Exam 50: Brake Systems

Always keep master cylinder covers tightly sealed to prevent air, dirt, or ____________________ from contaminating the fluid.

A proportioning valve reduces fluid pressure to ______.

A brake line must be single-flared to provide a good seal at a joint or junction block.

Technician A says when the Brake warning light is illuminated, there is a difference in pressure between the two brake hydraulic circuits. Technician B says the Brake warning light is illuminated when the fluid level in the master cylinder reservoir is low. Who is correct?

Vehicles built since 1976 have a center high-mounted stop lamp (CHMSL).

Which of the following is NOT used as a friction material in NAO brake pads?

The purpose of the master cylinder is to ______.

Organic friction material _____ semimetallic materials.

Semimetallic brake linings are being discussed. Technician A says they are more efficient than organic linings at low temperatures. Technician B says they are more fade resistant than organic materials but require higher brake pedal effort. Who is correct?

Brake fluid is stored above the master cylinder in the ____________________.

The purpose of a pressure differential valve is being discussed. Technician A says it alerts the driver if pressure is lost in either portion of a dual braking system. Technician B says it provides the needed pressure balance between the front and rear brakes. Who is correct?

Bleeding a hydraulic system involves removing ____________________ from the system.

What is the coefficient of friction [COF]?

____________________ rotors consist of two machined braking surfaces separated by a finned center section for improved cooling.

What color is clean brake fluid?

Identify three electrical switches found in modern brake systems.

What moves wheel cylinder pistons and caliper pistons to their relaxed (rest) position when the brake pedal is released?

The friction that is generated between the brake pads and rotors when the vehicle is descending a steep hill is called ______.

Describe the two methods of bleeding brakes.

Dissipation of heat from the brake components is necessary to prevent brake ______.