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ASE T5 EXAM STUDY GUIDE 2 VERSIONS 550
QUESTIONS AND CORRECT DETAILED SOLUTIONS
WITH RATIONALES LATEST UPDATED VERSION JUST
RELEASED
Question: 1. A technician has just overhauled the front brakes on a
vehicle with front disc and rear drum brakes. However, when
he attaches a pressure bleeder (pressurized to about 25
psi) to the master cylinder, he cannot get any fluid to come
out of the disc brake caliper bleeder screws. Which of the
following is 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 - ANSWER✔✔5. The correct answer is D. A
metering valve requires a
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minimum pressure (typically between 75-125 psi) to open. At
this point pressurized fluid flows to the front calipers. Since
the bleeder tank is only pressurized to 25 psi, fluid pressure
is too low to open the metering valve during this procedure.
Therefore, when you use a pressure bleeder on a system with
a metering valve, you must manually keep the valve open by
either pushing the button in on the end of the valve, or pulling
the stem outward on the end of the valve.
Question: 2. On a vehicle with 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
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B. Technician B only
C. Both A and B
D. Neither A or B - ANSWER✔✔6. The correct answer is B. Excessive rotor runout would
cause a pulsating brake pedal, but not uneven side-to-side pad
wear. A frozen caliper piston on the other hand, will keep both
inner and outer brake pads equally applied against the rotor
even when the brake pedal is released. This constant friction
will cause rapid pad wear in the affected caliper as well as a
front-end pull.
Question: 3. What is the purpose of the bar that is being removed
from the brake assembly shown below?
A. to equalize the braking force between the shoes
during normal braking
B. to center the shoes after each brake application
C. to force the shoes into the drum when the parking
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brakes are applied
D. to reduce the distance between the shoes and the
drum - ANSWER✔✔7. The correct answer is C. The parking brake strut bar
forces the brake shoes into the drum when the parking brake
is applied.
Q:1. On a car with disc/drum brakes, the front brakes grab
quickly when light pedal pressure is applied. This problem
could be caused by a bad:
A. proportioning valve
B. pressure safety switch
C. metering valve
D. residual check valve - ANSWER✔✔1. The correct answer is C. The metering valve delays
the flow of brake fluid to the front calipers until the pressure
in the system rises to a point where the wheel cylinder can
overcome the tension of the brake shoe return springs. The
ASE T5 EXAM STUDY GUIDE 2 VERSIONS 550
QUESTIONS AND CORRECT DETAILED SOLUTIONS
WITH RATIONALES LATEST UPDATED VERSION JUST
RELEASED
Question: 1. A technician has just overhauled the front brakes on a
vehicle with front disc and rear drum brakes. However, when
he attaches a pressure bleeder (pressurized to about 25
psi) to the master cylinder, he cannot get any fluid to come
out of the disc brake caliper bleeder screws. Which of the
following is 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 - ANSWER✔✔5. The correct answer is D. A
metering valve requires a
, Page 2 of 248
minimum pressure (typically between 75-125 psi) to open. At
this point pressurized fluid flows to the front calipers. Since
the bleeder tank is only pressurized to 25 psi, fluid pressure
is too low to open the metering valve during this procedure.
Therefore, when you use a pressure bleeder on a system with
a metering valve, you must manually keep the valve open by
either pushing the button in on the end of the valve, or pulling
the stem outward on the end of the valve.
Question: 2. On a vehicle with 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
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B. Technician B only
C. Both A and B
D. Neither A or B - ANSWER✔✔6. The correct answer is B. Excessive rotor runout would
cause a pulsating brake pedal, but not uneven side-to-side pad
wear. A frozen caliper piston on the other hand, will keep both
inner and outer brake pads equally applied against the rotor
even when the brake pedal is released. This constant friction
will cause rapid pad wear in the affected caliper as well as a
front-end pull.
Question: 3. What is the purpose of the bar that is being removed
from the brake assembly shown below?
A. to equalize the braking force between the shoes
during normal braking
B. to center the shoes after each brake application
C. to force the shoes into the drum when the parking
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brakes are applied
D. to reduce the distance between the shoes and the
drum - ANSWER✔✔7. The correct answer is C. The parking brake strut bar
forces the brake shoes into the drum when the parking brake
is applied.
Q:1. On a car with disc/drum brakes, the front brakes grab
quickly when light pedal pressure is applied. This problem
could be caused by a bad:
A. proportioning valve
B. pressure safety switch
C. metering valve
D. residual check valve - ANSWER✔✔1. The correct answer is C. The metering valve delays
the flow of brake fluid to the front calipers until the pressure
in the system rises to a point where the wheel cylinder can
overcome the tension of the brake shoe return springs. The
