Louisiana CDL Practice Test Questions and Answers (LA) 7

5 out of 5 (32 votes)
80% Passing score
50 Questions
10 Mistakes allowed
We are delighted to present to you the seventh installment of our Louisiana CDL General Knowledge Practice Tests! Designed to hone your understanding and application of road rules and regulations, this test is a crucial step in your preparation for the Louisiana CDL permit. This specific practice test comprises 50 meticulously crafted Louisiana CDL test questions and answers, mirroring the structure and content of the actual CDL test. To pass, you'll need to correctly answer at least 40 questions, but don't fret; the same questions will reappear each time you attempt the test. This repetition reinforces your learning, ensuring that you're well-prepared for every scenario you might encounter on the road. What sets our Louisiana CDL practice test apart is its dedication to accessibility and convenience. Whether you're on a desktop at home, or using a mobile app on the go, our Louisiana DMV practice tests are just a click away. This universal accessibility ensures that every aspiring commercial driver in Louisiana can practice anytime, anywhere. Moreover, we understand the pressure of timed tests. That's why our Louisiana CDL permit practice test is untimed, allowing you to delve deep into each question without the stress of a ticking clock. This relaxed environment is crucial for thorough learning and understanding, even though the actual CDL permit test will be timed. It's about building confidence and competence at your own pace. Upon completion of the DMV practice test, you'll receive a comprehensive summary of your performance. This feedback is invaluable, highlighting areas of strength and those needing improvement. You'll see the questions you missed along with the correct answers, turning every mistake into a learning opportunity. With our Louisiana CDL practice test, you're not just memorizing answers; you're building a solid foundation of knowledge and skills. So, Louisiana, let's get ready to ace that CDL test in 2026!
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Sample Louisiana CDL Test Questions - General Knowledge

Question 1

Battery fluid belongs to which hazardous-material class?

  1. A Class 6 poison
  2. B Class 3 flammable liquid
  3. C Minor fire hazard
  4. D Class 8 corrosive

Correct answer: D – Class 8 corrosive

The Louisiana manual’s hazard-class table lists battery fluid as a Class 8 corrosive material. Federal hazardous-material classifications likewise place battery fluid entries in Class 8. “Minor fire hazard” is not a hazardous-material class, and battery fluid should not be classified as a poison or flammable liquid merely because it is a liquid.

Source: Louisiana Commercial Driver License Manual — § 2.22, “Hazardous Materials Rules for All Commercial Drivers”, 49 CFR § 172.101 — Purpose and Use of Hazardous Materials Table

Question 2

Which items belong in a commercial vehicle’s pre-trip inspection?

  1. A Cargo securement
  2. B Clean, properly operating vehicle lights
  3. C Both cargo securement and vehicle lights
  4. D Neither item

Correct answer: C – Both cargo securement and vehicle lights

During the walk-around inspection, verify that cargo is properly blocked, braced, tied, chained, or otherwise secured. Check that the vehicle’s lights operate correctly and clean the lights, reflectors, and glass as you inspect. Both checks help identify conditions that could cause a crash, cargo loss, or poor visibility.

Source: Louisiana Commercial Driver License Manual — § 2.1.4, “Seven-step Inspection Method”

Question 3

Besides keeping cargo as low as possible, what driving practice helps prevent a rollover?

  1. A Adjust the brakes immediately before every turn
  2. B Grip the steering wheel as tightly as possible
  3. C Drive slowly through turns and ramps
  4. D Remove all fifth-wheel free play

Correct answer: C – Drive slowly through turns and ramps

Keeping cargo low reduces the vehicle’s center of gravity, while reducing speed through corners, entrance ramps, and exit ramps lowers rollover risk. A commercial vehicle may roll when a turn is taken too fast, especially when fully loaded. Avoid abrupt lane changes and make steering movements smoothly.

Source: Louisiana Commercial Driver License Manual — § 6.1.1, “Rollover Risks”

Question 4

Which action correctly describes controlled braking?

  1. A Lock the wheels and hold the pedal down until stopped
  2. B Brake as hard as possible without locking the wheels
  3. C Lock the wheels, release the brakes, and repeatedly reapply them
  4. D Avoid using the technique on any heavy vehicle

Correct answer: B – Brake as hard as possible without locking the wheels

The Louisiana manual defines controlled braking as applying the brakes as hard as possible without locking the wheels. Keep steering movements small during the maneuver. If the wheels lock or a larger steering correction becomes necessary, release the brakes and reapply them as soon as possible. Repeatedly releasing the brakes after wheel lock describes stab braking instead.

Source: Louisiana Commercial Driver License Manual — § 2.17.2, “How to Stop Quickly and Safely”

Question 5

A sign showing a U-shaped arrow crossed by a red slash means:

This sign indicates that ______________.
  1. A No turns are allowed at the intersection
  2. B U-turns are prohibited
  3. C The roadway is closed to through traffic
  4. D Traffic moves in one direction only

Correct answer: B – U-turns are prohibited

This is the No U-Turn regulatory sign. In Louisiana, a driver may not reverse direction by making a U-turn where it is posted. The sign does not prohibit every type of turn, close the roadway, or designate one-way traffic.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways, 11th ed. — § 2B.26, “Movement Prohibition Signs (R3-1 through R3-4, R3-18, and R3-27)”

Question 6

To identify hazards early, how far ahead should a commercial driver generally scan?

  1. A 10 to 12 seconds
  2. B 8 to 10 seconds
  3. C 12 to 15 seconds
  4. D 15 to 17 seconds

Correct answer: C – 12 to 15 seconds

Louisiana's CDL manual recommends looking at least 12 to 15 seconds ahead, or the distance the vehicle will travel during that time. This provides time to recognize changing traffic conditions and adjust speed or position. Drivers must also continue shifting their attention between near and distant hazards.

Source: Louisiana Commercial Driver License Manual — § 2.4.1, “Seeing Ahead”

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