ASE STYLE BRAKE ASSESSMENT 1

1. On a car with disc/Drum brakes, the front brakes grab quickly when light brake pedal pressure is applied. This problem could be caused by:

• A. Proportioning valve
• B. Pressure safety switch
• c. Metering Valve
• d. Residual check valve

2. The driver of a car with power disc/drum brakes says that the brake pedal moves slowly while maintaining pedal pressure at a stoplight. What could be the cause?

• A. A leaking primary piston cup in the master cylinder
• B. Leaking power brake booster
• C.Leaking residual check valve in the master cylinder
• D. Internal leak in the Combination valve

3. What is the purpose of the Master cylinder residual check valve(s) on vehicles equipped with drum brakes?

• A. Allows the driver to pump up the brakes
• B. Prevents air from entering the hydraulic system
• c Prevents wheel lockup by reducing hydraulic pressure
• d. Reduces pedal pulsation by controlling hydraulic pressure
• D. Internal leak in the Combination valve

4. A technician has just overhauled the front brakes on a vehicle with disc front and rear drum brakes. However when he attaches a pressure bleeder (pressurizing to about 25 psi) to the master cylinder, he can not get any fluid to come out of the disc brake bleeder screws. Which of the following is the MOST LIKELY the cause.

• A. Bad Proportioning valve
• B. Bad pressure differential valve
• C. Proportioning valve release button not activated.
• D. Metering valve release button not activated
• Option 5

5. On a vehicle with a single piston floating caliper front disc brakes, the brake pads on the left side of the vehicle are almost completely worn while the right side is almost new. Technician A says that too much rotor runout could be the cause. Technician B says that a binding caliper piston could be the cause. Who is right?

• A. technician A only
• B. Technician B
• C. Both A and B
• D. Neither A or b
• Option 5

6. A hydraulic brake line is leaking. Which of these is the correct repair?

• A. Cut out the bad section and replace it with a new steel line using compression fittings
• B Replace the leaking line with double-flared , seamless copper tubing.
• C. Cut out the bad section and replace it with single-flared steel tubing using flare nuts and unions.
• D. Replaced the leaking line with double flared steel tubing

7. Which of the following problems could be caused by using a residual check valve in a disc brake master cylinder?

• A. reduced brake pedal travel
• B. Reduced brake system pressure
• C. Increased brake pad wear
• D. Increased Rotor runout

8. A customer complains that their vehicle pulls to the right when the brakes are applied. Technician a says that a restricted brake line to the left caliper can cause the problem. Technician B says a Malfunctioning valve is probably the cause. Who is right?

• A. Technician a only
• B. Technician B only
• C. Both A and B
• D. Neither A or B

9. With foot pressure applied, the brake pedal on a vehicle with vacuum assisted power brakes moves down slightly when the engine is started. Technician A says the condition could be caused by a leaking power brake booster diaphragm. Technician B says the cause could be caused by faulty power brake booster check valve. Who is right/

• A. Technician a only
• B. Technician B only
• C. Both A and B
• D. Neither A or B

10. The hydraulic system on a vehicle with integral ABS is to be bled. Technician A says that the front brakes can be bled in the conventional manner. Technician B says that both front and rear brakes can only be bled using pressure from a fully charged accumulator. Who is right?

• A. Technician a only
• B. Technician B only
• C. Both A and B
• D. Neither A or B