california
CDL Practice Test

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This site is designed to help aspiring commercial drivers practice for their State of California Department of Motor Vehicles CDL test. You can take these free California CDL practice tests as many times as you would like. Questions on these tests come from the various commercial driver license topics that are represented in the California CDL handbook. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the "Start Test" button below to begin.

1 / 40

Commerical vehicles typically have this type of brake.

2 / 40

Within 3 minutes, this gauge pressure should build to 90 psi from 50 psi.

3 / 40

_____ create a little above 90 degree angle between the adjuster arm and push rod when the brakes are released and no less than 90 degrees when the brakes are applied.

4 / 40

How often should you check the cargo you are transporting?

5 / 40

The best way to go into a curve is to decrease your speed going into the curve and then ____going through it.

6 / 40

Some school busses are marked with the LNG placard. What does LNG stand for?

7 / 40

You should expect____when backing a tractor under a trailer.

8 / 40

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

9 / 40

This object should not move more than an inch by pulled by hand with the brakes released for manual slack adjusters.

10 / 40

What is the normal operating range for a truck's oil pressure?

11 / 40

A driver that hauls hazardous materials must attend training every:

12 / 40

What do you do first during step 3 of starting the engine and inspecting the inside of the cab?

13 / 40

Overhead inside mirror is used to:

14 / 40

You should_____to uncouple the converter dolly.

15 / 40

The cause of almost half of all truck driver deaths are:

16 / 40

The best way to have control on curves is:

17 / 40

What school bus accidents should be reported?

18 / 40

What method should be used to test that the air is flowing to all the trailers?

19 / 40

Which of these statements about speed management and braking is true?

20 / 40

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

21 / 40

What does the service brake system do?

22 / 40

Select the statement that is true in regards to quick steering movements and triple/double trailers:

23 / 40

The minimum tire tread depth for front tires is:

24 / 40

Check to ensure that____when inspecting the coupling.

25 / 40

In the event of a tire failure you should...

26 / 40

Front wheel brakes are good under what kind of conditions?

27 / 40

When driving on a clear night with the vehicle lights on, your speed should be such that you can stop within _____.

28 / 40

When driving with multiple trailers, which one should be right behind the tractor?

29 / 40

What is the purpose of a driver placarding his or her vehicle?

30 / 40

Select the true statement in regards to driving a truck with triple or double trailers:

31 / 40

When must a driver’s inspection report be completed?

32 / 40

You need to raise the landing gear just to the height of where it clears the pavement before driving.

33 / 40

When you discharge an unruly passenger, you must choose a place that is:

34 / 40

If you do become sleepy while driving, you should _____.

35 / 40

Another term for a smooth bore tank is:

36 / 40

You should____to check the free play of manual slack adjusters on S-Cam brakes.

37 / 40

When should you drain air tanks that do not have an automatic tank drain?

38 / 40

A vehicle placarded for Division 1.1, 1.2, or 1.3 explosives:

39 / 40

While driving on a clear night with low beam headlights, you should be able to stop within:

40 / 40

Surge affects the handling of a tanker by:

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CDL Category Practice Tests

CDL Practice Test

How To Get A california Commercial Drivers License

Residents of California may apply for their CDL at the age of 18 years old. These residents may only drive within the California state borders and are not eligible for driving hazmat vehicles. Residents over the age of 21 are eligible for interstate commerce and may receive their Hazmat Certification. All residents must undergo a medical examination by an approved Medical Examiner. The examiner will provide the individual with a Medical Examiner’s Certificate that will show their physical ability to be eligible to operate a commercial vehicle.

Any drivers who falls into the following categories are disqualified from receiving their commercial driver’s license.

  • Convicted of driving a commercial vehicle impaired in the past two years.
  • Having multiple driver’s license.
  • Having a revoked, denied, canceled, or suspended driver’s license.
  • Being disqualified from obtaining CDL driving privileges in another state.

Applicants for a California CDL must complete a vision test at the time of their application, along with one or more knowledge tests and a practical skills test.

Endorsements
S – School Bus
N – Tank
P – Passenger
H – Hazardous Materials
X – Hazmat and Tank Combination
P – Passenger Vehicle

Hit the Open Road

California CDL License Test Tips

Knowledge tests are required to be passed by all California residents seeking a commercial driver’s license. Class A applicants are required to complete a 70 question assessment regarding both general commercial driving knowledge and combination driving. Class B and C applicants are required to pass a 50 question assessment about general commercial driving knowledge. Those seeking endorsements or the removal of the Air Brake restriction will have to take additional knowledge tests. Each endorsement has a 20 to 30 question assessment based on the topic of the endorsement. All knowledge tests must be passed for the resident to receive their CDL. A passing score is receiving an 80 percent or higher on the assessment. Each applicant is responsible for showcasing their ability to operate a commercial vehicle as part of the CDL skills test. There are three main parts to this test which include the on-road test, pre-trip inspection, and basic control skills test. Applicants must pass all three parts to receive their commercial driver’s license.

Additional Information

Information on the California Department of Motor Vehicles

The State of California Department of Motor Vehicles regulates the certifying and testing of commercial drivers in the California. To get more information contact them via:

Website:  https://www.dmv.ca.gov/portal/dmv/detail/commercial/commercial

Phone:  800.777.0133

 

Additional California CDL Helpful Links

Please use the links below to access more valuable California CDL testing resources and to learn more about practice driving tests for the state of California.