Parking Brake Checks - ONLINE CDL SCHOOL

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Parking Brake Checks

Build confidence with 10 original questions about Parking Brake Checks. 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

What is the correct action if your vehicle’s air tanks do not have automatic drains?

Wait until the next scheduled maintenance.

Drain the air tanks at the end of each working day.

Only drain the tanks if the low air pressure warning comes on.

Drain the tanks only in cold weather.

2 / 10

Why should you avoid pressing the brake pedal when the spring brakes are applied during a parking brake check?

It may cause the parking brake knob to pop out.

It can damage the brakes due to combined spring and air pressure.

It will drain the battery quickly.

It will cause the air compressor to overheat.

3 / 10

When testing the parking brake, what is a sign that the brakes are working properly?

The engine stalls immediately.

The vehicle does not move when the parking brake is applied and you try to move forward gently.

The low air pressure warning light turns on.

The air pressure gauge drops rapidly.

4 / 10

What is the main risk of using the parking brakes when the brakes are very hot after coming down a steep grade?

The air pressure will increase too quickly.

The parking brake knob may stick.

The brake lights will not function.

The brakes can be damaged by the heat.

5 / 10

If the parking brakes do not hold the vehicle when tested, what should you do?

Do not drive until the parking brake system is repaired.

Increase engine RPM and try again.

Pump the brake pedal several times.

Release and reapply the parking brake quickly.

6 / 10

What should you do if the low air pressure warning signal does not activate before air pressure drops below 55 psi during a parking brake check?

Release the parking brake and re-test the warning system.

Do not drive the vehicle until the warning system is repaired.

Continue driving and monitor the pressure gauge closely.

Increase engine speed to build air pressure faster.

7 / 10

What should you do if the brakes are very wet in freezing temperatures before setting the parking brake?

Use wheel chocks and let the brakes dry before applying the parking brake.

Apply the parking brake immediately.

Increase engine speed to warm the brakes.

Release air from the tanks to remove moisture.

8 / 10

When performing a parking brake check, what is the correct way to apply the parking brakes on newer vehicles with air brakes?

Push in the red, round control knob.

Pull out the yellow, diamond-shaped control knob.

Step firmly on the brake pedal.

Turn the ignition key to the off position.

9 / 10

Why is it important to never leave your vehicle unattended without applying the parking brakes or chocking the wheels?

The engine may not restart.

The air compressor could overheat.

The vehicle might roll away and cause injury or damage.

The brake lights may stay on.

10 / 10

When testing the parking brake, which control is typically used to apply it in older vehicles with air brakes?

A lever that swings from side to side or up and down.

A blue, diamond-shaped knob.

A red, round push-pull knob.

The accelerator pedal.

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About the Parking Brake Checks practice quiz

This practice quiz focuses on Parking Brake Checks, listed under CDL Practice — Air Brakes. 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.