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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128

CDL Tanker Test

1 / 30

An unbaffled tank is also called a

A) liquid tank.

B) smoothbore tank.

C) low-profile tank.

D) conventional tank.

2 / 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) be pushed in the direction opposite the direction the wave was moving.

B) None of the above

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

D) rollover.

3 / 30

Tank B is called a

A) conventional tank.

B) low-profile tank.

C) round-bodied tank.

D) low-capacity tank.

4 / 30

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

A) Liquid nitrogen

B) Gasoline

C) Dry cement

D) Milk

5 / 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 B can carry more liquid than Tank A.

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

6 / 30

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

A) Gasoline

B) Orange juice

C) Acid

D) Liquid propane

7 / 30

What is surge?

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

B) None of the above

C) The amount a liquid expands when heated.

D) Movement of liquid in a partially filled tanker.

8 / 30

The amount of liquid you can legally carry does

A) the liquid’s weight.

B) legal weight limits.

C) the amount the liquid will expand in transit.

D) the distance to be traveled.

9 / 30

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

A) Accelerating

B) Starting

C) Turning

D) Stopping

10 / 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) Whether the tanker is baffled or unbaffled.

C) The speed you will be traveling.

D) The distance you will be traveling.

11 / 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 left

D) To the right

12 / 30

What is outage?

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

B) The horsepower required to haul a liquid tanker

C) Liquid that is leaking from a liquid tanker

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

13 / 30

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

A) Distribute the weight evenly.

B) Fill the first compartment highest.

C) Fill the last compartment highest.

D) Fill each compartment as full as possible.

14 / 30

A tank vehicle is a vehicle used to transport

A) any liquid or liquefied gaseous material.

B) hazardous liquids.

C) military equipment.

D) gasoline or other petroleum products.

15 / 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

16 / 30

Why do baffles make handling a liquid tank vehicle easier?

A) They lower the center of gravity.

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

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

D) They help control forward and backward surge.

17 / 30

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

A) Going uphill.

B) Coming to a stop.

C) Driving on wet roads.

D) Taking highway curves.

18 / 30

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

A) more top-heavy.

B) wider

C) heavier

D) safer

19 / 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.

20 / 30

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

A) length of the vehicle.

B) loaded tanker’s low center of gravity.

C) movement of liquid in the tank.

D) weight of the vehicle.

21 / 30

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

A) 100 gallons

B) 1,000 pounds

C) 100 pounds

D) 1,000 gallons

22 / 30

What device divides a liquid tank into several smaller tanks?

A) A smooth bore

B) A bulkhead

C) A baffle

D) None of the above

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) stop moving suddenly.

D) surge backward and forward.

24 / 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.

25 / 30

Forward and backward surge is especially strong when a tanker is

A) going up a hill.

B) turning a corner.

C) unbaffled.

D) baffled

26 / 30

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

A) well below the posted speed.

B) at the posted speed.

C) slightly above the posted speed.

D) slightly below the posted speed.

27 / 30

Which of the following is a true statement?

A) Tank A is safer than Tank B.

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

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

D) None of the above

28 / 30

Tankers carrying liquids can ______ more easily than other vehicles.

A) oll over

B) stop

C) ascend a hill

D) turn

29 / 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

30 / 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 2, 3, and 4

C) Compartments 3, 4, and 5

D) Compartments 1, 3, and 5

Your score is

The average score is 78%

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