Exam 50: Brake Systems

Identify the two basic types of power-assist unit designs.

What is brake fade?

Brake fluid must be able to flow freely at 500 degrees Fahrenheit (260 degrees Celsius) and at -104 degrees Fahrenheit (-76 degrees Celsius).

A vehicle waiting at a stop light with the brakes applied is held in place by _____ friction.

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

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

The two inlet ports in a master cylinder are the vent port and the ___________________ port.

While discussing quick take-up master cylinders, Technician A says this design is used with low-drag caliper pistons. Technician B says this design is only used on disc brake systems. 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?

Which of the following is NOT a component of a typical dual master cylinder?

Which of the following fluids should be used in brake systems?

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 base on the top speed of the vehicle. Who is correct?

An metric bubble flare fitting may also be called a(n) ____________________ fitting.

Compare brake system flushing to bleeding.

Describe the functions of the hydraulic system combination valve.

A metering valve is found only on cars and trucks with ______.

The brake light [stop light] switch is located _____ on modern vehicles.

As brake fluid absorbs moisture, _____.

While manually bleeding a brake system, Technician A loosens all the brake bleeder screws at the same time. Technician B uses shop air to push the fluid and air through the lines and out the bleeder screws. Who is correct?

If a force of 150 pounds is applied to a master cylinder with a piston area of 1 square inch, how much force is developed on a wheel cylinder that has a piston area of 2 square inches?