ASE questions - Brake System

The brake pedal on a vehicle with power-assisted disc/drum brakes moves slowly to the floor during braking. Which could be the cause? - Answer- A Leaking Master Cylinder Primary Cup On a vehicle with disc/drum brakes, the front brakes grab quickly when light pedal pressure is applied. This could be caused by a bad: - Answer- Metering Valve On a vehicle with single piston, floating caliper disc brakes, the disc brake pad between the caliper piston and the rotor is badly worn. The other brake pad is only slightly worn. Technician A says that too much rotor runout could be the cause. Technician B says that a frozen caliper piston could be the cause. Who is right? - Answer- Neither A nor B When the brakes are applied, a vibration comes from the front of a vehicle with a disc/drum system. Which could be the cause - Answer- Excessive Rotor Runout A front disc brake rotor is slightly below minimum thickness specification after machining. The technician should: - Answer- Replace The Rotor A hydraulic brake line is leaking. Which is the correct repair? - Answer- Replace the leaking line double flared steel tubing The drag on a vehicle's drum brakes increases after each application until they lockup. Bleeding the system restores normal operation for a short time; then drag increases until the brakes lockup again. Which could be the cause? - Answer- A Blocked Compensating Port With the brakes applied, the pedal moves down slightly when the engine is started on a vehicle with power brakes. Technician A says that the cause could be a leaking power brake booster diaphragm. Technician B says that the cause could be a stuck closed check valve on the power brake booster manifold. Who is right? - Answer- Neither A nor B What are the major components of the brake system? - Answer- disc brakes brake pads calipers rotors drum brakes drums shoes dr