Minnesota Tanker Endorsement Test (MN) 2026

4.8 out of 5 (108 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you ready to master the intricacies of handling tanker vehicles? Our MN permit test practice for tanker endorsements is your go-to resource. This carefully designed CDL tanker endorsement test features 20 thought-provoking questions, each crafted to evaluate and enhance your understanding of key concepts. Topics include the unique challenges of liquid surge, the critical aspects of weight distribution, emergency protocols, regulatory compliance, and comprehensive vehicle inspections. Every question in this Minnesota permit practice test is multiple choice, making it straightforward to navigate through each scenario. To pass, you need to answer at least 16 questions correctly, ensuring that you have a solid grasp of the essential knowledge needed for safe and efficient tanker operation. The MN DMV practice test also highlights the importance of regular inspections, emphasizing the need to keep both the tank and vehicle components in top-notch condition. This focus on maintenance ensures that you are well-prepared for any situation on the road. Taking this Minnesota CDL tanker practice test is a stress-free way to hone your skills. Unlike the high-pressure environment of the actual written permit test, this CDL tanker endorsement test allows you to learn and practice without any added stress. You can take your time to understand each question fully, which enhances your learning experience. One of the standout features of this MN CDL tanker test is the immediate feedback provided for each question. Whether you answer correctly or incorrectly, you receive a detailed explanation, helping you grasp the reasoning behind each answer. This approach not only reinforces your knowledge but also helps you identify areas that may need more focus. After completing the Minnesota permit test practice, you can review your answers and go over any hints and explanations for the questions you missed. This comprehensive review process is an excellent way to ensure that you are fully prepared for the actual test. Whether you're holding a commercial driver's license or a commercial learner's permit, our MN CDL tanker practice test is an invaluable tool for your preparation. Get ready to gain the confidence and skills needed to excel in your tanker vehicle endorsement test.
FREE CDL Practice Test App
Pass your Minnesota CDL Tanker Endorsement test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample Minnesota Tanker Test Questions

Question 1

In tank-vehicle terminology, what is a “smooth-bore” tank?

  1. A A tank divided into several separate compartments
  2. B A tank equipped with internal baffles
  3. C An unbaffled tank
  4. D A tank fitted with extra insulation

Correct answer: C – An unbaffled tank

A smooth-bore tank is an unbaffled liquid tank. Because it has no internal structures to slow the liquid, forward-and-back surge can be very strong. Drivers must be especially slow and careful when starting or stopping a smooth-bore tanker.

Source: Minnesota Commercial Driver’s License Manual — § 8.2.5, “Un-baffled Tanks”

Question 2

Which two characteristics require extra care when operating a liquid tank vehicle?

  1. A A greater chance of leaks and unusually low ground clearance
  2. B A high center of gravity and the weight of the bulkheads
  3. C Longer vehicle length and reduced tire pressure
  4. D A high center of gravity and movement of the liquid

Correct answer: D – A high center of gravity and movement of the liquid

Liquid tank vehicles require special handling because they have a high center of gravity and because the liquid moves inside the tank. The high center of gravity makes the vehicle top-heavy and easier to roll. Liquid surge can also affect handling during starts, stops, turns, and lane changes.

Source: Minnesota Commercial Driver’s License Manual — § 8.2, “Driving Tank Vehicles”

Question 3

Besides a high center of gravity, what makes hauling liquids in a tank vehicle require special driving skills?

  1. A Low tire pressure
  2. B Movement of the liquid
  3. C Narrow roadway lanes
  4. D Higher permitted speeds

Correct answer: B – Movement of the liquid

Liquid movement can change how a tank vehicle handles. In a partially filled tank, the cargo may surge forward, backward, or sideways as the vehicle starts, stops, or turns. Together with the vehicle’s high center of gravity, this movement increases the need for smooth control and careful speed selection.

Source: Minnesota Commercial Driver’s License Manual — §§ 8.2–8.2.2, “Driving Tank Vehicles”; “Danger of Surge”

Question 4

Before loading, unloading, or moving a tank vehicle, what must you verify about the intake, discharge, and cut-off valves?

  1. A All valves are open
  2. B All valves are closed
  3. C All valves have been removed for cleaning
  4. D Each valve is in the correct position for the intended operation

Correct answer: D – Each valve is in the correct position for the intended operation

The driver must check the intake, discharge, and cut-off valves and confirm that they are in the correct position. The proper setting depends on the operation being performed, so the valves should not automatically be assumed to belong in either the open or closed position. Tank bodies, hoses, connections, covers, and vents should also be inspected.

Source: Minnesota Commercial Driver’s License Manual — § 8.1.1, “Leaks”

Question 5

How should a tank vehicle be driven through a curve?

  1. A Accelerate before entering the curve
  2. B Slow before the curve, then accelerate slightly through it
  3. C Enter at the posted speed without adjustment
  4. D Wait until inside the curve to brake firmly

Correct answer: B – Slow before the curve, then accelerate slightly through it

Reduce speed before entering the curve, then accelerate slightly while traveling through it. Tank vehicles may roll over even at speeds posted as safe for other vehicles, so the approach speed may need to be well below the posted limit. Avoid entering too fast or relying on braking inside the curve.

Source: Minnesota Commercial Driver’s License Manual — § 8.3.3, “Curves”, Minnesota Commercial Driver’s License Manual — § 8.2.1, “High Center of Gravity”

Question 6

If a fire starts on a tank vehicle while you are driving, what should you do first?

  1. A Begin using the extinguisher before stopping
  2. B Get off the roadway and stop in an open area away from things that could catch fire
  3. C Drive into the nearest service station
  4. D Continue driving until a mechanic is available

Correct answer: B – Get off the roadway and stop in an open area away from things that could catch fire

The first step is to get the vehicle off the road and stop in an open area. Park away from buildings, trees, brush, other vehicles, and anything else that could catch fire. Do not pull into a service station; notify emergency services of the problem and your location.

Source: Minnesota Commercial Driver’s License Manual — § 2.21.3, “Fire Fighting”

More Minnesota CDL Practice Tests
Other CDL Endorsements