District of Columbia
CDL Practice Test

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Simply because the District of Columbia is the only place in the country that has legal taxation without representation doesn't mean there are no laws at all! Every commercial driver in Washington DC must have a valid commercial driver's license. Typically those licenses will be issued in other jurisdictions but Washington DC can and does issue its own. This online exam will help you practice for the District of Columbia CDL Test. 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.  Good luck!

1 / 40

Select the two things that are important in preventing a rollover:

2 / 40

For what reason do you keep the starter switch key in your pocket during the pre-trip inspection?

3 / 40

Select the statement that best describes what the service line is for.

4 / 40

How far away are you required to park from a bridge, tunnel, or building if you are carrying Division 1.2 or 1.3 materials?

5 / 40

You should back up slowly until____when coupling the trailer.

6 / 40

What kind of surge can occur in a tank with baffles?

7 / 40

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

8 / 40

Should the air pressure in the service air tanks fall below____the driver must be alerted via warning mechanism in the truck cab.

9 / 40

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

10 / 40

The purpose for the emergency air line is:

11 / 40

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

12 / 40

When should the trailer hand valve be used?

13 / 40

Which of the following is something the driver must watch for:

14 / 40

Which of the following is the most important reason for doing a pre-trip inspection?

15 / 40

An emergency escape ramp should be used _____.

16 / 40

Check that the parking brake will hold by____when the parking brake is engaged and the trailer brakes released if not a combination vehicle.

17 / 40

What should you hook up before backing a tractor to a trailer for coupling?

18 / 40

Liquid surge affects the handling of a tanker by:

19 / 40

A commercial motor vehicle (CMV) is defined as:

20 / 40

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

21 / 40

In the slide mechanism of the sliding fifth wheel, this object should have no missing pins or be loose when fully engaged.

22 / 40

To prevent a roll over a driver can 1) keep the cargo as low to the ground as possible and 2) _____.

23 / 40

Do converter dollies have spring brakes?

24 / 40

How often should air tanks be drained?

25 / 40

You should check that the _____are secure, caps are on tight, and is not leaking.

26 / 40

Do you need to stop before a railroad crossing if you are hauling 100 pounds of Division 4.3 materials?

27 / 40

You should place the starter switch key into your pocket while you are performing the pre-trip inspection because:

28 / 40

If you are drowsy, you should _____ before you drive.

29 / 40

Select the purpose of fanning air brakes:

30 / 40

Select the true statement in regards to managing the space to the sides:

31 / 40

You should_____to make an emergency stop with air brakes when using the stab braking method.

32 / 40

Which of the following is a reason that shippers package material?

33 / 40

Select the true statement in regards to the braking power of spring brakes.

34 / 40

What is the most important reason for doing a vehicle inspection?

35 / 40

What is most likely to occur when the front wheels begin to skid?

36 / 40

You should check the_____when loading small tanks equipped with bulkheads.

37 / 40

Select the part that is not a part of the drum brake:

38 / 40

Which of the following statements about downshifting is NOT true?

39 / 40

A shipment described on the Hazardous Waste Manifest may only be delivered to another _______ carrier or treatment facility, who then signs the ______, giving you a copy which you must keep.

40 / 40

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

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How To Get A District of Columbia Commercial Drivers License

In the District of Columbia, there are classifications of motor vehicles that may only be driven by those with a current commercial drivers license. Additionally, there are four classes of endorsements, including school bus, passenger and tanker. Any vehicle with a gross weight rating over 26,000 pounds is considered commercial in the District of Columbia.

Additional endorsements also include:

  • Hazardous Materials
  • Double/Triple Trailer
  • Tanker
  • Passenger
  • School Bus

Requirements to Obtain a District of Columbia CDL:

  • Have a valid non-commercial driver license
  • Meet identity, residency, and good driving history eligibility qualifications
  • Take the applicable CDL knowledge tests
  • Get a CDL learner permit
  • Pass the CDL road skills test

A Commercial Driver in Washington DC is held to a higher standard than drivers of typical passenger or other non-commerical vehicles.  CDL holders must pass both written tests as well as a practical / skills test.  You may practice for the written test using our online CDL test tool above.  Upon successful completion, of the official Washington DC CDL skills test, you will be a fully licensed driver and ready to take to the open road!

Hit the Open Road

District of Columbia CDL License Test Tips

You think you're ready?  Hold on there, Turbo!  Check out these CDL Test Tips before you go zipping to the DMV for your exam!

  1. You must have your CDL learner permit for at least 30 days prior to scheduling your road skills test.
  2. Make an appointment on the DC Online Road Test Appointment Scheduler.  Make sure to have your driver license number handy...you'll need it.
  3. On your test day, arrive 15 minutes early.  You will need to bring a CDL licensed driver aged 21 or older and this person must hold the CDL class and endorsements you are testing for.

You'll need to bring a few other things with you as well.

  • valid CDL learner permit
  • valid NCDL
  • DOT medical certification card
  • an appropriate vehicle in which to complete your CDL test
  • current registration and insurance for the vehicle

If you fail the CDL test you must wait three calendar days before attempting it again.  If you fail a second time, you cannot re-test for ninety days!

Additional Information

Information on the Washington DC Department of Motor Vehicles

The District of Columbia CDL certifying agency is responsible for testing and certifying all commercial drivers. To get more information contact them via:

Website:  https://dmv.dc.gov/service/obtain-commercial-driver-license
Phone:  202.673.6813
Email:  [email protected]

 

Additional Washington DC CDL Helpful Links

Please use the links below to learn more about helpful topics related to the District of Columbia CDL testing program or other CDL-related topics.