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

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

2 / 40

If you are stopped on an incline, how can you start moving without rolling back?

3 / 40

You should decrease to a safe speed before entering a curve and then_____through it.

4 / 40

Why should you test the tractor protection valve?

5 / 40

Overhead inside mirror is used to:

6 / 40

What is always required before loading, driving, or unloading a tanker?

7 / 40

Which two special conditions indicate that you should downshift?

8 / 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?

9 / 40

In what position should the converter dolly air tank drain valve be in for double trailer combination?

10 / 40

With most hazardous materials, you may park within 5 feet of the road briefly, if your work requires it. The materials that are the exception and do not allow parking this close to the road are:

11 / 40

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

12 / 40

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

13 / 40

Which trailer should be the first one after the tractor?

14 / 40

Air tanks should be drained:

15 / 40

Select the true statement about handling triples and doubles:

16 / 40

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

17 / 40

Which trailer is most likely to turn over when you make a sudden turn while pulling doubles?

18 / 40

When checking for_____you are looking for dripping fluids or puddles on the ground below the transmission or engine.

19 / 40

Select the statement that is true in regards to quick steering movements and triple/double trailers:

20 / 40

You should be extra cautious when___while driving a smooth bore tanker combination.

21 / 40

The two other places where the hazardous identification number must appear are:

22 / 40

The method for testing hydraulic brakes for leaks is to _____.

23 / 40

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

24 / 40

What is the most important reason for doing a school bus inspection?

25 / 40

Anti-lock brakes:

26 / 40

You must be alert for road hazards so that:

27 / 40

With Division 1.1, 1.2, or 1.3 Class A or B, how close can you park to a bridge, tunnel, or building?

28 / 40

Where are shut-off valves located?

29 / 40

Select the step that comes first:

30 / 40

While completing the 1st component of the air brake check you are required to fully push down on the foot brake and _____.

31 / 40

A tractor should not be backed under a trailer until the whole air system is:

32 / 40

Alcohol evaporators in some air brake systems help to:

33 / 40

At what "cut out" level does the governor stop pumping air?

34 / 40

If there is no traffic light or attendant, how far from the draw of a drawbridge must you stop?

35 / 40

Liquid surge affects the handling of a tanker by:

36 / 40

Select the true statement in regards to brake drums or discs:

37 / 40

Is it important to look into the back of the fifth wheel to see if the lockpin is locked in?

38 / 40

Animals and human foodstuffs should not be loaded in the same vehicle with?

39 / 40

When using turn signals, which of the following should be avoided?

40 / 40

The sliding mechanism and locking device for a tandem axle on trailers is:

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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.