Missouri Class A CDL Practice Test (MO) 8

5 out of 5 (38 votes)
80% Passing score
50 Questions
10 Mistakes allowed
If you're aiming for a Class A CDL, our eighth online Missouri CDL practice test is a must-try tool! Tailored for Class A CDL aspirants, this comprehensive practice permit test is an ideal way to gear up for your DMV written test. With 50 thought-provoking CDL test questions, it challenges and prepares you in equal measure. To pass, you'll need to correctly answer at least 40 questions correctly, a benchmark that ensures you're well-prepped for the real deal. Our Missouri CDL Class A Practice Test stands out in its approach to learning. Unlike typical CDL practice tests, we've designed ours to shuffle the questions each time. This means every attempt feels fresh and new, honing your skills and understanding, rather than just memorizing the sequence of questions. Another key feature of our Missouri CDL practice test is its cost - or lack thereof. We believe quality preparation shouldn't come with a hefty price tag. That's why our permit practice test is entirely free! But don't let the price fool you. Our test is packed with features and learning opportunities that rival any paid alternatives. The content of our Missouri DMV CDL practice test is as diverse as it is comprehensive. It covers everything from pre-trip vehicle inspections to shifting gears, and from tackling hills to understanding road communication. We delve into speed control, and even critical topics like drug and alcohol awareness. This variety ensures you're not just prepared for specific scenarios but have a well-rounded grasp of all things CDL. So, if you're in Missouri and gearing up for your Class A CDL in 2026, this DMV practice test is your go-to resource. It's an effective, comprehensive, and cost-free tool that's been carefully crafted to boost your confidence and competence for the Missouri DMV general knowledge test. Dive in and see how well-prepared you can be!
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Sample Missouri CDL Test Questions - General Knowledge

Question 1

After pulling off the road and stopping at night, what should you turn on to warn approaching traffic?

  1. A The four-way emergency flashers
  2. B The left turn signal only
  3. C The high-beam headlights
  4. D The interior cab lights

Correct answer: A – The four-way emergency flashers

The Missouri CDL manual directs drivers to activate the four-way emergency flashers when stopped along the road, especially at night. Taillights alone can make an approaching driver believe that the commercial vehicle is still moving. Emergency flashers provide a clearer warning that the vehicle is stopped and may present a hazard.

Source: Missouri Commercial Driver License Manual — § 2.5.2, “Communicating Your Presence”

Question 2

Which procedure correctly checks whether the parking brake will hold?

  1. A Leave the transmission in neutral and listen for air leaks
  2. B Apply the parking brake, select a low gear, and gently pull against it
  3. C Coast downhill before applying the parking brake
  4. D Apply the parking brake while traveling at least 30 mph

Correct answer: B – Apply the parking brake, select a low gear, and gently pull against it

First secure the vehicle and apply the parking brake. Place the transmission in a low gear and gently pull forward against the brake to confirm that it holds. This is a low-speed holding test, not a high-speed stopping test. A parking brake that does not hold must be repaired before the vehicle is driven.

Source: Missouri Commercial Driver License Manual — § 2.1.5, “Test Parking Brake(s)”

Question 3

Which description best identifies black ice?

  1. A A thin, transparent layer through which the pavement remains visible
  2. B A pile of partially melted ice beside the roadway
  3. C Dark-colored snow left by passing vehicles
  4. D A harmless layer of frost on the vehicle

Correct answer: A – A thin, transparent layer through which the pavement remains visible

Black ice is a thin, clear layer of ice that allows the pavement beneath it to remain visible. Because it often makes the road look wet rather than frozen, it can be difficult to recognize. When the temperature is below freezing and the pavement appears wet, a driver should watch carefully for black ice.

Source: Missouri Commercial Driver License Manual — § 2.6.2, “Identifying Slippery Surfaces”

Question 4

What is the safest response to a motorist who is driving aggressively toward you?

  1. A Maintain eye contact to show confidence
  2. B Respond with similar gestures or driving behavior
  3. C Accelerate to prevent the motorist from passing
  4. D Do not react and move out of the motorist's way when possible

Correct answer: D – Do not react and move out of the motorist's way when possible

Make every reasonable effort to get out of an aggressive driver's way. Do not challenge the motorist by speeding up, holding your position, making gestures, or maintaining eye contact. Ignore provocative behavior and remain focused on controlling your vehicle. If reporting the driver, provide identifying information only when it can be done safely.

Source: Missouri Commercial Driver License Manual — § 2.10.3, “What You Should Do When Confronted by an Aggressive Driver”

Question 5

Why is a damaged exhaust system a serious safety defect?

  1. A Exhaust noise can immediately damage the transmission
  2. B Poisonous fumes can enter the cab or sleeper berth
  3. C Exhaust smoke can damage nearby vehicle paint
  4. D The defect automatically causes the tires to overheat

Correct answer: B – Poisonous fumes can enter the cab or sleeper berth

Broken or leaking exhaust components can allow poisonous fumes to enter the cab or sleeper berth. The inspection should identify missing or damaged pipes, mufflers, stacks, brackets, and clamps, as well as leaks or contact with fuel-system parts. Exhaust defects must be corrected because they create an immediate hazard for the vehicle's occupants.

Source: Missouri Commercial Driver License Manual — § 2.1.3, “Exhaust System Defects”

Question 6

What does an orange road sign generally indicate?

  1. A Temporary traffic control, such as construction or maintenance work
  2. B A permanent general warning
  3. C Route or destination guidance
  4. D A stop or prohibited movement

Correct answer: A – Temporary traffic control, such as construction or maintenance work

The federal MUTCD assigns orange to temporary traffic-control applications. Drivers commonly encounter orange warning and guide signs in construction, maintenance, utility, and other temporary traffic-control zones. Yellow is generally used for permanent warnings, green for destination guidance, and red for stopping or prohibited movements.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways, 11th ed., Revision 1 — § 1D.05, “Color Code”

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