CDL Tanker Test 2025 Questions and Answers

CDL Tanker Test 2025 Questions and Answers: Try our free CDL Tank Endorsement Practice Test Online. You must pass the CDL Tanker knowledge test for driving a tank vehicle. A “tank vehicle” is used to carry any liquid or liquid gas in a tank of 1,000 gallons or more. (This endorsement is also needed for dry bulk tankers.)

Before loading, unloading, or driving a tanker, inspect the vehicle. This ensures that the vehicle is safe to carry the liquid or gas and is safe to drive. A tank endorsement is also required for Class C vehicles when the vehicle is used to transport hazardous materials in liquid or gas form in the rated tanks.

CDL Tanker Test 2025 Questions and Answers

Test Name	CDL Practice Test 2025
Language	English
License	Endorsements Permit
Total Questions	30 Questions and Answers
Test For	Commercial Driver License
Test Preparation	Tank Endorsement Endorsements
Country	USA
Explanation	No

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CDL Tanker Test

1 / 30

A tank vehicle’s high center of gravity makes which of the following especially dangerous?

A) Going uphill.

B) Taking highway curves.

C) Coming to a stop.

D) Driving on wet roads.

2 / 30

What is outage?

A) The horsepower required to haul a liquid tanker

B) Liquid that is leaking from a liquid tanker

C) Liquid that is traveling through a bulkhead between two small tanks

D) The room that is allowed in a tank above the liquid load for expansion

3 / 30

Tank B is called a

A) conventional tank.

B) low-capacity tank.

C) round-bodied tank.

D) low-profile tank.

4 / 30

You are loading 3 different liquids that must not be mixed into Tank A. Which 3 compartments should you use?

A) Compartments 2, 3, and 4

B) Compartments 1, 3, and 5

C) Compartments 1, 2, and 3

D) Compartments 3, 4, and 5

5 / 30

When you are coming to a sudden stop, the liquid in a tanker will

A) surge backward and forward.

B) splash up and down.

C) surge from side to side.

D) stop moving suddenly.

6 / 30

Tank A and Tank B are the same length. Which of the following is true?

A) Tank A will require more outage than Tank B.

B) Tank A and Tank B can carry the same number of gallons.

C) Tank A can carry more liquid than Tank B.

D) Tank B can carry more liquid than Tank A.

7 / 30

The design of Tank B will not affect handling in which circumstance?

A) Turning

B) Accelerating

C) Stopping

D) Starting

8 / 30

What is surge?

A) The amount a liquid expands when heated.

B) Movement of liquid in a partially filled tanker.

C) None of the above

D) Acceleration of a truck caused by movement of its load.

9 / 30

You are filling a liquid tanker. Besides the outage requirement, what else must you consider in determining the amount of liquid you can legally carry?

A) The weight of the liquid.

B) The speed you will be traveling.

C) The distance you will be traveling.

D) Whether the tanker is baffled or unbaffled.

10 / 30

Tests have shown that tankers can turn over

A) when taking a curve at the posted speed.

B) when taking a curve above the posted speed.

C) while driving on icy roads.

D) while being loaded.

11 / 30

Which of the following is more dangerous when driving an unbaffled tank than when driving a baffled tank?

A) Stopping suddenly

B) Leaving the highway via a curved off-ramp

C) Going up a steep hill

D) Changing lanes on a highway

12 / 30

Why do baffles make handling a liquid tank vehicle easier?

A) They help control forward and backward surge.

B) They put more weight on the front and rear of the vehicle.

C) They lower the center of gravity.

D) They help control side-to-side surge.

13 / 30

Tank A was moving forward and has just stopped. The liquid surge will push the tank first in which direction?

A) Forward

B) To the left

C) Backward

D) To the right

14 / 30

Which of the following is a true statement?

A) Tank A will be less likely to roll over when taking curves.

B) None of the above

C) Tank A is safer than Tank B.

D) Tank A has a lower center of gravity than Tank B.

15 / 30

An unbaffled tank is also called a

A) low-profile tank.

B) conventional tank.

C) liquid tank.

D) smoothbore tank.

16 / 30

Which of the following is an unbaffled liquid tanker most likely to be carrying?

A) Dry cement

B) Milk

C) Gasoline

D) Liquid nitrogen

17 / 30

Which of the following would Tank B be least likely to carry?

A) Orange juice

B) Gasoline

C) Liquid propane

D) Acid

18 / 30

Forward and backward surge is especially strong when a tanker is

A) unbaffled.

B) baffled

C) going up a hill.

D) turning a corner.

19 / 30

You need special skills if you are hauling liquids because of the

A) weight of the vehicle.

B) length of the vehicle.

C) movement of liquid in the tank.

D) loaded tanker’s low center of gravity.

20 / 30

The amount of liquid you can legally carry does

A) legal weight limits.

B) the liquid’s weight.

C) the amount the liquid will expand in transit.

D) the distance to be traveled.

21 / 30

Compared to a low-profile tank, a conventional tank is always

A) safer

B) more top-heavy.

C) heavier

D) wider

22 / 30

A tank vehicle is a vehicle used to transport

A) military equipment.

B) hazardous liquids.

C) gasoline or other petroleum products.

D) any liquid or liquefied gaseous material.

23 / 30

Which tank in the figure above is specially designed to reduce liquid surge?

A) All of the above

B) Tank C

C) Tank B

D) Tank A

24 / 30

What device divides a liquid tank into several smaller tanks?

A) A baffle

B) A bulkhead

C) A smooth bore

D) None of the above

25 / 30

Sanitation regulations forbid the use of baffles when transporting food products. Why?

A) Because baffles would increase the motion of the liquid.

B) Because an unbaffled tank can be driven at higher speeds and less time will be needed for transporting the load.

C) Because of the difficulty of cleaning the inside of a baffled tank.

D) None of the above

26 / 30

When a tank vehicle comes to a stop, liquid will surge back and forth. When the wave hits one end of the tank, the truck will

A) None of the above

B) rollover.

C) be pushed in the direction opposite the direction the wave was moving.

D) be pushed in the direction the wave was moving.

27 / 30

Tankers carrying liquids can ______ more easily than other vehicles.

A) stop

B) turn

C) oll over

D) ascend a hill

28 / 30

When carrying liquids, you should take an off-ramp curve at a speed

A) slightly below the posted speed.

B) well below the posted speed.

C) at the posted speed.

D) slightly above the posted speed.

29 / 30

A portable tank having a capacity of at least ________ is considered a tank vehicle.

A) 1,000 pounds

B) 100 pounds

C) 1,000 gallons

D) 100 gallons

30 / 30

When loading a 5-compartment tank with different liquids, which of the following should you do?

A) Fill each compartment as full as possible.

B) Fill the last compartment highest.

C) Distribute the weight evenly.

D) Fill the first compartment highest.

Your score is

The average score is 78%

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