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Missouri General Knowledge Test

We've included questions about navigating I-70's construction zones and winter ice - you'll face the same on test day.

140
Questions
80%
To Pass
60
Minutes

140 questions · 60 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Missouri CDL handbook and FMCSA regulations.

About the Missouri General Knowledge Test

Missouri's roads throw a lot at you. You'll drive I-44's long hills near Rolla, cross the Mississippi on I-270, and haul through farm country on US-60. Winter ice, summer construction, and sudden fog in the Bootheel - our test covers every condition Missouri drivers face.

We built this practice test from the official Missouri CDL manual. Each question mirrors what you'll see at the DMV. Focus on air brakes, pre-trip inspection, and cargo handling. Missouri's agriculture industry means you'll often haul grain, livestock, or equipment - our questions teach you the weight and securement rules you need.

Missouri uses the same 50-question General Knowledge test as most states, but they add state-specific items about local laws. You'll need 40 correct to pass (80%). Our practice tests track your weak spots so you can study smarter, not longer.

Missouri is where the nation's east-west and north-south freight corridors meet. I-70 and I-44 cross the state from east to west, I-55 runs north-south along the Mississippi, and I-35 connects Kansas City to the Midwest. St. Louis and Kansas City are two of the largest freight hubs in the central United States. Our general knowledge practice test mirrors the official Missouri DOR CDL written exam.

The state's geography creates real driving challenges. The Ozark Mountains in southern Missouri add winding grades on I-44 and US-60, while the Mississippi River bridges at St. Louis (I-70, I-64, I-55/I-70 Poplar Street Bridge) carry massive truck traffic with tight lanes and frequent congestion. The Missouri Department of Transportation manages these critical crossings, and the exam tests space management, following distance, and bridge clearance awareness because they are daily safety factors.

St. Louis is a major intermodal hub, with the Terminal Railroad Association of St. Louis and extensive rail-truck transfer operations. Kansas City is equally important, with massive rail yards and distribution centers driving freight on I-70, I-35, and I-435. Missouri's weather adds severe thunderstorms in spring and summer, with tornado risk, flash flooding, and crosswinds — the exam tests weather awareness and defensive driving in rapidly changing conditions.

Topics Covered

✓Safe driving practices – Missouri's winding two-lane highways (like MO-19) demand constant attention to curves and blind hills.
✓Vehicle inspection – Pre-trip checks help you avoid breakdowns on remote stretches of I-70 where help is miles away.
✓Basic control and air brakes – Missouri's steep grades on I-44 mean you must master brake lag and stopping distances.
✓Cargo handling and securement – Hauling hay bales or livestock on US-60? You'll learn tie-down rules that keep your load legal.
✓Hazard awareness – Fog in the Bootheel and black ice in the Ozarks make hazard recognition critical for Missouri drivers.
✓Traffic laws and signaling – Missouri's right-on-red and merge laws differ from other states; we cover them in detail.

Study Tips

Start with the Missouri CDL manual – it's free online at dor.mo.gov. Read the General Knowledge section twice. Then take our practice test to find your weak spots. Focus on air brakes and combination vehicles – those trip up most drivers.

Missouri DMV offices usually let you walk in for the knowledge test. Bring your Social Security card, proof of residency, and $5 fee. If you fail, you can retake the same day after paying again. Don't rush – study until you score 90% on practice tests, then schedule your real exam.

Missouri Specific Information

  • You can take the Missouri CDL General Knowledge test at any full-service DMV office. Most accept walk-ins, but call ahead – some offices close for lunch or have limited hours. The fee is $5 per attempt. Bring your current driver's license, Social Security card, and two proofs of Missouri residency (utility bill, bank statement).

    Skills tests require an appointment. Missouri uses a centralized scheduling system through the DMV website. The skills test fee is $20 for the pre-trip and basic control, plus $20 for the road test. You'll drive a truck that meets federal requirements – make sure your vehicle's lights, brakes, and tires are in top shape.

    Special note: If you already hold a Missouri CDL and want to add endorsements (tank, hazmat, doubles/triples), you only need the knowledge tests – no skills test. Visit dor.mo.gov for a list of offices that offer CDL services.

  • The Missouri Department of Revenue (DOR) requires a knowledge test for all CDL classes; the general knowledge exam is the foundation for every commercial license.
  • St. Louis and Kansas City are major freight hubs — intermodal, rail-truck, and river-crossing traffic is heavy on I-70, I-44, I-55, and I-35.
  • The Ozark Mountain routes on I-44 and US-60 in southern Missouri have winding grades where speed management and gear selection are essential.
  • Mississippi River bridges at St. Louis (I-70, I-64, I-55/I-70) carry heavy truck traffic with tight lanes — scanning and following distance are critical.
  • Severe thunderstorms and tornadoes in spring and summer produce flash flooding and sudden crosswinds; the exam tests weather-related speed adjustment.
  • Missouri's central location means long-haul cross-country routes — the exam covers fatigue management and hours-of-service rules.

Frequently Asked Questions

Do I need an appointment for the Missouri CDL knowledge test?
No, most Missouri DMV offices let you walk in for knowledge tests. But call your local office first – some have limited hours or close for lunch.
What documents do I need to bring to the Missouri DMV for the CDL test?
Bring your current driver's license, Social Security card, and two proofs of Missouri residency (like a utility bill or bank statement). You'll also need the $5 fee – cash or debit card.
How many questions are on the Missouri General Knowledge test, and what's the passing score?
There are 50 multiple-choice questions. You need 40 correct to pass – that's 80%. The test covers safe driving, vehicle inspection, air brakes, and cargo handling.
Can I take the Missouri CDL knowledge test in Spanish?
Yes, Missouri offers CDL knowledge tests in Spanish. You can also request an oral test if you have trouble reading. Just tell the DMV staff when you arrive.
What happens if I fail the Missouri CDL general knowledge test?
You can retake it the same day after paying another $5 fee. There's no limit on attempts, but you'll need to wait if the office closes. Study your weak areas before trying again.
JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content