Automotive Service
Excellence (ASE) -
Brake System(48
questions and
answers)
The brake pedal on a vehicle with power-assisted
disc/drum brakes moves
slowly to the floor during braking. Which could be
the cause? - answer 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: - answer 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.
,Technician A says that too much rotor runout could
be the cause.
Technician B says that a frozen caliper piston could
be the cause.
Who is right? - answer Neither A nor B
When the brakes are applied, a vibration comes
from the front of a vehicle with
a disc/drum system. Which could be the cause -
answer Excessive Rotor Runout
A front disc brake rotor is slightly below minimum
thickness specification after
machining. The technician should: - answer
Replace The Rotor
A hydraulic brake line is leaking. Which is the
correct repair? - answer Replace the leaking line
double flared steel tubing
The drag on a vehicle's drum brakes increases
after each application until
they lockup. Bleeding the system restores normal
operation for a short time;
then drag increases until the brakes lockup again.
Which could be the
, cause? - answer A Blocked Compensating Port
With the brakes applied, the pedal moves down
slightly when the engine is
started on a vehicle with power brakes.
Technician A says that the cause could be a leaking
power brake booster
diaphragm.
Technician B says that the cause could be a stuck
closed check valve on the
power brake booster manifold.
Who is right? - answer Neither A nor B
What are the major components of the brake
system? - answer disc brakes
brake pads
calipers
rotors
drum brakes
drums
shoes
drum hardware
wheel cylinders
master cylinder
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