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FREE CDL Study Guide 2026: Pass the General Knowledge Test on Your First Try

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Key Facts

  • The CDL General Knowledge test is required for every CDL class (A, B, and C) before drivers can take road skills tests or add endorsements.
  • The CDL General Knowledge test is typically 50 multiple-choice questions, with exact administration details set by each state DMV.
  • Most states require at least 80% to pass the General Knowledge test, which usually means 40 correct out of 50 questions.
  • State CDL manuals are based on the AAMVA model CDL manual, so General Knowledge topics stay consistent across nearly all U.S. states.
  • FMCSA's Entry-Level Driver Training (ELDT) rule took effect February 7, 2022 for first-time Class A and Class B applicants and certain endorsements.
  • ELDT applies to training verified before the state skills test, not to the General Knowledge knowledge test itself, which is taken at the DMV.
  • State-set CDL written-test and permit-related fees vary widely, often roughly $10 to $125 depending on the jurisdiction and license class.
  • BLS reports a median annual wage of $58,640 for heavy and tractor-trailer truck drivers as of May 2025.
  • BLS projects 4% employment growth for heavy and tractor-trailer truck drivers from 2025 to 2035.
  • BLS projects about 214,500 annual openings for heavy and tractor-trailer truck drivers each year over the decade.

FREE CDL Study Guide 2026: General Knowledge Pass Plan

If you are preparing for a Commercial Driver's License (CDL) , your first major checkpoint is the General Knowledge written test . Every CDL class - Class A, Class B, and Class C - requires this exam, and it controls whether you can move forward to road skills testing and endorsement pathways.

The challenge in 2026 is not just memorizing facts from a handbook. It is learning how to apply safety rules, inspection logic, and control decisions quickly under timed conditions.

This guide gives you a practical roadmap.

Exam Format & Structure

  • Component Details
  • Total Questions Typically 50 on General Knowledge (state variation applies)
  • Time Limit Usually about 60 minutes (state variation applies)
  • Passing Score Usually 80% (many states require at least 40/50 correct)
  • Pass Rate No single national pass rate published across all state DMVs
  • Cost State-set fees (often about $10-$125 depending on state/license class)
  • Testing Format Computer or paper test at state DMV/authorized test site
  • Start Your FREE CDL Prep Today