Exam 52: Disc Brakes

Air in the disc brake hydraulic system will cause a ____________________ pedal.

What are loaded calipers?

A rear disc/drum parking brake uses the inside of each rear wheel hub and rotor assembly as a parking brake drum.

Technician A uses a C-clamp to push the piston back into its bore when replacing pads. Technician B supports the caliper using safety wire while servicing the brakes. Who is correct?

Unidirectional rotors have ____________________ cooling fins.

Technician A replaces the pads if the linings are less than 1/8 inch (3.175 mm). Technician B says if the pad on one side of the caliper is worn more than the other side, the rotor has excess runout and must be replaced. Who is correct?

Why should mineral-based cleaning solvents be avoided when overhauling a caliper assembly?

A hard pedal [abnormally high amount of pedal pressure is required to stop the vehicle] normally indicates a problem with the ______.

A typical fixed caliper housing is designed with one caliper piston.

Brake rotors should be checked for _____.

Rear disc parking brakes have a mechanism that forces the pads against the rotor hydraulically.

Brake calipers are being discussed. Technician A says the bleeder screw is located at the bottom of the cylinder bore. Technician B says the fluid inlet hole is located at the top of the cylinder bore. Who is correct?

A vibration or pulsation in the brake pedal when the brakes are applied is usually caused by ______.

Technician A uses a dial indicator to measure parallelism. Technician B uses a dial indicator to measure runout. Who is correct?

A brake inspection reveals that the outboard pad is significantly thinner than the inboard pad. Technician A says the problem could be a defective dust boot that caused the caliper to seize. Technician B says the problem could be caused by poor lubrication or deformation of the machined sliding areas on the caliper and/or anchor plate. Who is correct?

Name the three types of calipers used with disc brakes.

Technician A cleans brake components in denatured alcohol. Technician B cleans brake components in clean brake fluid. Who is correct?

____________________ caliper disc brakes do not move when the brakes are applied.

The ball-and-ramp-type parking brake actuator is found on what make of vehicles?

During pad replacement, some caliper pistons must be rotated with a special tool to retract all the way into the caliper bore.