Brake Fundamentals Flashcards
Which of these would most likely happen if the measurements for disc/drums are undersized?
a. Noisy brake operation
b. Brake grab or pull
c. Pulsating brake pedal
d. Low brake pedal
c. Pulsating brake pedal
The brake pedal on a vehicle with power assisted disc/drum brakes moves slowly to the floor during braking. Which of these could be the cause?
a. A leaking master cylinder primary cup
b. A leaking power brake booster
c. A leaking master cylinder residual check valve
d. An internal leak in the combination valve
a. A leaking master cylinder primary cup
On a vehicle with disc/drum brakes, the front brakes grab quickly when light pedal pressure is applied. This could be caused by a bad:
a. Proportioning valve
b. Pressure differential valve
c. Metering valve
d. Residual check valve
c. Metering valve
On a vehicle with single piston floating caliper disc brakes, the disc brake pad between the caliper piston and the rotor is badly worn. The other brake pad is only slightly worn.
Tech A says that too much rotor runout could be the cause.
Tech B says that a frozen caliper piston could be the cause.
Who is correct?
a. A only
b. B only
c. Both A and B
d. Neither A nor B
d. Neither A nor B
When the brakes are applied, a vibration comes from the front of a vehicle with a disc/drum system. Which of these could be the cause?
a. Unequal tire pressure
b. Binding caliper slides
c. Excessive rotor run out
d. A frozen caliper piston
c. Excessive rotor run out
The brakes on a vehicle with a disc/drum brake system are being bled with a pressure bleeder. The tech cannot get any fluid to come out of the disc brake caliper bleeder screws. Which of these is the most likely cause?
a. A bad proportioning valve
b. A bad pressure differential valve
c. Proportioning valve release button not activated
d. Metering valve release button not activated
d. A metering valve release button not activated
