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

Bus drivers must have a CDL if they drive a vehicle:

2 / 40

A safe haven is:

3 / 40

After deciding the type of evacuation that is necessary, the next step you must take is:

4 / 40

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

5 / 40

At around____the governor allows the air compressor to start pumping again:

6 / 40

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

7 / 40

If you work for an interstate carrier:

8 / 40

____is the most common type of foundation brakes used by heavy vehicles.

9 / 40

The transport index of a radioactive material:

10 / 40

Start by___when coupling.

11 / 40

In what location must you keep your shipping papers which describe any hazardous materials?

12 / 40

There should be ___space between the upper and lower fifth wheel after coupling.

13 / 40

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

14 / 40

Select the true statement about emergency brakes:

15 / 40

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

16 / 40

You must be alert for road hazards so that:

17 / 40

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

18 / 40

When stopping for railroad tracks, you must stop no closer than how many feet before the nearest track?

19 / 40

Spring brakes are usually held back by_____during normal driving.

20 / 40

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

21 / 40

The safety catch for the fifth wheel locking lever must be ____ for a coupling to be complete.

22 / 40

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

23 / 40

In what position should the converter dolly air tank drain valves and pintle hook be in?

24 / 40

Why should you test the tractor protection valve?

25 / 40

On a bus, you may sometimes haul small-arms ammunition, emergency shipments of drugs, or hospital supplies. The total weight of all such hazardous materials must not be greater than:

26 / 40

Which seats must have a seat belt:

27 / 40

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

28 / 40

What can side to side surge cause?

29 / 40

You are inspecting the_____when looking for broken welds, cracks, holes, or other damage to the longitudinal frame member, cross members, box, and floor.

30 / 40

The most dangerous time during the school bus ride is:

31 / 40

What placards, if any, do you need if your load includes 20 pounds of Division 2.3 gas and 1,001 pounds of flammable gas?

32 / 40

Select what you should not do when coupling the glad hands.

33 / 40

The blind spot behind the bus could extend to how many feet?

34 / 40

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

35 / 40

You should make sure the_____before backing under a trailer.

36 / 40

You should keep a minimum of ____between another vehicle and the double trailer with 100 ft truck driving at 30 mph.

37 / 40

Buses may NOT have recapped or regrooved tires:

38 / 40

You should_____when the low pressure warning is activated:

39 / 40

You should look into the back of the fifth wheel on a dolly to see if it is locked onto the kingpin.

40 / 40

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

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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.