DMV

Missouri CDL Knowledge Test Sample Questions

Real, Missouri-specific sample questions from our practice question bank, with the correct answer, a full explanation, and a source reference for each. See our national sample questions for topics that apply to every state, or take the full Missouri cdl practice test to test yourself instead of just reading the answers.

General Driving Knowledge

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1. What is the total fee for an initial Missouri commercial learner's permit (CLP)?

A$3.50
B$44, split across a written-exam, permit, and processing fee
C$125, a single flat fee with no itemized breakdown
DThere is no fee at all for a CLP
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2. How many separate written tests must a Missouri Class A CDL applicant pass to obtain a CLP for a combination vehicle with air brakes?

AOne combined test covering everything at once
BTwo tests: General Knowledge and Air Brakes only
CThree tests: General Knowledge, Air Brakes, and Combination Vehicles
DFour tests, including a separate hazmat test for every applicant
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3. What BAC threshold applies specifically to commercial drivers in Missouri?

A0.08%, the same as a standard adult driver
B0.02%, the same as an underage driver
C0.10%, higher than the standard adult threshold
D0.04%, half the standard adult threshold
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4. What must a Missouri CDL applicant complete before the skills test, alongside the knowledge test?

ANo additional training; the knowledge test alone is sufficient
BA four-year commercial driving degree program
CFederal entry-level driver training (ELDT) through a registered provider
DA separate state-only training program unrelated to federal ELDT
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5. Which agency administers the CDL knowledge and skills tests in Missouri?

AThe Missouri Department of Revenue directly, at its own offices
BThe Highway Patrol, the same agency that tests other drivers
CA private third-party testing company under exclusive state contract
DThe Federal Motor Carrier Safety Administration directly

More Questions

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6. Which recent statewide change affects a Missouri CDL holder's cell phone use even in a personal vehicle?

ATexting while driving is now banned for every driver, not just those under 21
BNo change has occurred; the under-21-only texting ban still applies
CHands-free calling was newly banned for all drivers
DThe change only applies while operating a commercial vehicle
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7. Under federal hours-of-service rules that apply to Missouri CDL holders, how many hours of driving are allowed after 10 consecutive hours off duty?

AUp to 15 hours, with no separate on-duty window limit
BUp to 8 hours, regardless of the on-duty window
CUp to 11 hours, within a 14-hour on-duty window
DUnlimited hours as long as breaks are logged