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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129

CDL Tanker Test

1 / 30

A tank vehicle is a vehicle used to transport

A) military equipment.

B) gasoline or other petroleum products.

C) hazardous liquids.

D) any liquid or liquefied gaseous material.

2 / 30

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

A) 100 gallons

B) 100 pounds

C) 1,000 pounds

D) 1,000 gallons

3 / 30

Which of the following is a true statement?

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

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

C) None of the above

D) Tank A is safer than Tank B.

4 / 30

Why do baffles make handling a liquid tank vehicle easier?

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

B) They lower the center of gravity.

C) They help control forward and backward surge.

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

5 / 30

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

A) wider

B) more top-heavy.

C) heavier

D) safer

6 / 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

7 / 30

What is surge?

A) Movement of liquid in a partially filled tanker.

B) The amount a liquid expands when heated.

C) None of the above

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

8 / 30

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

A) Compartments 3, 4, and 5

B) Compartments 2, 3, and 4

C) Compartments 1, 3, and 5

D) Compartments 1, 2, and 3

9 / 30

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

A) Stopping

B) Accelerating

C) Starting

D) Turning

10 / 30

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

A) Tank C

B) Tank A

C) All of the above

D) Tank B

11 / 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 weight of the liquid.

C) The distance you will be traveling.

D) Whether the tanker is baffled or unbaffled.

12 / 30

Tankers carrying liquids can ______ more easily than other vehicles.

A) oll over

B) turn

C) ascend a hill

D) stop

13 / 30

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

A) Milk

B) Dry cement

C) Gasoline

D) Liquid nitrogen

14 / 30

Forward and backward surge is especially strong when a tanker is

A) going up a hill.

B) unbaffled.

C) turning a corner.

D) baffled

15 / 30

What device divides a liquid tank into several smaller tanks?

A) None of the above

B) A baffle

C) A smooth bore

D) A bulkhead

16 / 30

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

A) Backward

B) To the right

C) Forward

D) To the left

17 / 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) weight of the vehicle.

D) length of the vehicle.

18 / 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 the last compartment highest.

C) Fill each compartment as full as possible.

D) Distribute the weight evenly.

19 / 30

Tests have shown that tankers can turn over

A) while being loaded.

B) when taking a curve at the posted speed.

C) when taking a curve above the posted speed.

D) while driving on icy roads.

20 / 30

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

A) Taking highway curves.

B) Coming to a stop.

C) Going uphill.

D) Driving on wet roads.

21 / 30

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

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

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

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

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

22 / 30

The amount of liquid you can legally carry does

A) the amount the liquid will expand in transit.

B) the distance to be traveled.

C) the liquid’s weight.

D) legal weight limits.

23 / 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) rollover.

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

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

D) None of the above

24 / 30

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

A) Changing lanes on a highway

B) Going up a steep hill

C) Stopping suddenly

D) Leaving the highway via a curved off-ramp

25 / 30

An unbaffled tank is also called a

A) smoothbore tank.

B) low-profile tank.

C) liquid tank.

D) conventional tank.

26 / 30

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

A) Gasoline

B) Acid

C) Liquid propane

D) Orange juice

27 / 30

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

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

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

C) None of the above

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

28 / 30

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

A) surge backward and forward.

B) surge from side to side.

C) splash up and down.

D) stop moving suddenly.

29 / 30

Tank B is called a

A) low-profile tank.

B) low-capacity tank.

C) conventional tank.

D) round-bodied tank.

30 / 30

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

A) at the posted speed.

B) slightly below the posted speed.

C) slightly above the posted speed.

D) well below the posted speed.

Your score is

The average score is 78%

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