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

How often should you check the cargo you are transporting?

2 / 40

Why are you required to take an exam about air brakes?

3 / 40

After coupling with a trailer, what position should the front trailer supports be in before driving away?

4 / 40

The direction of liquid movement not prevented by baffles is:

5 / 40

How can you check slack adjusters?

6 / 40

Which of the following statements about bus evacuation is true?

7 / 40

An emergency escape ramp should be used _____.

8 / 40

There are 2 reasons as to why hauling liquids take special care. One reason is the ___center of gravity.

9 / 40

One reason hauling liquids in tank vehciles require special care is:

10 / 40

A commercial motor vehicle (CMV) is defined as:

11 / 40

Select which is not a mandatory emergency equipment:

12 / 40

Select the action that is not appropriate when driving on slippery roads:

13 / 40

Which is more likely to tip over due to the crack the whip effect?

14 / 40

Select the answer that is controlled by the foot brake.

15 / 40

Which of the following is NOT a basic step to be taken at a crash scene?

16 / 40

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

17 / 40

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

18 / 40

Why should you cover cargo?

19 / 40

You should turn off your engine when loading flammable liquid unless:

20 / 40

A disruptive passenger:

21 / 40

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

22 / 40

Select the true statement in regards to brake drums:

23 / 40

If there is not a sight glass to check the oil level you are required to look for leaks around the _____.

24 / 40

What are the 3 methods for securing a second trailer before coupling?

25 / 40

How do you make sure the trailer height is correct before coupling?

26 / 40

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

27 / 40

A drawbridge does not have a traffic light showing green or a traffic control attendant. How many feet before the draw of a bridge must a bus driver stop?

28 / 40

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

29 / 40

Water is drained from the compressed air tanks because:

30 / 40

How do you know when your brakes are fading?

31 / 40

Buses may NOT have recapped or regrooved tires:

32 / 40

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

33 / 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?

34 / 40

When should you avoid using the parking brake?

35 / 40

Secure baggage and freight in ways that avoid damage and:

36 / 40

Cylinders containing compressed gases may only be loaded onto a vehicle without a flat floor or platform if the cylinders are:

37 / 40

What does the drain valve for air tanks remove?

38 / 40

When not towing a trailer, why should the tractor glad hands be locked?

39 / 40

By law, the warning lights must only be used when approaching a:

40 / 40

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

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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.