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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127

CDL Tanker Test

1 / 30

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

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

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

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

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

2 / 30

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

A) Tank B

B) Tank A

C) All of the above

D) Tank C

3 / 30

Tests have shown that tankers can turn over

A) while being loaded.

B) when taking a curve above the posted speed.

C) when taking a curve at the posted speed.

D) while driving on icy roads.

4 / 30

Why do baffles make handling a liquid tank vehicle easier?

A) They help control side-to-side 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 forward and backward surge.

5 / 30

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

A) at the posted speed.

B) slightly above the posted speed.

C) slightly below the posted speed.

D) well below the posted speed.

6 / 30

Tankers carrying liquids can ______ more easily than other vehicles.

A) ascend a hill

B) oll over

C) stop

D) turn

7 / 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) Whether the tanker is baffled or unbaffled.

B) The distance you will be traveling.

C) The speed you will be traveling.

D) The weight of the liquid.

8 / 30

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

A) Turning

B) Accelerating

C) Stopping

D) Starting

9 / 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 3, 4, and 5

D) Compartments 1, 2, and 3

10 / 30

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

A) Fill the first compartment highest.

B) Distribute the weight evenly.

C) Fill each compartment as full as possible.

D) Fill the last compartment highest.

11 / 30

What is outage?

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

B) The horsepower required to haul a liquid tanker

C) Liquid that is leaking from a liquid tanker

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

12 / 30

What device divides a liquid tank into several smaller tanks?

A) A bulkhead

B) A smooth bore

C) A baffle

D) None of the above

13 / 30

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

A) movement of liquid in the tank.

B) length of the vehicle.

C) weight of the vehicle.

D) loaded tanker’s low center of gravity.

14 / 30

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

A) Going uphill.

B) Driving on wet roads.

C) Taking highway curves.

D) Coming to a stop.

15 / 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 the wave was moving.

B) None of the above

C) rollover.

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

16 / 30

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

A) Gasoline

B) Dry cement

C) Liquid nitrogen

D) Milk

17 / 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

18 / 30

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

A) To the left

B) Forward

C) Backward

D) To the right

19 / 30

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

A) more top-heavy.

B) safer

C) heavier

D) wider

20 / 30

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

A) 100 gallons

B) 1,000 gallons

C) 100 pounds

D) 1,000 pounds

21 / 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

22 / 30

An unbaffled tank is also called a

A) conventional tank.

B) low-profile tank.

C) smoothbore tank.

D) liquid tank.

23 / 30

Tank B is called a

A) round-bodied tank.

B) conventional tank.

C) low-capacity tank.

D) low-profile tank.

24 / 30

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

A) Gasoline

B) Acid

C) Liquid propane

D) Orange juice

25 / 30

What is surge?

A) Movement of liquid in a partially filled tanker.

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

C) The amount a liquid expands when heated.

D) None of the above

26 / 30

The amount of liquid you can legally carry does

A) the distance to be traveled.

B) the liquid’s weight.

C) the amount the liquid will expand in transit.

D) legal weight limits.

27 / 30

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

A) stop moving suddenly.

B) splash up and down.

C) surge backward and forward.

D) surge from side to side.

28 / 30

Which of the following is a true statement?

A) None of the above

B) Tank A is safer than Tank B.

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

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

29 / 30

A tank vehicle is a vehicle used to transport

A) any liquid or liquefied gaseous material.

B) military equipment.

C) gasoline or other petroleum products.

D) hazardous liquids.

30 / 30

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

A) Leaving the highway via a curved off-ramp

B) Going up a steep hill

C) Stopping suddenly

D) Changing lanes on a highway

Your score is

The average score is 78%

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