North Carolina Tanker Endorsement Test (NC) 2026

4.8 out of 5 (182 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you gearing up for your NC CDL tanker endorsement test? Our NC CDL tanker test is your go-to resource for thorough preparation. This 20-question North Carolina DMV practice test is meticulously crafted to mirror the real DMV test, offering you an authentic practice experience. Covering vital topics such as liquid surge, weight distribution, emergency protocols, regulatory compliance, and vehicle inspection, this permit practice test ensures a comprehensive understanding of what it takes to operate tanker vehicles safely and efficiently. One of the critical aspects covered in this NC CDL practice test is the management of liquid surge. This phenomenon significantly impacts vehicle stability and handling, making it essential for any aspiring tanker driver to master. You'll find that our questions are not only designed to test your knowledge but also to help you understand the practical implications of liquid surge in real-world scenarios. The NC CDL tanker endorsement test also emphasizes the importance of conducting regular specialized inspections. Ensuring that the tank and vehicle components are in optimal condition is crucial for safety and compliance. Through this North Carolina driving test practice, you'll learn to identify potential issues before they become serious problems, keeping you and others on the road safe. Our permit test is enhanced with visual learning aids, including images that help illustrate complex concepts. These aids are particularly beneficial for visual learners, making it easier to grasp the material. Additionally, after completing the NC practice permit test, you can review your answers and get explanations for any questions you missed. This review process helps reinforce your learning and improves your chances of passing the real test. Whether you hold a commercial driver's license or a commercial learner's permit, this NC CDL tanker test is an essential tool for your preparation. Dive into the practice test today and get one step closer to earning your tanker endorsement.
FREE CDL Practice Test App
Pass your North Carolina CDL Tanker Endorsement test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample North Carolina Tanker Test Questions

Question 1

Which vehicle meets the CDL definition of a tank vehicle?

  1. A A CMV designed to carry liquid or gas in attached tanks, each over 119 gallons and totaling at least 1,000 gallons
  2. B Any vehicle carrying one portable 100-gallon tank
  3. C Any unbaffled trailer, regardless of tank capacity
  4. D A flatbed temporarily carrying an empty 1,000-gallon storage container not designed for transportation

Correct answer: A – A CMV designed to carry liquid or gas in attached tanks, each over 119 gallons and totaling at least 1,000 gallons

Federal CDL rules define a tank vehicle by the design and capacity of its attached tanks. Each qualifying tank must have a rated capacity greater than 119 gallons, and the tanks must have a combined rated capacity of at least 1,000 gallons. They may be permanently or temporarily attached. A qualifying liquid or gas does not have to be hazardous.

Source: North Carolina Commercial Driver License Manual — § 1, “Tank Vehicle (N)”, 49 CFR § 383.5 – Definitions

Question 2

Why must a driver use extra caution when operating a smooth-bore liquid tanker?

  1. A Its lack of baffles eliminates most liquid movement
  2. B Its strong forward-and-back liquid surge affects handling
  3. C Its baffles increase the force of liquid surge
  4. D Its empty weight is always greater than a baffled tank

Correct answer: B – Its strong forward-and-back liquid surge affects handling

A smooth-bore tanker is an unbaffled tank with nothing inside to slow the flow of liquid. As the vehicle starts or stops, the liquid can produce very strong forward-and-back surge. The manual directs drivers to operate these tankers very cautiously, particularly during starts and stops.

Source: North Carolina Commercial Driver License Manual — § 8.2.5, “Un-baffled Tanks”

Question 3

When required during the transfer of a Class 3 flammable liquid, what is the purpose of bonding or grounding conductors?

  1. A To operate the vehicle’s navigation system
  2. B To improve the cargo tank’s fuel economy
  3. C To neutralize possible static charges and prevent spark ignition
  4. D To support the weight of the transfer hose

Correct answer: C – To neutralize possible static charges and prevent spark ignition

Federal hazardous-materials rules require bonding or grounding in specified Class 3 flammable-liquid transfers to neutralize possible static charges. The required electrical connection is intended to protect against vapor ignition caused by a static-electricity discharge. Tank-vehicle inspections should confirm that required grounding and bonding equipment is present and working properly.

Source: North Carolina Commercial Driver License Manual — § 8.1.2, “Check Special Purpose Equipment”, 49 CFR § 177.837(b)–(c) – Class 3 (flammable liquid) materials

Question 4

Which condition causes liquid surge in a tank vehicle?

  1. A A driver adjusting the mirrors incorrectly
  2. B The vehicle having a high center of gravity
  3. C Liquid moving within a partially filled tank
  4. D A mechanical failure in the steering system

Correct answer: C – Liquid moving within a partially filled tank

Liquid surge results from the movement of cargo inside a partially filled tank. During a stop, the liquid may move back and forth and push the vehicle in the direction of the wave. A high center of gravity creates a separate rollover concern, but it is not the cause of liquid surge.

Source: North Carolina Commercial Driver License Manual — § 8.2.2, “Danger of Surge”

Question 5

What effect can a wet roadway have on a tank vehicle’s normal stopping distance?

  1. A It can double the stopping distance
  2. B It always triples the stopping distance
  3. C It always quadruples the stopping distance
  4. D It has no effect on stopping distance

Correct answer: A – It can double the stopping distance

Wet roads can double a commercial vehicle’s normal stopping distance. Reduced traction makes it harder to stop without skidding, requiring the driver to lower speed and leave additional space. Tank vehicle drivers must also brake well in advance and use steady pressure to control the effects of liquid surge.

Source: North Carolina Commercial Driver License Manual — § 8.3.4, “Stopping Distance”, North Carolina Commercial Driver License Manual — § 2.6.2, “Matching Speed to the Road Surface”

Question 6

A CMV carrying Division 1.1, 1.2, or 1.3 explosives must not be parked on or within how many feet of the traveled portion of a public road?

  1. A 5 feet
  2. B 10 feet
  3. C 25 feet
  4. D 50 feet

Correct answer: A – 5 feet

Federal hazardous-materials regulations prohibit parking a vehicle carrying Division 1.1, 1.2, or 1.3 materials on or within five feet of the traveled portion of a public street or highway. The North Carolina manual restates this five-foot restriction. Separate restrictions also govern parking near bridges, tunnels, buildings, and places where people gather.

Source: North Carolina Commercial Driver License Manual — § 9.6.1, “Parking with Division 1.1, 1.2, or 1.3 Explosives”, 49 CFR § 397.7(a)(1) – Parking

More North Carolina CDL Practice Tests
Other CDL Endorsements