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From Sections 1, 2 and 3 of the Maryland Commercial Driver’s License Manual

Maryland CDL General Knowledge Practice Test

Who takes it: every CDL class (A, B and C).

Inspection, safe driving and cargo: every CDL applicant takes it. 50 questions, 40 right to pass (80%).

Study mode

Practice General Knowledge

  • 10questions a round
  • 8manual sections
Exam mode

Take the General Knowledge test

  • 50questions
  • 40correct to pass
  • –no test taken yet
Sections 1–3 · p. 4–136 of the Maryland Commercial Driver’s License Manual (DL-151 (05/26)), opens in a new tab

A General Knowledge question to try

What kind of Maryland license must you hold to get a commercial learner's permit?

Tap an answer to see if you’re right, and the page

Where it is in the Maryland Commercial Driver’s License Manual

Your score on each part fills in as you study.

  • Manual section 1
  • Introduction: Maryland CDL rules, tests, medical rules and disqualificationsNot practiced yetp. 4 to 35
  • Manual section 2 · 6 topics
  • Vehicle inspectionNot practiced yetp. 37 to 51
  • Vehicle control, seeing and communicatingNot practiced yetp. 52 to 64
  • Speed, space and seeing hazardsNot practiced yetp. 65 to 89
  • Night, weather, railroad crossings and mountainsNot practiced yetp. 90 to 108
  • Emergencies, skids, crashes and firesNot practiced yetp. 109 to 122
  • Alcohol, drugs, illness and hazmat basicsNot practiced yetp. 123 to 129
  • Manual section 3
  • Transporting cargo safelyNot practiced yetp. 130 to 136

Only in the Maryland manual

Rules for this test that the Maryland Commercial Driver’s License Manual prints and other states' manuals don't.

  • 1.3 Medical Documentation Requirements

    Since June 23, 2025, Maryland's MVA gets your medical certificate directly from FMCSA's National Registry. p. 25

  • 1.4.5 Railroad-highway Grade Crossing Violations

    In Maryland every commercial motor vehicle must stop at every railroad-highway grade crossing; railroad crossing violations cost the CDL at least 60 days for the first, 120 days for a second within three years, and one year for a third within three years. p. 29

  • 2.9.4 Hand-held Phone Penalties

    Using a hand-held phone while driving a CMV can bring a 60-day disqualification for a second offense within 3 years and 120 days for a third or later, fines for the driver, and fines for an employer that allows or requires it. p. 86

  • 2.9.5 Texting

    Texting while driving a CMV carries the same disqualifications (60 days for a second offense within 3 years, 120 days for three or more) and fines. p. 87

Maryland answers about this test

CDL General Knowledge Test guide30 rules, with the pages in each state's manual

Practice material, not the official test: check every answer in your state's current handbook. Disclaimer · How the rounds work · MVA

All Maryland CDL tests