State CDL preparation

District of Columbia CDL tests

Choose a category, then study with practice tests, flashcards, or exam simulation. Use the current official District of Columbia CDL manual as your primary source.

PDF

Official government resource

District of Columbia CDL manual

Open the official state licensing-agency page to read or download the latest Commercial Driver License manual. State agencies may update or replace their PDF without notice.

Open official manual ↗

Select a category

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Required for every CDL applicant

General Knowledge

Core commercial-driving rules, safe operation, emergencies, cargo, communication, and vehicle control.

Choose learning mode →AB

For vehicles equipped with air brakes

Air Brakes

Air-brake components, inspections, warning devices, stopping, and safe brake operation.

Choose learning mode →CV

For Class A tractor-trailer applicants

Combination Vehicles

Coupling, uncoupling, trailer control, rollover prevention, and combination-vehicle inspection.

Choose learning mode →HM

For the H endorsement

Hazardous Materials

Hazard classes, shipping papers, placards, loading rules, emergencies, and secure transportation.

Choose learning mode →TN

For the N endorsement

Tanker Vehicles

Liquid surge, outage, smooth control, inspection, and safe operation of tank vehicles.

Choose learning mode →PV

For the P endorsement

Passenger Vehicles

Passenger safety, loading, prohibited practices, emergency equipment, and vehicle inspection.

Choose learning mode →SB

For the S endorsement

School Bus

Student loading, danger zones, warning systems, railroad crossings, and emergency procedures.

Choose learning mode →DT

For the T endorsement

Doubles & Triples

Converter dollies, coupling order, inspections, handling, and preventing trailer rollover.

Choose learning mode →PT

Prepare for the vehicle inspection test

Pre-Trip Inspection

Engine compartment, cab checks, brakes, lights, coupling, tires, suspension, and safety equipment.

Choose learning mode →