CDL Knowledge: CDL Classes, Endorsements, and Restrictions

Practice free. No account needed.
Want your scores, test history, and progress in your driver dashboard? Create a free account or log in before starting to save your results.

Build confidence with 10 original questions about CDL Knowledge: CDL Classes, Endorsements, and Restrictions. Review your answers and explanations after finishing.

Supplemental study practice. This is not a government licensing exam or ELDT certification, and does not replace hands-on training. Follow your state’s current handbook.

1 / 10

A driver takes the CDL skills test in a vehicle with an automatic transmission. What restriction will be placed on their CDL?

E – No manual transmission

L – No full air brakes

O – No fifth wheel connection

Z – No full air brakes

2 / 10

Which endorsement is required for a driver who wants to haul both hazardous materials and operate a tank vehicle?

3 / 10

Which of the following vehicles requires a CDL regardless of weight if it is transporting hazardous materials that require placarding?

Only vehicles over 26,001 pounds

Any size vehicle

Only combination vehicles

Only vehicles designed for 16 or more passengers

4 / 10

A driver takes the skills test in a Class A vehicle with a pintle hook instead of a fifth wheel. What restriction is placed on their CDL?

O – No fifth wheel connection

L – No full air brakes

M – May only operate Class B and C passenger vehicles

E – No manual transmission

5 / 10

A driver is applying for their first Class B CDL. What federal training requirement must they meet before taking the skills test?

Hold a CDL permit for 30 days

Pass the skills test without any training

Complete Entry-Level Driver Training (ELDT) with a registered provider

Complete a defensive driving course

6 / 10

You want to drive a bus designed to carry 20 passengers, including the driver. What endorsement must you obtain on your CDL?

H (Hazardous Materials)

T (Double/Triple Trailers)

N (Tank Vehicle)

P (Passenger)

7 / 10

A driver holds a Class B CDL and obtains a passenger endorsement by testing in a Class C vehicle. What restriction applies?

L – No full air brakes

N – May only operate Class C passenger vehicles

M – May only operate Class B and C passenger vehicles

E – No manual transmission

8 / 10

You want to tow double trailers with a commercial vehicle. Which endorsement must you obtain?

9 / 10

A driver is applying for a hazardous materials endorsement for the first time. Which of the following is required by federal law?

A skills test in a hazardous materials vehicle

A medical exam only

A federal security threat assessment and fingerprinting

Only a written knowledge test

10 / 10

A driver plans to operate a vehicle with a gross combination weight rating (GCWR) of 28,000 pounds, towing a trailer with a GVWR of 12,000 pounds. Which CDL class is required for this vehicle combination?

No CDL required

Class B

Class A

Class C

Your score is

The average score is 0%

About the CDL Knowledge: CDL Classes, Endorsements, and Restrictions practice quiz

This practice quiz focuses on CDL Knowledge: CDL Classes, Endorsements, and Restrictions, listed under CDL Practice — CDL Knowledge. Use it to check what you understand, spot topics to revisit, and connect the material to safe, informed decisions on the road.

Before you begin

Keep your current CDL manual or course notes nearby. Read each prompt carefully and think through why an answer fits, especially when a question describes a vehicle, road, or workplace situation. Licensing rules and procedures can vary, so confirm requirements with current official materials for your state.

After you finish

Review any explanations shown with your results. Note unfamiliar terms or missed concepts, then revisit your manual or course notes before trying again. Use your score to guide study; understanding why an answer is correct matters more than the number alone.

Study note: These quizzes are independent study practice. They are not state licensing exams, official government materials, or ELDT certification, and they do not replace required training.

Explore CDL Tests to find more practice by subject.