Tennessee General Knowledge CDL Prep Test (TN) 4

5 out of 5 (30 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Dive into our Tennessee General Knowledge CDL Prep Test, the ideal starting point for aspiring commercial drivers in the Volunteer State. As the fourth DMV permit practice test in our series, it offers a structured approach to mastering the essentials of commercial driving. With 20 meticulously crafted DMV written test questions, the prep test demands a minimum score of 16 to pass, ensuring a comprehensive understanding of the necessary knowledge. What sets this TN CDL prep test apart is its diverse array of permit test questions, ensuring no stone is left unturned in your preparation. Our extensive question pool covers a broad spectrum of topics, equipping you with the knowledge to tackle the DMV test confidently in 2026! Tailored specifically to Tennessee, this CDL practice test reflects the state's unique driving laws, regulations, and road signs. It's an invaluable resource for anyone looking to navigate the roads of Tennessee legally and safely. We understand that effective learning comes from understanding not just what the right answers are but why they're right. That's why our TN DMV permit practice test provides immediate feedback and detailed explanations for each question. This approach not only clarifies your doubts but also deepens your understanding, making your study sessions as productive as possible. So, if you're aiming to ace your Tennessee CDL permit test in 2026, our fourth DMV practice test is the tool you need. Test your knowledge, sharpen your skills, and get ready to hit the road with confidence!
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Sample Tennessee CDL Test Questions - General Knowledge

Question 1

Why is selecting and shifting into the proper gear important?

  1. A. It keeps the engine at a fixed temperature
  2. B. It directly cools the radiator
  3. C. It maintains oil flow through the crankcase
  4. D. It helps the driver maintain vehicle control

Correct answer: D. – It helps the driver maintain vehicle control

Proper gear selection helps the driver maintain control of a commercial vehicle. If the transmission cannot be placed in the correct gear while driving, control is reduced. Drivers should know the appropriate engine-speed and road-speed ranges for each gear and complete shifts without remaining in neutral too long.

Source: Tennessee Commercial Driver’s License Manual — § 2.3, “Shifting Gears”

Question 2

What effect does a bridge formula have when axles are positioned closer together?

  1. A. It permits more weight on the closely spaced axles
  2. B. It permits less maximum weight on the closely spaced axle group
  3. C. It allows the same weight regardless of axle spacing
  4. D. It replaces the vehicle’s gross weight rating

Correct answer: B. – It permits less maximum weight on the closely spaced axle group

A bridge formula limits the weight carried by groups of consecutive axles according to axle spacing. Axles that are closer together are generally permitted less combined weight because the load is concentrated over a shorter distance. The federal Bridge Gross Weight Formula applies on the Interstate System and does not replace the vehicle manufacturer’s weight ratings.

Source: Tennessee Commercial Driver’s License Manual — § 3.2.2, “Legal Weight Limits”, 23 CFR § 658.17(e) – Weight

Question 3

Which group consists of steering-system components?

  1. A. Tires, rims, and lug nuts
  2. B. Leaf springs, air bellows, and spring hangers
  3. C. Brake chambers, slack adjusters, and pushrods
  4. D. Steering box, tie rods, and connecting links

Correct answer: D. – Steering box, tie rods, and connecting links

During a Tennessee CDL vehicle inspection, steering components include the steering box and the links, arms, and rods connecting it to the wheels. Check the linkage for wear or cracks and inspect its joints and sockets for looseness. Nuts, bolts, and cotter keys must also be present and secure.

Source: Tennessee Commercial Driver’s License Manual — § 11.2.1, “Steering”

Question 4

Every hazardous material may be loaded and unloaded using the same procedure.

  1. A. TRUE
  2. B. FALSE

Correct answer: B. – FALSE

Federal hazardous-materials rules do not prescribe one procedure for every shipment. General precautions apply, but additional requirements vary by hazard and packaging. Explosives, corrosives, flammable liquids, compressed gases, and radioactive materials require different handling precautions during loading or unloading.

Source: Tennessee Commercial Driver’s License Manual — § 9.4, “Loading and Unloading”, 49 CFR Part 177 — Carriage by Public Highway

Question 5

Which statement about driver fatigue is correct?

  1. A. Coffee can replace the need for sleep
  2. B. Stimulants eliminate fatigue safely
  3. C. Sitting upright prevents a person from falling asleep
  4. D. Adequate rest is the only real cure for fatigue

Correct answer: D. – Adequate rest is the only real cure for fatigue

The Tennessee CDL manual states that rest is the only cure for fatigue. If warning signs such as heavy eyelids, repeated yawning, lane drifting, or trouble focusing appear, stop driving at a safe place. Sleeping for the night or taking a short nap is safer than trying to push through the fatigue.

Source: Tennessee Commercial Driver’s License Manual — § 2.11, “Night Driving & Driver Fatigue,” “Warning Signs of Fatigue”, Tennessee Commercial Driver’s License Manual — § 2.22.2, “Other Drugs”

Question 6

What commonly causes a combination vehicle to roll over?

  1. A. Entering a turn too fast
  2. B. Driving only on wet pavement
  3. C. Operating mainly at night
  4. D. Taking a turn too slowly

Correct answer: A. – Entering a turn too fast

Rollovers occur when a driver takes a turn too fast for the vehicle and load. Combination vehicles should be driven slowly around corners, ramps, and off-ramps. Keeping cargo low and centered also improves stability, while sudden steering or quick lane changes can increase rollover risk.

Source: Tennessee Commercial Driver’s License Manual — § 6.1.1, “Prevent Rollovers”

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