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

Select when you should use the hand valve to park a combination vehicle.

2 / 40

Class A explosives must not be transported in a combination vehicle if the vehicle includes:

3 / 40

Select the reason as to why air tanks need to be drained:

4 / 40

Forward and back surge is powerful in this type of tanker.

5 / 40

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

6 / 40

Where should you place your warning devices if you must stop on a one-way or divided highway?

7 / 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?

8 / 40

This object releases the fifth wheel locking jaw to allow uncoupling.

9 / 40

Wet brakes can cause _____.

10 / 40

Buses may carry small-arms ammunition labeled ORM-D, emergency hospital supplies, and drugs. However, buses must never carry:

11 / 40

How do you release the dolly brakes when coupling twin trailers?

12 / 40

Select the true statement in regards to the liquid inside of a bulk tank causing a tank truck to roll sideways.

13 / 40

It is good practice to_____when uncoupling.

14 / 40

Which of the following is a reason to evacuate the school bus?

15 / 40

In the event of an accident you should remember to do the following EXCEPT:

16 / 40

Select the true statement about double or triple trailers.

17 / 40

The average person requires how many hours of sleep per 24 hour period?

18 / 40

Why should you not use the trailer hand brake to straighten out a jack knifing trailer?

19 / 40

Who is responsible for packaging, labeling, and preparing the hazardous material shipping papers for a common carrier?

20 / 40

Shifting into a lower gear and removing your foot off of the accelerator to slow your vehicle is known as?

21 / 40

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

22 / 40

A disruptive passenger:

23 / 40

Which of the following are some suspension system defects?

24 / 40

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

25 / 40

This component should be checked that it is solid, securely bolted to the tracture frame, and clear of objects.

26 / 40

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

27 / 40

Select the true statement:

28 / 40

You must not allow riders to stand:

29 / 40

The air leakage rate for a combination vehicle should not exceed ____psi a minute.

30 / 40

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

31 / 40

This object should not be spliced, cut, chafed, or worn through to allow steel braid to show.

32 / 40

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

33 / 40

Charter drivers should not:

34 / 40

What is the stopping distance for a tractor trailer that is traveling at 55 mph on dry pavement?

35 / 40

How often should you check your cargo?

36 / 40

You are checking the_______when looking at the dipstick to see if the lubrication is at the safe operating range or above the refill line.

37 / 40

Upon what does the amount of liquid you can carry in a load depend?

38 / 40

Which of the following materials would be an acceptable floor liner for moving Division 1.1 or 1.2 materials?

39 / 40

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

40 / 40

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

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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.