california
CDL Practice Test

1

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_____when an emergency requires you to quickly stop your tanker.

2 / 40

For Division 1.1 or 1.2 Explosives A, should the floor liner required be stainless steel?

3 / 40

Which of the following statements about "Radioactive" labels is true?

4 / 40

The most stable tanker shape is:

5 / 40

The amount of liquid you can carry depends on:

6 / 40

When driving in very hot temperatures, you should:

7 / 40

The best way to have control on curves is:

8 / 40

A tank vehicle:

9 / 40

Your bus starts to lean toward the outside on a banked curve, you are:

10 / 40

What are the liquid tight separations between compartments inside tanks called?

11 / 40

School buses are one of the safest means of transportation. What two key factors contribute to this impressive safety record?

12 / 40

Five hazard classes that require placarding in any amount are ______.

13 / 40

What are the dividers that are inside tankers that have an opening at the bottom and top?

14 / 40

How much space should there be between the lower and upper fifth wheel?

15 / 40

______is a device that connects the service and emergency air lines between the tractor and trailer.

16 / 40

You should___to reduce the air leakage rate.

17 / 40

Select the first action to do when the low air pressure warning comes on:

18 / 40

Which of the following is a key steering component?

19 / 40

Select the vehicle that off-tracks the most.

20 / 40

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

21 / 40

What are slack adjusters?

22 / 40

This item does not need to be checked during the cab check.

23 / 40

When this item is missing or loose, movement may occur between the fifth wheel assembly and the frame.

24 / 40

A commercial motor vehicle (CMV) is defined as:

25 / 40

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

26 / 40

This gauge will indicate if the generator or alternator is charging:

27 / 40

What is the standee line?

28 / 40

What do you check when doing a visual inspection of the coupling?

29 / 40

The bolst, brackets, or bushings that attach the air bag and/or spring to the vehicle and axle frame are _____.

30 / 40

A driver of a tank vehicle should take curves, off ramps, and on ramps at a speed lower than the posted speed limit.

31 / 40

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

32 / 40

Select when you should use the hand valve to park a combination vehicle.

33 / 40

The transport index of a radioactive material:

34 / 40

A bus has a GVWR of 22,000 pounds and seats 24 passengers. What CDL class is this vehicle?

35 / 40

Which of the following statements about overhead space is true?

36 / 40

What do you need to do to supply air to the air tanks of the second trailer?

37 / 40

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

38 / 40

Select the true statement in regards to stopping distance and speed:

39 / 40

The compressor is connected to the engine via _____?

40 / 40

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

Your score is

The average score is 65%

5/5 - (2 votes)

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.