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

Why is the proper adjustment and use of all mirrors so vital to the safe operation of the school bus?

2 / 40

You should____in order to inspect the coupling.

3 / 40

At a railroad crossing, the bus is required to stop at the stop line. If there is no clearly marked stop line, what is the required minimum and maximum stopping distance?

4 / 40

Play of the steering wheel should not exceed:

5 / 40

In the event of an accident you should remember to do the following EXCEPT:

6 / 40

Select the true statement in regards to empty trucks:

7 / 40

What action should you take if there is no phone available and you discover your hazardous materials shipment leaking at a rest stop?

8 / 40

Which of the following types of cargo can never be carrier on a bus with riders?

9 / 40

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

10 / 40

A leak rate for a straight truck or bus air brake system should not exceed _____psi per minute when the engine is off and the brakes are released.

11 / 40

The emergency air line is used to:

12 / 40

Select the correct description for a bulkhead tank.

13 / 40

Buses are prohibited from carrying all of the following hazardous materials except:

14 / 40

If your bus has an emergency exit door, it must:

15 / 40

Where are the two main places where the hazardous material identification number appears?

16 / 40

Be careful to check the_____when unloading the smaller tanks of bulk heads.

17 / 40

Placarded vehicles must carry which type of fire extinguisher?

18 / 40

When transporting both hazardous and non hazardous materials, your bills must:

19 / 40

With Division 1.2 or 1.3 Explosive B, how close to the travelled part of the roadway can you park?

20 / 40

Which trailer is more likely to roll over when pulling 3 trailers?

21 / 40

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

22 / 40

A commercial motor vehicle (CMV) is defined as:

23 / 40

What will happen right away should the service air line come apart but the emergency line is intact while driving a combination vehicle?

24 / 40

An "A/W" the first column of the hazardous materials table means:

25 / 40

Why is understanding the loading and unloading procedures so critical?

26 / 40

Air tanks need to be drained:

27 / 40

Commerical vehicles typically have this type of brake.

28 / 40

If your engine runs a pump used during delivery of compressed gas, should you turn off the engine before or after unhooking hoses after delivery?

29 / 40

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

30 / 40

Do empty trucks have the best braking?

31 / 40

Do converter dollies have spring brakes?

32 / 40

Drivers placard their vehicle to _____ the risk.

33 / 40

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

34 / 40

When accelerating:

35 / 40

When is it acceptable for non-hazardous materials to be described by hazard class words or identification numbers?

36 / 40

An emergency escape ramp should be used _____.

37 / 40

How do you check the connection after locking the kingpin into the fifth wheel?

38 / 40

Select the true statement in regards to a converter dolly:

39 / 40

The _____of the kingpin has the locking jaw close around it.

40 / 40

Select the portion of the combination vehicle that is most likely to turn over suddenly when pulling a double trailer:

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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.