Start Quiz: Jazzycazz cdl quiz - air brakes endorsement

Question: When does the anti-lock braking system help keep control of your vehicle?

Choices:

A. During turns.

B. During gear changes

During hard braking.

D. During acceleration.

Question: What is the proper way to test the service brake?

Choices:

Accelerate to 5 mph, firmly apply service brake, and feel for pulling.

B. Accelerate to 5 mph, gently apply service brake, and feel for pulling.

C. Release parking brake, firmly apply service brake, and feel for pulling.

D. Engage parking brake, gently apply service brake, and feel for pulling.

Question: What is the proper way to check the low air pressure warning signal?

Choices:

Shut the engine off, turn the electrical power on, and pump the brake pedal.

B. Let the engine run, and pump the brake pedal.

C. Shut the engine off, leave the electrical power off, and pump the brake pedal.

D. Chock the wheels, turn the engine off, and pump the brake pedal.

Question: What must be done first in order to check the free play of the slack adjusters on s-cam brakes?

Choices:

Park on level ground, chock the wheels, and release the parking brake.

B. Park on level ground, engage the parking brake, and pump the service brake.

C. Park on level ground, chock the wheels, and pump the service brake.

D. Park on level ground, pump the service brake, and turn the truck off.

Question: What are truck tractors with air brakes built after March 1, 1997 and all other air brake vehicles built after March 1, 1998 required to have?

Choices:

A. ABS.

B. Emergency brakes.

C. Dual parking control valves.

D. Modulating control valves.

Question: Slack adjusters are out of adjustment if:

Choices:

There is more than 1 inch of free play.

B. There is more than 1/4 inch of free play.

C. There is more than 3/4 inch of free play.

D. There is more than 1/2 inch of free play.

Question: What should you do if one system is low on air pressure on a dual air brake system vehicle?

Choices:

Stop the vehicle and have the system fixed.

B. As long as one system is functional keep going.

C. Drive directly to your mechanic.

D. Have it fixed at the end of the day.

Question: The air loss rate for a combination vehicle should be less than:

Choices:

A. 2 psi in 1 minute.

3 psi in 1 minute.

C. 4 psi in 1 minute.

D. 5 psi in 1 minute.

Question: What is the proper way to test the parking brake?

Choices:

Stop, engage the parking brake, and accelerate slowly.

B. Accelerate to 10 mph, and engage the parking brake.

C. Accelerate to 15 mph, and engage the parking brake.

D. Chock the wheels, engage the parking brake, and accelerate slowly.

Question: The air loss rate for a single vehicle should be less than:

Choices:

2 psi in 1 minute.

3 psi in 1 minute.

C. 4 psi in 1 minute.

D. 5 psi in 1 minute.

Question: Foundation brakes are located at every wheel.

Choices:

True

B. False