Exam 52: Disc Brakes

Technician A says floating calipers must be removed from the steering knuckle when replacing brake pads. Technician B says fixed calipers must be removed from the steering knuckle when replacing pads. Who is correct?

Which of the following is NOT part of a caliper assembly?

Some caliper assemblies can contain up to ____________________ cylinder bores and pistons.

Technician A says if the plated surface of a steel piston is worn, pitted, scored, or corroded, it can be lightly filed with a mill file then polished with emery cloth. Technician B says if there are any cracks, chips, or gouges in a phenolic piston, it must be replaced. Who is correct?

When hydraulic pressure is diminished, the caliper piston seal functions as a return spring to retract the piston.

A vehicle has a frozen caliper on the left front wheel. The right front caliper is in good condition. Technician A installs a set of four new pads and a remanufactured caliper on the left side. Technician B installs loaded calipers on the left and right side. Who is correct?

Audible pad wear sensors have electrical contacts embedded in the linings. These contacts trigger the chime module when the pads wear down.

Rear disc brakes with auxiliary drum parking brakes automatically adjust when the ______.

The customer complains of a high-pitched squeal whenever the wheels are turning, except when the brakes are applied. Technician A says the pads are worn and need replacement. Technician B says the rotors are scored and must be replaced. Who is correct?

Brake ____________________ are metal plates that have linings riveted or bonded to them.

The splash shield and wheel direct air over the rotor to aid in cooling.

A dust boot seal automatically adjusts caliper piston position.

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

Improper tightening of the wheel lug nuts could cause the rotor to ____________________.

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

Name four major advantages of disc brakes as compared to drum brakes.

Technician A says unidirectional rotors can be installed on either the left side or right side of the car. Technician B says unidirectional rotors run cooler than conventional ventilated rotors. Who is correct?

What prevents moisture from entering the cylinder bore?

Identify four disc brake rotor problems.

Composite rotors are made of cast iron and ______.