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

You should check your mirrors while making a lane change:

2 / 40

If there is not a sight glass to check the oil level you are required to look for leaks around the _____.

3 / 40

Is it mandatory that all vehicles with air brakes have low air pressure warning signals?

4 / 40

You should_____when checking the slack adjusters on S-Cam brakes.

5 / 40

Operating a motor vehicle with the intent of doing harm to others or physically assaulting a driver or their vehicle is known as?

6 / 40

Which of the following types of emergency equipment must you have on your bus?

7 / 40

Which signals may be used to warn of a stopped vehicle that contains explosives?

8 / 40

What does outage mean?

9 / 40

While completing the 3rd component of the air brake check of a combination vehicle, at what psi should the tracor protection valve and parking brake valve should pop out?

10 / 40

Which of the following is not a prohibited practice on the bus:

11 / 40

Select the factor that has no effect on how much liquid you can carry:

12 / 40

To avoid rollover when going through a curve, the best thing to do is:

13 / 40

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

14 / 40

Overhead inside mirror is used to:

15 / 40

This object should not be spliced, cut, chafed, or worn through to allow steel braid to show.

16 / 40

Select the true statement in regards to converter dollies:

17 / 40

How often should you check your cargo?

18 / 40

Upon what does the amount of liquid you can carry in a load depend?

19 / 40

Rods, connecting links, and arms from the steering box to the wheel are a part of the:

20 / 40

This object should be checked to make sure that the cap(s) are on tight, that it is secure, and there are no leaks.

21 / 40

The best way to test if the spring brakes come on automatically is to:

22 / 40

Select the answer that is not a part of the braking process when driving a tractor-trailer combination vehicle that has ABS:

23 / 40

You are required to have a tank endorsement when transporting:

24 / 40

You must control how far packages labeled "Radioactive II" or "Radioactive III" are located from people and cargo space walls by referring to:

25 / 40

Select the true statement in regards to brake drums:

26 / 40

Where are shut-off valves located?

27 / 40

Select the true statement in regards to a converter dolly:

28 / 40

Before pulling away, make sure the landing gear of the trailer is:

29 / 40

Placarded vehicles must carry which type of fire extinguisher?

30 / 40

Hazardous materials (that are not forbidden) carried on a bus must be:

31 / 40

Select the true statement about slack adjusters:

32 / 40

Cylinders containing compressed gases may only be loaded onto a vehicle without a flat floor or platform if the cylinders are:

33 / 40

Most states require school bus drivers to take a physical examination:

34 / 40

While completing the 1st component of the air brake check you are required to fully push down on the foot brake and _____.

35 / 40

When arriving at the destination announce:

36 / 40

Front wheel brakes are good under what kind of conditions?

37 / 40

What is the stopping distance for a tractor trailer that is traveling at 55 mph on dry pavement?

38 / 40

Class A explosives must not be transported in a combination vehicle if the vehicle includes:

39 / 40

The amount of liquid you can carry depends on:

40 / 40

How do you supply air to the trailer tanks?

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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.