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

This object should be free of shiny treads, rust, free of cracks and distortions.

2 / 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:

3 / 40

A tank trailer should never be fully loaded due to:

4 / 40

If you are required to stop at railroad crossings, you must:

5 / 40

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

6 / 40

If you must stop on the shoulder of the road, you should place warning devices at all of the following places except...

7 / 40

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

8 / 40

What can side to side surge cause?

9 / 40

Why is understanding the loading and unloading procedures so critical?

10 / 40

How do you determine if slack adjusters need to be adjusted?

11 / 40

It takes special care to drive tankers with liquid in them because:

12 / 40

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

13 / 40

What does the amount of liquid you can carry depend on?

14 / 40

Select the true statement about converter dollies:

15 / 40

Drivers who transport route controlled radioactive materials must carry a dated certificate of radioactive materials training. This training must have ocurred within the last:

16 / 40

This object should not have any missing parts, be fully raised, the crank handle is secured, and that there is no damage to the frame.

17 / 40

You should_____when checking the slack adjusters on S-Cam brakes.

18 / 40

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

19 / 40

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

20 / 40

How far before a railroad crossing should you stop your bus?

21 / 40

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

22 / 40

While driving at night, which lights should you use as often as you can?

23 / 40

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

24 / 40

The manual says you should look _____ ahead while driving.

25 / 40

Unless you_____you will feel the effects of a liquid surge.

26 / 40

Select the false statement about tractor protection valves.

27 / 40

You should___when driving down a long steep hill.

28 / 40

This gauge has a governor cut-off.

29 / 40

What should you hear when you have the hand valve on and are testing the trailer brakes by opening the service air line at the back of the trailer?

30 / 40

A trailer is at the right height to have the tractor backed up to it when:

31 / 40

If you are hauling hazardous materials and have ___ tires on your vehicle, you must stop and check them every time you park.

32 / 40

You do not have a hazardous materials endorsement on your commercial driver license. When can you legally haul hazardous materials?

33 / 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?

34 / 40

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

35 / 40

When driving a combination vehicle, the trailer breaks away severing the air lines. The trailer brakes should come on and ____.

36 / 40

How do you check the connection after locking the kingpin into the fifth wheel?

37 / 40

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

38 / 40

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

39 / 40

A commercial motor vehicle (CMV) is defined as:

40 / 40

It has just reached freezing. Which of the following areas is slippery?

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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.