Missouri CDL General Knowledge Practice Test (MO) 2

4.9 out of 5 (83 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you gearing up to ace your Missouri CDL General Knowledge Test? Dive right into our second CDL practice test, a crucial stepping stone on your path to becoming a certified commercial driver in 2026! This comprehensive CDL practice test, featuring 20 thoughtfully crafted questions, mirrors the real DMV permit test, making it a valuable tool for both Class A and Class B license aspirants, regardless of the endorsements you're aiming for. Each sample permit test question on this general knowledge practice test is designed to challenge and expand your understanding of essential driving topics. From pre-trip vehicle inspections to mastering gear shifts, including downshifting techniques, and handling challenging road scenarios like steep downgrades, this Missouri CDL general knowledge practice test covers it all. It also delves into vital safety aspects such as effective communication with fellow drivers, speed control, and drug and alcohol awareness. The beauty of this online CDL practice test lies in its consistency - the same set of general knowledge test questions awaits you each time, allowing for focused learning and reinforcement of key concepts. One of the standout features of this Missouri CDL general knowledge test practice is its untimed format. Unlike the actual CDL permit test in 2026, here you can take all the time you need to ponder over each sample question. This relaxed approach not only eases the pressure but also enhances your learning experience, letting you absorb information at your own pace. Furthermore, the flexibility to retake this Missouri CDL practice test multiple times is a game-changer. It means you can practice till you're confident enough to move on to the next level. This repeated exposure to the questions will cement your understanding and readiness for the actual DMV written test in 2026. In addition, you have the freedom to tailor your practice sessions. Whether you want to focus on specific challenging topics or aim to improve your overall score, these customizable sessions cater to your unique study needs. Practice at your convenience, and turn your weak areas into strengths with this versatile and comprehensive Missouri CDL General Knowledge Practice Test!
FREE CDL Practice Test App
Pass your Missouri CDL General Knowledge test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample Missouri CDL Test Questions - General Knowledge

Question 1

When a red traffic signal requires you to stop, where should the vehicle be stopped?

  1. A At the stop line, before the crosswalk, or before entering the intersection
  2. B Inside the intersection if the signal was previously green
  3. C Past the crosswalk so crossing traffic can see the vehicle
  4. D Anywhere, provided the stop lasts less than two minutes

Correct answer: A – At the stop line, before the crosswalk, or before entering the intersection

At a red signal, stop at the marked stop line. If no stop line is present, stop before the crosswalk or, if there is no crosswalk, before entering the intersection. A previously green signal or a brief stop does not make stopping within the intersection an acceptable choice.

Source: Missouri Driver Guide — Ch. 7, “Traffic Signals”

Question 2

In Missouri, what does a yellow diamond sign displaying a black cross symbol warn about?

This sign warns drivers to _____________.
  1. A A work zone extending for 1,000 feet
  2. B Another road crossing ahead
  3. C A change in the posted speed limit
  4. D A stop sign immediately ahead

Correct answer: B – Another road crossing ahead

The cross symbol is an intersection warning sign. It indicates that another road crosses the roadway ahead and that vehicles may travel across your path. Watch carefully for crossing traffic and adjust your speed as conditions require.

Source: Missouri Driver Guide — Ch. 7, “Road Intersections”

Question 3

What must you do when approaching a YIELD sign?

When you see a YIELD sign:
  1. A Slow to a reasonable speed, prepare to stop, and yield as required
  2. B Continue without reducing speed
  3. C Expect all other vehicles to stop
  4. D Require pedestrians and bicyclists to wait for you

Correct answer: A – Slow to a reasonable speed, prepare to stop, and yield as required

Missouri law requires a driver approaching a yield sign to slow to a speed reasonable for existing conditions and stop if safety requires it. After slowing or stopping, the driver must yield to traffic in or closely approaching the intersection. A full stop is unnecessary only when the way is clear and proceeding will not interfere with other traffic.

Source: Missouri Driver Guide — Ch. 7, “Yield”, Mo. Rev. Stat. § 304.351.4(2)(b) – Right-of-way at intersection — signs at intersections — violation, penalty — additional penalties — definitions — order of suspension, contents, appeal

Question 4

A heavy vehicle must use an exit ramp that curves downhill. What should the driver do?

  1. A Enter at the posted ramp speed regardless of vehicle size or load
  2. B Reduce to a safe speed before reaching the curved portion
  3. C Wait until inside the curve before downshifting
  4. D Shift into a higher gear before turning

Correct answer: B – Reduce to a safe speed before reaching the curved portion

The Missouri CDL manual warns that a ramp combining a curve and downgrade can be especially hazardous for a large or heavily loaded vehicle. Slow to a safe speed before reaching the curved portion. Braking and turning at the same time can reduce stability, and a posted ramp speed may still be too fast for the vehicle or conditions.

Source: Missouri Commercial Driver License Manual — § 2.8.2, “Hazardous Roads”

Question 5

The posted limit is 55 mph and the road is wet. According to the CDL manual's general guideline, about how fast should you travel?

  1. A 35 mph
  2. B 55 mph
  3. C 45 mph
  4. D 50 mph

Correct answer: A – 35 mph

Wet pavement reduces traction and can double stopping distance. The CDL manual recommends reducing speed by about one-third on a wet road, giving the example of slowing from 55 mph to about 35 mph. Actual conditions may require an even lower speed to maintain control and stop safely.

Source: Missouri Commercial Driver License Manual — § 2.6.2, “Matching Speed to the Road Surface”

Question 6

As a person's blood alcohol concentration increases, what happens to driving ability?

  1. A Alcohol's effects become weaker
  2. B The person always recognizes the increasing impairment
  3. C The person becomes increasingly dangerous behind the wheel
  4. D The body eliminates alcohol more quickly

Correct answer: C – The person becomes increasingly dangerous behind the wheel

As BAC rises, alcohol affects more of the brain. Judgment and self-control are affected early, and the drinker may not recognize the increasing impairment. Higher levels increasingly interfere with muscle control, vision, and coordination, making safe driving less likely.

Source: Missouri Commercial Driver License Manual — § 2.22.1, “Alcohol and Driving”

More Missouri CDL Practice Tests
Other CDL Endorsements