site to help avoid another accident?

24 / 40

Which of the following would NOT be part of a standard vehicle inspection?

25 / 40

Which of the following statements about downshifting is NOT true?

26 / 40

It has just reached freezing. Which of the following areas is slippery?

27 / 40

With the controlled braking method, you _____?

28 / 40

Wet brakes can cause _____.

29 / 40

When backing your vehicle, which of the following is NOT recommended

30 / 40

For any flatbed load you must have at least ____ tie downs.

31 / 40

Two causes of tire fires are ______.

32 / 40

If you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?

33 / 40

Which of the following are some suspension system defects?

34 / 40

The most important hand signal you should agree on with a helper is:

35 / 40

To transport cargo safely, which of these are you NOT responsible for?

36 / 40

What is NOT one of the four skill areas that operating a commercial vehicle requires?

37 / 40

Your vehicle is going down a long hill and your brakes begin to fail. What should you do?

38 / 40

Which of the following is NOT an important reason to look far ahead when you are driving?

39 / 40

While driving at night, which lights should you use as often as you can?

40 / 40

If you are drowsy, you should _____ before you drive.

Your score is

The average score is 80%

4.6/5 - (9 votes)

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