MD · CDL Class B

Maryland CDL Class B Practice Test and Study Guide

This Maryland Class B CDL practice set contains 100 original multiple-choice questions from the saved mixed-module bank. It emphasizes general knowledge and also includes air brakes, hazardous materials, tank vehicles, passenger, and school bus material. Those specialty modules are broader than the tests every Class B applicant must take, so use them only when they match the vehicle, restriction, or endorsement you plan to operate. Each question includes four choices and an explanation for review. Study this bank together with Maryland’s current Commercial Driver’s License Manual and MVA CDL pages. The questions are a study resource, not official MVA exam questions and not an official exam blueprint.

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Every test draws only from the Maryland 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.

Start with Maryland’s Class B licensing path

Maryland requires a valid full Maryland driver’s license before applying for a CDL. A driver may qualify for intrastate commercial driving at age 18, while interstate driving, hazardous-materials transport, and passenger transport require age 21. Class B generally covers a single vehicle with a GVWR of 26,001 pounds or more, or such a vehicle towing a vehicle rated at 10,000 pounds or less. All CDL applicants take the General Knowledge Test. Additional tests apply only when the vehicle or requested credential requires them, such as air brakes, hazardous materials, tank vehicles, passenger vehicles, or school buses. This mixed practice bank includes those specialty areas for broader study, but it does not mean every Class B applicant must take every listed test.

Prepare documents, medical qualification, and training

Maryland’s CDL application guidance requires proof of identity, age, Social Security number, and Maryland residency, along with a valid full Maryland driver’s license. CDL applicants must meet medical and vision standards. Commercial drivers also must maintain the medical certification and self-certification information that applies to their operation. First-time Class B applicants are subject to federal Entry-Level Driver Training from a provider listed in the FMCSA Training Provider Registry before the CDL skills test, unless a federal exception applies. For the skills test, bring the valid Maryland CLP or CDL for the class being tested and the medical or waiver documents that apply to your situation.

Know the knowledge and skills testing sequence

To obtain a Maryland commercial learner’s permit, pass the required CDL knowledge tests for the class and any endorsements you seek. Maryland identifies the General Knowledge Test as required for all CDL applicants. Class B does not require the Class A Combination Vehicle Test merely because the vehicle is Class B. After obtaining the CLP, hold it for at least 14 days before taking the CDL skills test and complete applicable ELDT first. Federal minimum standards require at least 80 percent correct on general and endorsement knowledge tests. The skills test must be taken in a representative vehicle and requires successful performance of all required skills. Maryland’s current DL-151 CDL manual should remain the primary study reference for state procedures and content.

Use specialty modules only when they apply

A Class B CDL by itself does not authorize every specialized commercial operation. This bank includes hazardous-materials, tank, passenger, school-bus, and air-brake content because the task is mixed-module practice. Those sections are conditional. Hazardous-materials and passenger operations also affect Maryland’s minimum age requirements, and first-time H, P, or S endorsements have ELDT requirements. Air-brake material matters when the vehicle uses air brakes and when you want to avoid an air-brake restriction. Keep general knowledge central, then add the specialty modules that match the vehicle and endorsement plan you actually need.

REQUIREMENTS OVERVIEW

Maryland CDL Class B requirements

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

age

Maryland Class B CDL applicants and drivers

Maryland permits commercial driving within the state at age 18. Drivers must be at least 21 to operate commercially across state lines, transport hazardous materials, or transport passengers.

documents

Maryland CDL applicants

Maryland requires a valid full Maryland driver’s license and proof of identity, age, Social Security number, and Maryland residency. CDL applicants must also meet medical and vision standards and maintain required medical certification and self-certification information.

tests

Applicants seeking an initial Maryland Class B CDL

All CDL applicants must pass the General Knowledge Test. Additional knowledge tests apply to air brakes and requested endorsements. Applicants must obtain a CLP, complete applicable ELDT, hold the CLP for at least 14 days, and then pass the CDL skills test in an appropriate Class B vehicle.

passing

Maryland CDL knowledge and skills test applicants

Federal minimum CDL standards require at least 80 percent correct to pass general and endorsement knowledge tests. To pass the skills test, the applicant must successfully perform all required skills in a representative vehicle.

applicability

Users of this Maryland Class B mixed-module practice bank

Class B generally covers a qualifying heavy single vehicle and may include a trailer rated at 10,000 pounds or less. This 100-question bank includes six study modules; hazardous materials, tank, passenger, school bus, and air-brake material applies only when relevant to the applicant’s vehicle, endorsement, or restriction status. The bank length and module mix are not presented as an official Maryland exam blueprint.

OFFICIAL REFERENCES

Sources for this guide

Open the current source before relying on licensing details.

Get or Renew a CDL | MDOT Motor Vehicle AdministrationEligibility, application steps, documents, ELDT, medical requirements, CLP and 14-day waitOpen source ↗ CDL Classifications, Endorsements & Restrictions | MDOT MVAClass B definition and endorsement/restriction overviewOpen source ↗ Knowledge Tests | MDOT Motor Vehicle AdministrationCommercial knowledge tests, General Knowledge, air-brake and endorsement testsOpen source ↗ CDL Skills Test | MDOT Motor Vehicle AdministrationELDT, two-week learner-permit requirement, test-day documents and vehicleOpen source ↗ CDL Medical Certification Requirements in Maryland | MDOT Motor Vehicle AdministrationMedical Examiner’s Certificate and self-certification requirementsOpen source ↗ Maryland Driver’s Manuals | MDOT Motor Vehicle AdministrationCommercial Driver’s License Manual (DL-151), May 1, 2026Open source ↗ States | Federal Motor Carrier Safety AdministrationKnowledge and Skills Test minimum standards and 80 percent passing standardOpen source ↗ Entry-Level Driver Training (ELDT) | Federal Motor Carrier Safety AdministrationFirst-time Class A and B and first-time S/P/H endorsement trainingOpen source ↗ The Motor Carrier Safety Planner: CMV Groups (383.91)Federal Group A, B, and C vehicle definitionsOpen source ↗