ASE br. Practice. 3/2

The brake pedal feels soft after the master cylinder has been replaced.

Technician A says that a leaking power booster could be the cause.

Technician B says that air in the hydraulic system could be the cause.

Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

A vehicle's brake pedal goes to the floor.

Technician A says that an internal master cylinder leak could be the cause.

Technician B says that seized wheel cylinder pistons could be the cause.

Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

A vehicle pulls to the left during braking and pulls right without braking. This could be caused by:

• unequal tire pressure.

• a failed master cylinder.

• a collapsed right front brake hose.

• a seized left front caliper.

The front of the vehicle dips noticeably during braking on a vehicle with disc/drum brakes. Which of these could be the cause?

• Stuck-open proportioning valve

• Stuck-open metering valve

• Collapsed front brake hose

• Seized caliper pistons

Technician A says that the bleeder valve on the caliper should be opened when collapsing a caliper piston.

Technician B says that the brake hose should be clamped when collapsing a caliper piston.

Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Technician A says that DOT 5 brake fluid can be substituted where DOT 3 brake fluid is specified.Technician B says that a scan tool may be required to bleed the brakes on some vehicles.Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

A vehicle has a low brake pedal. Which of these could be the cause?

• A stuck-open metering valve

• A stuck-open proportioning valve

• A seized caliper piston

• A seized star adjuster

A vehicle has pulsating brakes. Technician A says that a brake rotor with excessive lateral run-out could be the cause.Technician B says that corrosion on the hub flange could be the cause.Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

A vehicle has a pull to the right when braking. Which of these could be the cause?

• A seized left front caliper

• A seized right front caliper

• A leaking brake booster

• A warped brake rotor

Technician A says that wheel bearing grease should be used to lubricate backing plate contact points.Technician B says that wheel bearing grease should be used to lubricate brake caliper slides and pins.Who is right?

• A only

• B only

• Both A and B

• Neither A nor B