freeasestudyguides Brakes 6-10

After a test drive, one brake rotor is much hotter than the others. Which of the following is MOST likely causing this condition?

• A frozen brake caliper.

• Aerated brake fluid.

• Frozen slide pins.

• A sticking caliper piston seal.

Answer explanation

A sticking caliper piston seal prevents the caliper from fully releasing, causing excessive friction and heat on that rotor. This is the most likely cause of one rotor being much hotter than the others.

One of the brake shoes on the rear drum brakes has worn more than the other. Which of the following is causing this condition?

• Weak brake springs.

• A leaking wheel cylinder.

• A sticking wheel cylinder.

• Overadjusted brake shoes.

Answer explanation

A sticking wheel cylinder can cause uneven wear on brake shoes by preventing one shoe from fully engaging, leading to more wear on the other shoe. This is the most likely cause of the condition described.

The rear drum brakes of a light truck are locking up with only light pressure applied to the brake pedal. Which of the following is causing this condition?

• A faulty metering valve.

• The pressure differential switch.

• A faulty brake switch.

• A faulty proportioning valve.

Answer explanation

A faulty proportioning valve can cause the rear drum brakes to lock up with light pedal pressure by not properly distributing brake fluid pressure, leading to excessive force on the rear brakes.

What issue can a faulty brake switch cause?

• ESP warning light activation.

• Brake lockup.

• Uneven pad wear.

• Brake light failure.

Answer explanation

A faulty brake switch can prevent the brake lights from functioning properly, leading to brake light failure. This is crucial for safety, as other drivers may not be aware when you are braking.

What can cause a vehicle to pull to one side during braking?

• A faulty metering valve.

• A leaking wheel cylinder.

• A faulty brake switch.

• A frozen brake caliper.

Answer explanation

A frozen brake caliper can cause uneven braking force, leading the vehicle to pull to one side. This occurs because the caliper does not release properly, causing one wheel to brake more than the other.

What is the purpose of a brake proportioning valve?

• To perform a system check on the ABS.

• To warn of a hydraulic leak.

• To lock the rear brakes with light pedal pressure.

• To delay fluid pressure to the front calipers.

Answer explanation

The brake proportioning valve helps to lock the rear brakes with light pedal pressure, ensuring better control and stability during braking, especially in vehicles with rear drum brakes.