Louisiana CDL General Knowledge Practice Test (LA) 2

4.9 out of 5 (56 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you gearing up to ace your Louisiana CDL General Knowledge Test? Well, you're at the right spot! Introducing our second CDL practice test, a crucial stepping stone in your preparation. This test is an essential tool for anyone, regardless of whether you're aiming for a Class A or Class B driver's license or looking to add endorsements. Our Louisiana CDL general knowledge test practice, mirroring the DMV's format, is your key to understanding the breadth and depth of the knowledge required! The DMV practice test comprises 20 permit test questions, a mix that spans across vital topics like pre-trip vehicle inspection, basic vehicle control, gear shifting (yes, that includes downshifting!), managing hills and steep downgrades, effective communication with fellow drivers, speed control, and crucial awareness about drugs and alcohol. To pass, you'll need to correctly answer at least 16 questions. But here's where it gets interesting - our Louisiana CDL general knowledge practice test doesn't just throw random DMV questions at you. It's designed to cover a broad spectrum of subjects, ensuring that you're not just preparing for a written permit test but truly understanding the essentials of safe and responsible driving. Each time you take the CDL practice test, you'll encounter a new set of questions. This randomized approach keeps you on your toes, making sure you're learning the material, not just memorizing answers. Stay assured, our Louisiana CDL practice test is in sync with the latest 2026 guidelines and requirements, ensuring that you're getting the most up-to-date information. It's a dynamic tool, constantly refreshed to reflect any changes or new insights in the world of commercial driving. So, dive into this Louisiana DMV general knowledge practice test and gain the confidence and knowledge you need to pass in 2026! Remember, it's not just about passing the test; it's about becoming a skilled, aware, and responsible driver.
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Sample Louisiana CDL Test Questions - General Knowledge

Question 1

Which of the following can contribute to a commercial-vehicle fire?

  1. A Spilled fuel or the improper use of flares
  2. B Smoking, improper fueling, or loose fuel connections
  3. C Flammable, improperly loaded, or poorly ventilated cargo
  4. D All of the above

Correct answer: D – All of the above

Each listed condition is a recognized fire hazard. Spilled fuel and improperly used flares can start a fire after a collision. Smoking, fueling mistakes, loose fuel connections, flammable cargo, poor ventilation, and improperly sealed or loaded cargo can also cause or worsen a vehicle fire.

Source: Louisiana Commercial Driver License Manual — § 2.21.1, “Causes of Fire”

Question 2

Which cargo types require special handling because they can affect vehicle stability?

  1. A Dry bulk carried in tanks
  2. B Hanging meat
  3. C Livestock
  4. D All of the above

Correct answer: D – All of the above

All three loads need special attention. Dry bulk can shift in a high-center-of-gravity tank, hanging meat can swing, and livestock can move or lean during curves. These movements alter the vehicle's center of gravity and increase handling and rollover risks, particularly during turns.

Source: Louisiana Commercial Driver License Manual — § 3.4, “Cargo Needing Special Attention”

Question 3

On a one-way or divided highway in Louisiana, where should warning triangles be placed for a stopped commercial vehicle?

  1. A 10 feet, 100 feet, and 200 feet toward approaching traffic
  2. B 25 feet, 100 feet, and 250 feet toward approaching traffic
  3. C 50 feet, 100 feet, and 300 feet toward approaching traffic
  4. D 75 feet, 100 feet, and 400 feet toward approaching traffic

Correct answer: A – 10 feet, 100 feet, and 200 feet toward approaching traffic

On a one-way or divided highway, place all three warning devices toward approaching traffic. Position them approximately 10 feet, 100 feet, and 200 feet from the stopped commercial vehicle. Different placement applies on an undivided highway carrying traffic in both directions.

Source: Louisiana Commercial Driver License Manual — § 2.5.2, “Putting Out the Triangles”, 49 CFR § 392.22(b)(2)(ii) — Emergency Signals; Stopped Commercial Motor Vehicles

Question 4

Which brake defects should be identified during a vehicle inspection?

  1. A Cracked brake drums
  2. B Oil, grease, or brake fluid on shoes or pads
  3. C Missing, broken, or dangerously worn shoes or linings
  4. D All of the above

Correct answer: D – All of the above

All of these conditions can make the braking system unsafe. Inspect drums for cracks and examine shoes, pads, or linings for oil, grease, or brake-fluid contamination. Friction material must not be missing, broken, or worn dangerously thin.

Source: Louisiana Commercial Driver License Manual — § 2.1.4, “Bad Brake Drums or Shoes”

Question 5

What roadway pattern is shown by a right-first Reverse Turn warning sign?

This sign warns drivers to _____________.
  1. A A gradual right curve followed by a gradual left curve
  2. B One sharp turn to the right
  3. C One sharp turn to the left
  4. D A sharp right turn followed by a sharp left turn

Correct answer: D – A sharp right turn followed by a sharp left turn

The Reverse Turn sign warns of two turns in opposite directions, with the first turn matching the direction shown at the top of the symbol. A right-first sign indicates a right turn followed by a left turn. On Louisiana roadways, approach both turns at a speed that allows the vehicle to remain under control.

Source: Manual on Uniform Traffic Control Devices, 11th ed., Rev. 1 — § 2C.07, “Horizontal Alignment Signs (W1-1 through W1-5, W1-11, and W1-15)”

Question 6

Which action can help reduce stress while operating a commercial vehicle?

  1. A Drinking large amounts of coffee
  2. B Eating a heavy meal immediately before driving
  3. C Listening to calming music and giving the drive your full attention
  4. D Making personal phone calls while driving

Correct answer: C – Listening to calming music and giving the drive your full attention

A calm environment and full attention can help manage driving stress. The CDL manual recommends calming music, realistic travel-time expectations, and avoiding distractions such as phone conversations and eating. Large amounts of caffeine or a heavy meal are not substitutes for proper rest and focused driving.

Source: Louisiana Commercial Driver License Manual — § 2.10.2, “Don’t Be an Aggressive Driver”

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