Exam 50: Brake Systems

The ____________________ is a housing that contains the disc brake piston, seal, and boots.

You must always keep master cylinder covers tightly sealed to prevent air, dirt, or ____________________ from contaminating the fluid

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?

What does the term hygroscopic mean?

The actuator lever on the height-sensing proportioning valve is connected to the ____________________.

Technician A bleeds the brakes system manually with the help of an assistant. Technician B uses a pressure bleeder. Who is correct?

A technician is checking a car with an owner's complaint of poor braking performance and a low brake pedal. The master cylinder is full, and there are no signs of fluid leaks in the brake system. When he holds firm pressure on the brake pedal, the pedal slowly drops. What could be the problem?

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

Brake fluid serves as a lubricant for the parts of the hydraulic system and ensures smooth and even operation.

Technician A says the size of the pads, shoes, drums, and rotors is based on the weight of the vehicle. Technician B says their size is based on the top speed the vehicle can achieve. Who is correct?

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

A brake fluid lamp will illuminate on the instrument panel if the fluid is contaminated and needs to be changed.

Identify the four electrical switches found in modern brake systems.

Technician A says a metering valve delays front braking until the rear brakes are applied. Technician B says a proportioning valve controls rear brake pressure, especially during moderate stops. Who is correct?

The fluid level in the reservoir for the rear drum brakes will drop significantly as the brake shoes wear down.

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

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

What is brake fade?

The brake light (stop light)switch is located _____ on modern vehicles.

All master cylinders are made of cast iron.