North Carolina General Knowledge CDL Prep Test (NC) 4

5 out of 5 (66 votes)
80% Passing score
20 Questions
4 Mistakes allowed
As a North Carolinian, it's essential to know that obtaining your Commercial Driver's License (CDL) is a significant step forward in your professional driving career. That's where our fourth NC CDL prep test, available on our website, plays a crucial role. This particular CDL practice test is designed to simulate the real DMV written test, providing you with an opportunity to test your knowledge in a calm and supportive environment. The fourth North Carolina general knowledge CDL prep test features 20 carefully selected written test questions and answers. You need to correctly answer at least 16 to pass, mirroring the standards of the actual DMV permit test in 2026. However, unlike the written test, our NC CDL practice test offers a no-pressure environment. It's a space where making mistakes is part of the learning process, not something that costs you your license. One of the unique aspects of our NC CDL prep practice tests is the use of visual learning aids. These include images of road signs and various traffic scenarios, which are incredibly beneficial for those who find visual learning more effective. This approach helps solidify the knowledge required for the North Carolina DMV test in 2026 and enhances your understanding of practical driving scenarios. Another key feature of our DMV practice tests is the professional expertise behind them. Each permit test question has been meticulously written and reviewed by seasoned driving instructors. These professionals bring decades of experience in teaching and have assisted thousands in successfully obtaining their CDLs. Their insight ensures that the DMV questions are not only relevant but also up-to-date with the latest driving regulations and standards. So, whether you're gearing up for your first attempt or looking to refine your knowledge before the actual North Carolina DMV CDL test in 2026, our fourth CDL practice test is an invaluable tool in your preparation arsenal in 2026. It's more than just a permit practice test; it's a stepping stone towards achieving your goal of becoming a licensed commercial driver in North Carolina!
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Sample North Carolina CDL Test Questions - General Knowledge

Question 1

Before backing with a helper, which hand signal is essential for both people to agree upon?

  1. A Slow down
  2. B Pull forward
  3. C Back straight
  4. D Stop

Correct answer: D – Stop

The driver and helper must agree on a clear stop signal before backing begins. The helper should stand near the rear of the vehicle where the driver can see them. Predetermined signals reduce confusion while the driver monitors the backing path and blind spots.

Source: North Carolina Commercial Driver License Manual — § 2.2.2, “Backing Safely”

Question 2

At a North Carolina intersection with stop signs on every approach, what must you do before proceeding?

  1. A Come to a complete stop and proceed with caution only when the way is clear
  2. B Yield only to vehicles approaching from the left
  3. C Make a rolling stop if you reached the intersection first
  4. D Enter according to arrival order without checking other traffic

Correct answer: A – Come to a complete stop and proceed with caution only when the way is clear

At an intersection controlled by stop signs on three or more approaches, each driver must make the required complete stop. After stopping, a driver may proceed with caution only when the movement can be made safely. Stop at the marked stop line or, if none exists, at the location specified for the crosswalk or intersection.

Source: North Carolina Driver Handbook — Ch. 4, “Right-of-Way at Intersections”, N.C. Gen. Stat. § 20-158(a)(1), (b)(1), (b)(5) – Vehicle control signs and signals

Question 3

To leave enough room for changing traffic conditions, how far ahead should you scan while driving a CMV?

  1. A 1 to 2 seconds
  2. B 5 to 8 seconds
  3. C 12 to 15 seconds
  4. D 18 to 21 seconds

Correct answer: C – 12 to 15 seconds

The North Carolina manual recommends looking at least 12 to 15 seconds ahead—the distance your vehicle will travel during that time. This equals about one block at lower speeds and about one-quarter mile at highway speeds. Continue shifting your attention between nearby conditions and the road farther ahead.

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

Question 4

Before driving a CMV after taking an over-the-counter cold medicine, which condition must be true?

  1. A You took no more than half the recommended dose
  2. B The medicine does not cause drowsiness or impair safe driving
  3. C You will drive only during daylight
  4. D Your dispatcher approved the medicine

Correct answer: B – The medicine does not cause drowsiness or impair safe driving

The North Carolina manual warns that over-the-counter cold medicines may cause drowsiness or otherwise interfere with safe driving. Federal regulation 49 CFR § 392.4 prohibits using any substance to a degree that makes a driver incapable of safely operating a vehicle. A smaller dose, daylight driving, or dispatcher approval does not establish that the medicine is safe.

Source: North Carolina Commercial Driver License Manual — § 2.22.2, “Other Drugs”, 49 CFR § 392.4(a)(4), (c) — Drugs and Other Substances

Question 5

Compared with the same truck when fully loaded, which condition may require more stopping distance because tire traction is lower?

  1. A Fully loaded
  2. B Completely empty
  3. C Partially loaded
  4. D All loading conditions require the same distance

Correct answer: B – Completely empty

An empty truck may require more stopping distance because it has less traction than the same truck when fully loaded. Reduced tire-to-road friction makes skidding more likely during braking. Drivers should not assume that an empty vehicle will stop more quickly simply because it weighs less.

Source: North Carolina Commercial Driver License Manual — § 2.6.1, “Speed and Stopping Distance”

Question 6

Under comparable conditions, doubling your speed makes your braking distance approximately how many times longer?

  1. A 3 times
  2. B 2 times
  3. C 4 times
  4. D 5 times

Correct answer: C – 4 times

When speed doubles, braking distance becomes approximately four times longer under comparable conditions. For example, increasing speed from 20 mph to 40 mph produces about four times the braking distance. This relationship concerns braking distance, while total stopping distance also includes perception and reaction distance.

Source: North Carolina Commercial Driver License Manual — § 2.6.1, “Speed and Stopping Distance”

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