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

Which two special conditions indicate that you should downshift?

2 / 40

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

3 / 40

How do you hook a combination to a second trailer without spring brakes and without using wheel chocks?

4 / 40

Select the statement that is true in regards to what is required of a driver with a double or triple trailers:

5 / 40

Start by___when coupling.

6 / 40

If your engine runs a pump used during delivery of compressed gas, should you turn off the engine before or after unhooking hoses after delivery?

7 / 40

Why does it take special skills to haul a tank vehicle?

8 / 40

When would you lock some emergency roof hatches in a partly open position?

9 / 40

Unless you_____you will feel the effects of a liquid surge.

10 / 40

Tankers used to transport hazardous materials on vehicles must be marked with:

11 / 40

To find out if a shipment includes a hazardous material, you should:

12 / 40

What might happen if you swing wide to the left before you turn right?

13 / 40

Select the true statement about dual air brake systems.

14 / 40

Where are the two main places where the hazardous material identification number appears?

15 / 40

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

16 / 40

Where is compressed air stored?

17 / 40

You must have placards for explosives, poison gas or flammables exceeding:

18 / 40

The minimum tread depth for tires other than the front tires is ____.

19 / 40

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

20 / 40

Select the statement that is not part of the air-brake system:

21 / 40

What is the best way to see the sides and rear of your vehicle?

22 / 40

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

23 / 40

Overhead inside mirror is used to:

24 / 40

How should the pintle hook be when backing a dolly under the second trailer?

25 / 40

In what position should the shut off valves on a the rear of the front trailer be in on a set of double trailers?

26 / 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:

27 / 40

How should the hand valve be used?

28 / 40

While driving on a clear night with low beam headlights, you should be able to stop within:

29 / 40

Why should you cover cargo?

30 / 40

This should be cleaned and then adjusted properly while inside the cab.

31 / 40

An oncoming vehicle keeps its high beams on. You should deal with this hazard by:

32 / 40

Which of the following will confirm that you are driving with anti-lock brakes?

33 / 40

What are slack adjusters?

34 / 40

Bus drivers must have a commercial driver license if they drive a vehicle designed to seat more than:

35 / 40

The interlock system for the brake and accelerator on a transit coach may be used:

36 / 40

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

37 / 40

To maintain alertness during the trip, drivers should:

38 / 40

The gauge that needs to come up to normal levels after starting the engine within a few seconds is _____.

39 / 40

____is what can legally hold the parking brake or emergency brake in position for a bus, truck, or truck tractor.

40 / 40

What gauge on the dashboard indicates electrical system charging rate?

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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.