Tires and Wheels - ONLINE CDL SCHOOL

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Tires and Wheels

Build confidence with 10 original questions about Tires and Wheels. 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

You are checking the tread depth on your steering axle tires. What is the minimum legal tread depth required?

6/32 inch

1/32 inch

2/32 inch

4/32 inch

2 / 10

During your inspection, you see rust around several wheel nuts. What should you do next?

Check the tightness of the nuts immediately

Ignore it if the wheel feels secure

Clean the rust and continue driving

Apply lubricant to the nuts

3 / 10

While inspecting your wheels, you notice a rim with a welding repair. What should you do?

Paint over the weld to prevent rust

Continue using the rim if the weld looks strong

Tighten the wheel nuts and proceed

Replace the rim before using the vehicle

4 / 10

While checking your wheels, you find a missing lug nut. What is the safest action?

Replace the missing lug nut before driving

Tighten the remaining nuts and proceed

Drive only at low speeds

Continue driving and check at your next stop

5 / 10

You find that one of your rear tires has only 1/32 inch of tread depth. What is the correct action?

Continue driving and check again later

Replace the tire before operating the vehicle

Move the tire to the front axle

Inflate the tire to maximum pressure

6 / 10

You are inspecting a bus and notice that the front tires are retreaded. What is the correct response?

Increase tire pressure to compensate

Reduce speed and continue driving

Move the retreaded tires to the rear axle

Replace the front tires with new or original tread tires

7 / 10

During your pre-trip inspection, you see that the wheel bearing seal is leaking. What should you do?

Add more lubricant and drive slowly

Ignore the leak if it is minor

Wipe off the leak and continue your trip

Have the seal repaired before driving the vehicle

8 / 10

While inspecting dual tires on your truck, you find that the tires are touching each other. What is the correct action?

Switch the positions of the tires

Deflate one tire slightly to create space

Drive carefully and check again at your next stop

Have the tires adjusted so they do not touch before driving

9 / 10

During your pre-trip inspection, you notice that the valve stem on a tire is cracked. What should you do?

Replace or repair the valve stem before operating the vehicle

Ignore it if the tire is still holding air

Add more air to the tire to compensate

Tighten the valve cap and continue driving

10 / 10

During your pre-trip, you notice that two tires on the same axle are different sizes. What should you do?

Do not drive until the tires are matched in size

Inflate the smaller tire to match the larger one

Switch the tires to another axle

Drive slowly to the nearest service station

Your score is

The average score is 0%

About the Tires and Wheels practice quiz

This practice quiz focuses on Tires and Wheels, listed under CDL Practice — Pre-Trip Inspection. 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.