South Carolina Tanker Endorsement Test (SC) 2026

4.9 out of 5 (99 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Get ready for the SC CDL tanker test with our comprehensive study tool, designed to equip you with the knowledge and confidence needed to ace the test. This online resource offers you 24/7 access to expertly crafted questions that focus on critical aspects of tanker vehicle operation, such as liquid surge, weight distribution, emergency protocols, regulatory compliance, and vehicle inspection. With the freedom to study on your schedule, you can dive into the content at your convenience, allowing you to focus on areas that need improvement without the constraints of a classroom environment. The SC DMV practice test offers a robust evaluation of your skills and understanding. Our test delves deeply into the challenges posed by liquid surge, a phenomenon that significantly affects the stability and handling of tanker vehicles. By focusing on this and other essential topics, you'll develop a comprehensive understanding of what it takes to operate a tanker vehicle safely and efficiently. You'll be equipped to handle the nuances of tanker driving, from managing weight distribution to executing emergency protocols with precision. While some may be tempted to use shortcuts like "DMV test cheat sheets," these resources often promise more than they can deliver and can even lead to costly mistakes. Our South Carolina permit practice test stands out as a reliable and effective study tool that emphasizes genuine learning and skill development. With a track record of helping countless drivers succeed, our test is both a lawful and wise choice. Designed with flexibility in mind, the SC tanker endorsement test allows you to identify and address any gaps in your knowledge. You can retake the test multiple times to track your progress and ensure you're ready for the real test. Whether you're working towards a commercial driver's license or holding a commercial learner's permit, this CDL tanker endorsement test is an invaluable resource in your preparation journey. Trust in a proven method that empowers you to achieve your goals and secure your future on the road.
FREE CDL Practice Test App
Pass your South Carolina CDL Tanker Endorsement test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample South Carolina Tanker Test Questions

Question 1

A dense liquid may cause a tanker to reach its legal weight limit before the tank is filled to capacity.

  1. A TRUE
  2. B FALSE

Correct answer: A – TRUE

A full tank of a dense liquid, such as certain acids, may exceed legal gross or axle-weight limits. A tank carrying a heavy liquid may need to be only partially filled. The permissible amount depends on the liquid’s weight, its expansion during transportation, and the applicable vehicle weight limits.

Source: South Carolina Commercial Driver’s License Manual – 2025 CDL Testing System — § 8.2.7, “How Much to Load?”

Question 2

To reduce a tank vehicle’s rollover risk, its center of gravity should be kept:

  1. A High
  2. B Low
  3. C Toward the rear
  4. D Toward the front

Correct answer: B – Low

Keeping weight as low as possible reduces top-heaviness and improves vehicle stability. A high center of gravity makes a tanker easier to roll over, particularly on curves, ramps, and during abrupt steering. Tank vehicles may overturn at posted curve speeds, so drivers should also take curves well below the posted speed.

Source: South Carolina Commercial Driver’s License Manual – 2025 CDL Testing System — § 3.2.3, “Don’t Be Top-heavy”, South Carolina Commercial Driver’s License Manual – 2025 CDL Testing System — § 8.2.1, “High Center of Gravity”

Question 3

For a Class A or B vehicle with tanks totaling at least 1,000 gallons, each qualifying tank must have an individual rated capacity of more than how many gallons?

  1. A 50 gallons
  2. B 75 gallons
  3. C 100 gallons
  4. D 119 gallons

Correct answer: D – 119 gallons

The federal tank-vehicle definition covers attached tanks with an individual rated capacity greater than 119 gallons and a combined rated capacity of at least 1,000 gallons. A tank endorsement is required when a Class A or B CDL vehicle meets those conditions. The South Carolina CDL manual uses the same individual and aggregate capacity thresholds.

Source: South Carolina Commercial Driver’s License Manual – 2025 CDL Testing System — § 8, “Tank Vehicles”, 49 CFR § 383.5 — Definitions: “Tank Vehicle”

Question 4

Why should a tanker driver maintain steady brake pressure after stopping, even on level ground?

  1. A To prevent the engine from stalling
  2. B To cool the service brakes
  3. C Liquid surge may push the vehicle forward or backward
  4. D To keep the suspension level

Correct answer: C – Liquid surge may push the vehicle forward or backward

Liquid in a partially filled tank continues surging forward and backward as the vehicle stops. When the wave strikes an end of the tank, it pushes the vehicle in the same direction. Steady brake pressure helps control this movement; releasing the brakes too soon can allow the tanker to move after the initial stop.

Source: South Carolina Commercial Driver’s License Manual – 2025 CDL Testing System — §§ 8.2.2 and 8.3.2, “Danger of Surge” and “Controlling Surge”

Question 5

Which items may be included as special-purpose equipment on a tank vehicle?

  1. A Grounding and bonding cables
  2. B Vapor-recovery equipment
  3. C Emergency shut-off systems
  4. D All of the above

Correct answer: D – All of the above

Special-purpose tanker equipment may include vapor-recovery kits, grounding and bonding cables, emergency shut-off systems, and a built-in fire extinguisher. Not every tank vehicle has every listed item. During inspection, the driver must identify the equipment installed on that vehicle and make sure it works properly.

Source: South Carolina Commercial Driver’s License Manual – 2025 CDL Testing System — § 8.1.2, “Check Special Purpose Equipment”

Question 6

Baffles in a liquid tank do not normally control surge in which direction?

  1. A Up and down
  2. B Side to side
  3. C Forward and backward
  4. D Equally in every direction

Correct answer: B – Side to side

Baffled tanks contain bulkheads with openings that allow liquid to flow through. These baffles help control forward-and-backward surge, particularly during acceleration and braking. Side-to-side surge can still occur during turns or sudden steering and can contribute to a rollover.

Source: South Carolina Commercial Driver’s License Manual – 2025 CDL Testing System — § 8.2.4, “Baffled Tanks”

More South Carolina CDL Practice Tests
Other CDL Endorsements