Tennessee CDL Practice Test: General Knowledge (TN) 6

5 out of 5 (51 votes)
80% Passing score
50 Questions
10 Mistakes allowed
Dive into your sixth Tennessee CDL practice test, tailored specifically for Tennessee, where mastering the General Knowledge segment becomes a pivotal step in your preparation journey. This DMV practice permit test, featuring 50 meticulously crafted CDL test questions and answers, is designed to mirror the real DMV challenge, requiring a minimum of 40 correct answers to pass. It''s an invaluable opportunity to deepen your understanding of essential topics, ranging from vehicle equipment nuances to emergency procedures, accident protocols, and even a foundational knowledge of hazardous materials, which is vital for every aspiring commercial driver. This TN CDL permit practice test isn't just another quiz; it's a comprehensive Tennessee-specific preparation tool. It's fine-tuned to the state's unique driving regulations, road signs, and protocols, offering a deep dive into the specifics that make Tennessee roads safe and your driving experience compliant. Engaging with this CDL practice test means immersing yourself in the real-world scenarios and knowledge areas you'll encounter on the actual DMV test in 2026. While this Tennessee CDL practice test serves as a robust preparation tool, it's important to remember that it complements, rather than replaces, mandatory driver's education courses. In Tennessee, as in many states, completing a state-certified driver's education or ELDT course is a prerequisite for obtaining a CDL. This DMV CDL practice test is designed to work alongside such courses, helping learners to reinforce their knowledge, identify areas needing attention, and ensure a well-rounded preparation. By integrating this Tennessee DMV practice test into your study routine, you're taking a proactive step towards success. It's not just about passing the CDL permit test in 2026; it's about becoming a knowledgeable, safe, and confident driver. You're not just studying; you're preparing to excel, to understand the intricacies of commercial driving, and to step confidently into your role on Tennessee's roads. When the day comes to take your real DMV drivers permit test, you'll know it's not just another hurdle - it's a milestone in your professional driving career, one that you're fully prepared to achieve with flying colors!
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Sample Tennessee CDL Test Questions - General Knowledge

Question 1

When should you select a lower range in an automatic transmission for a downgrade?

  1. A Before beginning the descent
  2. B After the vehicle gains excessive speed
  3. C While midway through a curve
  4. D After reaching the bottom of the grade

Correct answer: A – Before beginning the descent

The Tennessee CDL manual directs drivers to select the proper lower gear before starting down a hill. A lower range provides greater engine braking and limits unwanted upshifting beyond the selected gear. Waiting until the vehicle has accelerated downhill can make it difficult or impossible to shift into the appropriate range safely.

Source: Tennessee Commercial Driver’s License Manual — § 2.3.1, “Basic Procedures for Shifting Down”; § 2.3.3, “Automatic Transmissions”

Question 2

What is the primary reason for inspecting a commercial vehicle?

  1. A To complete required paperwork more quickly
  2. B To protect the driver and other road users
  3. C To examine only the vehicle’s lights
  4. D To find overinflated tires only

Correct answer: B – To protect the driver and other road users

Safety is the most important reason for conducting a vehicle inspection. Finding defective steering, brakes, tires, lights, coupling equipment, or other components before driving can prevent a roadside breakdown or crash. Inspections also help ensure that unsafe vehicles are repaired before being placed into service.

Source: Tennessee Commercial Driver’s License Manual — § 2.1.1, “Why Inspect”

Question 3

A yellow right-curve warning sign has a 40 MPH advisory plaque. What does the plaque indicate?

This sign warns drivers to _______________.
  1. A Vehicles below 40 mph must use the right lane
  2. B Drivers must maintain at least 40 mph
  3. C The recommended operating speed for the curve is 40 mph
  4. D Drivers should accelerate above 40 mph before the curve

Correct answer: C – The recommended operating speed for the curve is 40 mph

An advisory-speed plaque indicates the recommended operating speed for the roadway condition shown on the accompanying warning sign. Here, 40 mph is the advised speed for the right-hand curve. Commercial drivers may need to travel more slowly when vehicle size, cargo, weather, or road conditions require additional caution.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways, 11th ed. — § 2C.59, “Advisory Speed Plaque (W13-1P)”

Question 4

You notice a small cardboard box in your lane. What should you do?

  1. A Stop in the traffic lane and direct vehicles around it
  2. B Strike it deliberately to move it off the road
  3. C Avoid it if you can do so without a sudden or unsafe maneuver
  4. D Line it up with the left steering tire

Correct answer: C – Avoid it if you can do so without a sudden or unsafe maneuver

The Tennessee CDL manual warns that cardboard boxes, paper sacks, and cloth bags may contain solid or heavy objects. Scan far enough ahead to identify roadway debris early. If avoidance is necessary, steer around the object only when the maneuver can be completed without sudden braking, swerving, or creating another hazard.

Source: Tennessee Commercial Driver’s License Manual — § 2.8.2, “Hazardous Roads,” “Foreign Objects”

Question 5

At operating rpm, what air-pressure buildup is expected within 45 seconds in a typical dual-air system?

  1. A From 85 to 100 psi
  2. B From 40 to 60 psi
  3. C From 60 to 80 psi
  4. D From 100 to 120 psi

Correct answer: A – From 85 to 100 psi

For the air-pressure buildup check, a typical dual-air system should rise from 85 to 100 psi within 45 seconds while the engine operates at operating rpm. Vehicles with larger-than-minimum air tanks may require more time and still be safe, so the manufacturer’s specifications must also be checked. Do not drive if pressure builds too slowly.

Source: Tennessee Commercial Driver’s License Manual — § 5.3, “Inspecting Air Brake Systems,” “Check Rate of Air Pressure Buildup”

Question 6

Which hazard should you watch for while traveling through a roadway work zone?

  1. A Workers only, because the road itself remains unchanged
  2. B Narrow lanes, uneven pavement, and sharp drop-offs
  3. C A mandatory stop before every work-zone entrance
  4. D A need to increase speed to clear congestion

Correct answer: B – Narrow lanes, uneven pavement, and sharp drop-offs

The Tennessee CDL manual identifies narrow lanes, sharp turns, uneven surfaces, workers, and construction vehicles as work-zone hazards. Observe posted speed limits and reduce speed further when road, weather, or traffic conditions require it. Watch carefully for pavement drop-offs because crossing one may tilt the vehicle or make steering difficult.

Source: Tennessee Commercial Driver’s License Manual — § 2.6.7, “Roadway Work Zones”; § 2.8.2, “Hazardous Roads,” “Work Zones” and “Drop Off”

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