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

Tank B is called a

A) conventional tank.

B) low-profile tank.

C) round-bodied tank.

D) low-capacity tank.

2 / 30

What device divides a liquid tank into several smaller tanks?

A) A bulkhead

B) A baffle

C) None of the above

D) A smooth bore

3 / 30

What is outage?

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

B) Liquid that is leaking from a liquid tanker

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

D) The horsepower required to haul a liquid tanker

4 / 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 speed you will be traveling.

B) The distance you will be traveling.

C) The weight of the liquid.

D) Whether the tanker is baffled or unbaffled.

5 / 30

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

A) Dry cement

B) Liquid nitrogen

C) Gasoline

D) Milk

6 / 30

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

A) Fill the first compartment highest.

B) Fill each compartment as full as possible.

C) Distribute the weight evenly.

D) Fill the last compartment highest.

7 / 30

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

A) Liquid propane

B) Acid

C) Gasoline

D) Orange juice

8 / 30

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

A) loaded tanker’s low center of gravity.

B) movement of liquid in the tank.

C) length of the vehicle.

D) weight of the vehicle.

9 / 30

Forward and backward surge is especially strong when a tanker is

A) turning a corner.

B) unbaffled.

C) going up a hill.

D) baffled

10 / 30

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

A) Backward

B) Forward

C) To the right

D) To the left

11 / 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

12 / 30

Tests have shown that tankers can turn over

A) while driving on icy roads.

B) when taking a curve at the posted speed.

C) while being loaded.

D) when taking a curve above the posted speed.

13 / 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.

14 / 30

Why do baffles make handling a liquid tank vehicle easier?

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

B) They help control forward and backward surge.

C) They lower the center of gravity.

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

15 / 30

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

A) Coming to a stop.

B) Taking highway curves.

C) Driving on wet roads.

D) Going uphill.

16 / 30

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

A) 100 pounds

B) 1,000 pounds

C) 100 gallons

D) 1,000 gallons

17 / 30

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

A) Compartments 1, 2, and 3

B) Compartments 3, 4, and 5

C) Compartments 2, 3, and 4

D) Compartments 1, 3, and 5

18 / 30

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

A) None of the above

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

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

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

19 / 30

The amount of liquid you can legally carry does

A) the liquid’s weight.

B) legal weight limits.

C) the distance to be traveled.

D) the amount the liquid will expand in transit.

20 / 30

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

A) slightly below the posted speed.

B) at the posted speed.

C) slightly above the posted speed.

D) well below the posted speed.

21 / 30

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

A) Turning

B) Starting

C) Accelerating

D) Stopping

22 / 30

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

A) more top-heavy.

B) wider

C) safer

D) heavier

23 / 30

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

A) surge from side to side.

B) splash up and down.

C) surge backward and forward.

D) stop moving suddenly.

24 / 30

What is surge?

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

B) None of the above

C) Movement of liquid in a partially filled tanker.

D) The amount a liquid expands when heated.

25 / 30

A tank vehicle is a vehicle used to transport

A) military equipment.

B) any liquid or liquefied gaseous material.

C) gasoline or other petroleum products.

D) hazardous liquids.

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 the wave was moving.

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

27 / 30

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

A) Stopping suddenly

B) Going up a steep hill

C) Leaving the highway via a curved off-ramp

D) Changing lanes on a highway

28 / 30

Tankers carrying liquids can ______ more easily than other vehicles.

A) turn

B) oll over

C) ascend a hill

D) stop

29 / 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 B can carry more liquid than Tank A.

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

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

30 / 30

An unbaffled tank is also called a

A) liquid tank.

B) conventional tank.

C) smoothbore tank.

D) low-profile tank.

Your score is

The average score is 80%

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