District of Columbia CDL practice test.
CDL knowledge tests follow the federal CDL manual. Practice by topic, then confirm the details for District of Columbia with the state agency.
CDL practice by topic.
General knowledge applies to everyone. Add the groups that match the vehicle and endorsements you plan to get.
General knowledge
- CDL Classes, Endorsements and Rules13 questions
- Inspecting Your Vehicle32 questions
- Steering, Shifting and Backing29 questions
- Seeing, Signaling and Spotting Hazards21 questions
- Regulatory, Route and Service Signs21 questions
- Warning and Work Zone Signs27 questions
- Controlling Speed24 questions
- Slippery Roads and Hydroplaning20 questions
- Managing Space Around Your Vehicle31 questions
- Night and Fog Driving14 questions
- Winter, Hot Weather and Wind12 questions
- Railroad Crossings and Drawbridges15 questions
- Mountain Grades and Brake Fade16 questions
- Emergency Maneuvers and Failures14 questions
- Antilock Brakes (ABS)14 questions
- Skids and Emergency Braking16 questions
- Crash Scenes and Vehicle Fires13 questions
- Alcohol, Drugs, Fatigue and Distraction21 questions
- Loading and Securing Cargo21 questions
Passenger
- Bus Inspection and Safety Equipment22 questions
- Standees, Seats and Baggage19 questions
- Hazardous Materials on Buses16 questions
- On the Road with Passengers20 questions
Air brakes
Combination vehicles
Doubles and triples
- Pulling Doubles and Triples24 questions
- Coupling Doubles and Converter Dollies28 questions
- Inspecting Doubles and Triples15 questions
Tank vehicles
- Tanks, Baffles and Bulkheads28 questions
- Liquid Surge and Tanker Handling20 questions
- Tank Inspection, Loading and Outage20 questions
HazMat
- HazMat Rules, Roles and Classes33 questions
- HazMat Shipping Papers27 questions
- The Hazardous Materials Table15 questions
- Labels, Markings and Placards23 questions
- Loading and Unloading HazMat32 questions
- Parking and Watching a HazMat Load17 questions
- HazMat Routes, Crossings and Checks23 questions
- HazMat Emergencies and Reporting24 questions
School bus
- School Bus Basics and Danger Zones25 questions
- Loading and Unloading Students31 questions
- School Bus Evacuation and Emergencies20 questions
- School Buses at Railroad Crossings13 questions
- Student Behavior and Special Needs17 questions
- School Bus Pre-Trip and Post-Trip18 questions
Practice exam
Our CDL practice follows the federal CDL manual. The District of Columbia DMV sets the exact tests, number of questions and rules for District of Columbia; confirm them before you book.
District of Columbia CDL test
FAQ.
Which CDL knowledge tests do I need in District of Columbia?
Everyone takes general knowledge. Add air brakes if your vehicle has them, combination vehicles for Class A, and a test for each endorsement you want, such as HazMat, tank, doubles and triples, passenger or school bus.
Are District of Columbia CDL questions different from other states?
The knowledge tests follow the federal CDL manual, so most rules are the same in every state. Each state publishes its own manual and may add state rules. Confirm with the state agency.
Where do I take the District of Columbia CDL knowledge test?
At a District of Columbia DMV location that offers commercial testing. Check the DMV website for locations, fees and the documents to bring.
Practice the District of Columbia CDL test on your phone.
Practice here in your browser, or use the app with the same questions and explanations. It's free on the App Store.