ASE A5 EXAM LATEST 2024-2025 ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES(VERIFIED ANSWERS) |AGRADE
Terms in this set (90)
1. On a car with disc/drum 1. The correct answer is C. The metering valve delays
brakes, the front brakes the flow of brake fluid to the front calipers until the
grab pressure
quickly when light pedal in the system rises to a point where the wheel cylinder
pressure is applied. This can
problem overcome the tension of the brake shoe return springs.
could be caused by a bad: The
A. proportioning valve purpose is to have both front and rear brakes apply
B. pressure safety switch simultaneously.
C. metering valve This prevents the front brakes from locking up during
D. residual check valve light brake applications.
,2. The driver of a vehicle 2. The correct answer is A. If the primary piston cup in
with power disc/drum the master cylinder is leaking, pressure will not build up
brakes ahead
says that the brake pedal of the primary piston to increase pressure to the rear
moves slowly to the floor brakes.
while The piston will then move forward until the spring is
maintaining pedal pressure compressed
at a stoplight. What could enough to move the secondary piston. Consequently,
cause this problem? this internal leak will cause the brake pedal to slowly
A. leaking primary piston drop to
cup in master cylinder the floor.
B. leaking power brake
booster
C. leaking residual check
valve in master cylinder
D. internal leak in the
combination valve
3. Which of the following 3. The correct answer is C. Poor rotor parallelism
would MOST LIKELY (thickness
happen variation) will cause a pulsating brake pedal. This is due
if the measurements taken to the caliper piston movement that occurs as the pad
from the check shown rides
above over the alternating high and low areas on the disc. This
varied from the action
manufacturer's forces brake fluid to flow back and forth from the caliper
specifications? to
A. noisy brake operation the master cylinder, creating the pulsating pedal
B. brake grab or pull feedback.
C. pulsating brake pedal
D. low brake pedal
,4. What is the purpose of 4. The correct answer is B. Residual check valve(s) are
the master cylinder residual used on drum brakes to keep residual low pressure
check valve(s) on vehicles (slight
equipped with drum static pressure) in the brake system at all times even
brakes? when the
A. allows the driver to pump brake pedal is released. This pressure (5-20 psi) keeps
up the brakes the lips
B. prevents air from of the wheel cylinder piston cups tight against the
entering the hydraulic cylinder
system walls to prevent air from entering the system when at
C. prevents wheel lockup rest
by reducing the hydraulic (brakes released).
pressure
D. reduces pedal pulsation
by controlling hydraulic
pressure
, 5. A technician has just 5. The correct answer is D. A metering valve requires a
overhauled the front brakes minimum pressure (typically between 75-125 psi) to
on a open. At
vehicle with front disc and this point pressurized fluid flows to the front calipers.
rear drum brakes. However, Since
when the bleeder tank is only pressurized to 25 psi, fluid
he attaches a pressure pressure
bleeder (pressurized to is too low to open the metering valve during this
about 25 procedure.
psi) to the master cylinder, Therefore, when you use a pressure bleeder on a system
he cannot get any fluid to with
come a metering valve, you must manually keep the valve
out of the disc brake caliper open by
bleeder screws. Which of either pushing the button in on the end of the valve, or
the pulling
following is MOST LIKELY the stem outward on the end of the valve.
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
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