DC · CDL Class B

DC Class B CDL Mixed Practice Questions and Licensing Guide

This District of Columbia Class B CDL practice bank contains 100 original questions covering general knowledge, air brakes, hazardous materials, tank vehicles, passenger vehicles, and school buses. It is broader than the set of tests every applicant must take: DC DMV currently identifies General Commercial Class B and Airbrakes as the core Class B test areas, while endorsement modules apply only when the driver seeks the related authority. Use the bank to review inspections, braking, operating rules, cargo, passenger safety, hazardous materials, and tank dynamics, then confirm current licensing steps with DC DMV. These are study questions, not official DC DMV exam items, and the 100-question format should not be treated as the length or blueprint of an actual CDL examination.

Choose a Test Official source ↗

START PRACTICING

Choose your test size

Every test draws only from the District of Columbia CDL Class B question bank.

20questionsStart Class B test → 40questionsStart Class B test → 60questionsStart Class B test → 80questionsStart Class B test →

LICENSING GUIDE

What to know before you test

Use this overview together with the latest official guidance linked below.

Confirm Class B eligibility and the vehicle group

DC DMV defines Group B as a heavy straight vehicle with a GVWR greater than 26,000 pounds, including such a vehicle towing another vehicle with a GVWR of 10,000 pounds or less. The regular DC CDL eligibility path requires applicants to be at least 21 and to hold a valid non-commercial driver license. DC also offers an intrastate CDL beginning at age 18, but the current intrastate credential is restricted to Class C vehicles, so it is not a younger Class B route. Applicants must also satisfy identity, lawful-status, driving-history, medical-qualification, and other eligibility requirements.

Pass the Class B knowledge tests and obtain the CLP

DC DMV currently lists General Commercial Class B and Airbrakes as the required Class B knowledge tests. Additional knowledge tests are tied to endorsements or specialized operations rather than being universal Class B requirements. New CLP applicants must also complete the District's Human Trafficking Awareness training. After passing the required knowledge tests and meeting the documentation requirements, the applicant obtains a commercial learner permit. DC DMV requires a valid CLP to be held for at least 30 calendar days before a CDL road skills test can be scheduled.

Complete ELDT and prepare for the Class B skills test

Federal and DC entry-level driver training rules apply to a first Class B CDL. They also apply to first-time passenger, school-bus, and hazardous-materials endorsements, with hazardous-materials training completed before the H knowledge test and Class B training completed before the skills test. Training must be provided by an eligible provider recorded through the federal Training Provider Registry. For the Class B road skills appointment, DC DMV requires the valid CLP and NCDL, applicable medical qualification, a properly registered and insured vehicle that matches the requested class or endorsement, and an accompanying CDL driver age 21 or older who holds the needed class and endorsements or higher.

Keep endorsement modules separate from universal Class B requirements

This mixed bank includes hazardous materials, tank vehicles, passenger, and school-bus questions because a Class B driver may seek those authorities, but those modules are not automatic parts of every Class B credential. DC DMV separately lists endorsement knowledge and skills requirements and notes that H and tank endorsements do not require an endorsement road skills test, while passenger and school-bus operations do. Use each module only when it matches the work you plan to perform. For inspections, braking, cargo, operating rules, passenger safety, hazardous materials, and tank dynamics, study the official DC CDL manual together with current DMV pages because current District and federal requirements can change after a manual is published.

REQUIREMENTS OVERVIEW

District of Columbia CDL Class B requirements

Requirements depend on the applicant and can change. Verify each item with the cited agency.

age

District of Columbia applicants seeking a Class B CDL

The regular DC CDL eligibility page requires applicants to be at least 21 years old and hold a valid non-commercial driver license. DC offers an intrastate CDL from age 18, but the current intrastate credential is restricted to Class C vehicles, so it is not a Class B path.

documents

DC Class B CDL and road-skills applicants

DC CDL applicants must meet identity and lawful-status requirements, provide required driving-history information, and satisfy current DOT medical-certification rules. For the Class B road skills test, DC DMV also requires the valid CLP and NCDL, applicable medical qualification, the proper registered and insured test vehicle, and an appropriately licensed accompanying CDL driver.

tests

DC Class B CDL applicants

DC DMV currently requires General Commercial Class B and Airbrakes testing for the Class B credential. Additional tests depend on endorsements sought. After the required CLP holding period and applicable ELDT, the applicant must complete the Class B CDL road skills test.

passing

Applicants completing DC CDL knowledge and road skills testing

Applicants must pass all required knowledge tests to obtain the appropriate CDL learner permit and must pass the required road skills testing to receive the CDL. The current DC DMV CDL pages reviewed for this guide do not publish a numeric passing percentage for these tests, so this page does not invent one.

applicability

Class B applicants using this 100-question mixed practice bank

The bank covers Class B general knowledge and air brakes plus hazardous-materials, tank, passenger, and school-bus material. Those endorsement and specialized-operation modules apply only when the driver seeks the corresponding authority; federal ELDT separately applies to first-time Class B applicants and specified first-time P, S, and H endorsements.

OFFICIAL REFERENCES

Sources for this guide

Open the current source before relying on licensing details.

Commercial Driver License | DC DMVSteps to obtain a DC CDL; knowledge, CLP, ELDT and skills sequenceOpen source ↗ CMV Group and CDL Class and Endorsements | DC DMVGroup B definition; Class B; CDL endorsementsOpen source ↗ CDL Eligibility and Documentation | DC DMVRegular CDL age, NCDL, identity, lawful status, driving history, medical qualification and human-trafficking trainingOpen source ↗ Obtain an Intrastate CDL | DC DMVAge 18 intrastate eligibility and Class C-only restrictionOpen source ↗ CDL Knowledge Tests | DC DMVClass B required knowledge tests and conditional endorsement testsOpen source ↗ CDL Road Skills Tests | DC DMV30-day CLP period, Class B skills requirements, appointment and test-day documentsOpen source ↗ Entry-Level Driver Training | DC DMVELDT applicability for Class B and specified endorsementsOpen source ↗ DC DMV Commercial Driver License ManualOfficial CDL study manual and commercial-driving knowledgeOpen source ↗ Entry-Level Driver Training (ELDT) | FMCSAFederal ELDT applicability and Training Provider RegistryOpen source ↗