Exam 50: Brake Systems

In a master cylinder, the ____________________ (forward port)has been called a compensating port.

A technician is diagnosing a car that had both front brake hoses replaced 5,000 miles ago. An inspection reveals that the right front brake hose has ruptured. Technician A says the specifications called for DOT 3 fluid; using DOT 4 fluid caused the failure. Technician B says the brake hose was twisted and stressed too much when installed. Who is correct?

After replacing a vacuum booster, the brakes lock up on a road test. Technician A says there is air trapped inside the brake lines. Technician B says the power booster pushrod needs adjustment. 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?

Compare brake system flushing to bleeding.

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

While discussing brake fluids, Technician A says hygroscopic brake fluid absorbs moisture from the air. Technician B says DOT 3 brake fluid has a higher boiling point than DOT 4 fluid. Who is correct?

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

What is the coefficient of friction (COF)?

Describe the two methods of bleeding brakes.

Why must brake fluid be moisture free?

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

If a master cylinder with a 1-inch bore is replaced with a cylinder with a 3/4-inch bore, the pressure in the brake lines will be higher when the same amount of brake pedal pressure is applied to each cylinder .

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

The function of the nitrogen-charged pneumatic accumulator on a hydraulic brake booster is to _____.

Before servicing a hydraulic power booster system, you must ______.

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?

In a diagonal split brake system, how would the vehicle brake in the event of a failure?

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?

Explain why bleeding air out of a hydraulic system is important.