District of Columbia
CDL Practice Test

1

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

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.

2 / 40

Air pressure should build___with a dual air system.

3 / 40

Select the true statement:

4 / 40

When conducting a pre-trip inspection, the most important item to verify is _____.

5 / 40

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

6 / 40

How do you know when your brakes are fading?

7 / 40

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

8 / 40

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

9 / 40

What action should you take before driving while drowsy?

10 / 40

You need to be extra careful when driving smooth bore tanks:

11 / 40

How do you make sure the air lines are not crossed and the trailer brakes are working after supplying air to the trailer?

12 / 40

When accelerating:

13 / 40

What should you do before you begin to couple?

14 / 40

Select the true statement about converter dollies:

15 / 40

Select why you should not use the trailer hand valve while driving:

16 / 40

Select the true statement about retest markings:

17 / 40

What is most likely to occur when driving a tanker truck and the front wheels begin to skid?

18 / 40

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

19 / 40

Select the statement of what you should not do if you are required to drive through flowing water or deep puddles.

20 / 40

To test the security of the tractor semi trailer connection you should:

21 / 40

Select the true statement in regards to your brake function when your ABS fails

22 / 40

You must first______to supply air to the trailer.

23 / 40

The system that needs to be checked for signs of leaks with rust or carbon soot and damage is the _____.

24 / 40

The air leakage rate for combination vehicles should not be more than _ psi a minute.

25 / 40

Select the purpose of fanning air brakes:

26 / 40

Which of the following answers lists the three types of emergency equipment you must have on your bus?

27 / 40

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

28 / 40

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

29 / 40

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

30 / 40

The bolst, brackets, or bushings that attach the air bag and/or spring to the vehicle and axle frame are _____.

31 / 40

Which of these statements about speed management and braking is true?

32 / 40

Signs of distracted drivers include:

33 / 40

On tandem axle for trailers, the sliding mechanism and locking device is:

34 / 40

Who is responsible for certifying on the bills of lading that the hazardous materials are prepared properly?

35 / 40

To inspect the______you should pump the pedal 3 times and hold it down for 5 seconds while making sure the pedal doesn't move during those 5 seconds.

36 / 40

Select the factor that has no effect on how much liquid you can carry:

37 / 40

A leak rate for a straight truck or bus air brake system should not exceed _____psi per minute when the engine is off and the brakes are released.

38 / 40

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

39 / 40

Suspension systems:

40 / 40

Why should you use chocks when parking a trailer without spring brakes?

Your score is

The average score is 70%

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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.