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

Which of the following about the front tires on a commercial bus is true?

2 / 40

You should____in order to inspect the coupling.

3 / 40

The trailer should be lowered so that _____.

4 / 40

You may use DANGEROUS placards instead of separate placards for each Table 2 hazard class when:

5 / 40

Select the action that is not recommended when driving on slippery roads:

6 / 40

When should you avoid using the parking brake?

7 / 40

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

8 / 40

A disruptive passenger:

9 / 40

This item should not be rusted, bent, or damaged and centered over evenly spaced tires and dual wheels.

10 / 40

Which of the following materials would be an acceptable floor liner for moving Division 1.1 or 1.2 materials?

11 / 40

The best way to describe a dual air brake system is:

12 / 40

Air brake systems should not lose air faster than____when testing for air leakage rates in combination vehicles before applying the brake pedal.

13 / 40

Alcohol evaporators in some air brake systems help to:

14 / 40

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

15 / 40

If you must stop on the shoulder of the road, you should place warning devices at all of the following places except...

16 / 40

Select the true statement in regards to the center of gravity for tanks:

17 / 40

Select the two reasons as to why special care is needed when driving a tank vehicle:

18 / 40

You should expect____when backing a tractor under a trailer.

19 / 40

Select what you should do before leaving the vehicle unattended:

20 / 40

When you have a major leak in the service line and you apply pressure to the brakes, the service air pressure will escape and:

21 / 40

You should_____when the low pressure warning is activated:

22 / 40

What are you checking when looking at the lubrication level on a dipstick?

23 / 40

What does the amount of liquid allowed in the tank depend on?

24 / 40

You don't want to use wheel chocks when hooking a combination to a second trailer with no spring brakes. What should you do?

25 / 40

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

26 / 40

Tires should should be replaced:

27 / 40

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

28 / 40

How do you test the trailer service brakes?

29 / 40

The safety valve is usually set to open at:

30 / 40

The purpose for the emergency air line is:

31 / 40

Double and triple trailers should be driven with care to avoid a rollover or jacknife.

32 / 40

What position should the heaviest trailer be in when pulling 3 trailers?

33 / 40

You should have the fifth wheel plate greased as recommened because:

34 / 40

What are some of the important parts in the steering system?

35 / 40

Select the factors that can cause your brakes to fade or fail:

36 / 40

The object that doesn't get checked at the side of the trailer is the:

37 / 40

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

38 / 40

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

39 / 40

Why should you use chocks when parking a trailer without spring brakes?

40 / 40

What does the service brake system do?

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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.