T4 ASE BRAKES (MEDIUM/HEAVY
DUTY BRAKES) EXAM QUESTIONS
AND ANSWERS
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 - C
2. The driver of a vehicle with power disc/drum brakes
says that the brake pedal moves slowly to the floor while
maintaining pedal pressure at a stoplight. What could
cause this problem?
A. leaking primary piston cup in master cylinder
B. leaking power brake booster
C. leaking residual check valve in master cylinder
D. internal leak in the combination valve - ANSWER - A
3. Which of the following would MOST LIKELY happen
if the measurements taken from the check shown above
varied from the manufacturer's specifications?
A. noisy brake operation
B. brake grab or pull
,C. pulsating brake pedal
D. low brake pedal - ANSWER - C
4. 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 the hydraulic
pressure
D. reduces pedal pulsation by controlling hydraulic
pressure - ANSWER - B
5. 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 - D
6. 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
B. Technician B only
C. Both A and B
D. Neither A or B - ANSWER - B
7. 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
brakes are applied
D. to reduce the distance between the shoes and the
drum - ANSWER - C
8. A hydraulic brake line is leaking. Which of the following is
the correct repair procedure?
A. Cut out the bad section and replace with new steel
tubing using compression fittings.
B. Replace the leaking line with double-flared, seamless
copper tubing.
C. Cut out the bad section and replace with single-flared
steel tubing using flare nuts and unions.
D. Replace the leaking line with double-flared steel
tubing. - ANSWER - D
9. The set-up shown above is used to check: (dial indicator on rotor face)
A. rotor parallelism
B. wheel bearing adjustment
DUTY BRAKES) EXAM QUESTIONS
AND ANSWERS
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 - C
2. The driver of a vehicle with power disc/drum brakes
says that the brake pedal moves slowly to the floor while
maintaining pedal pressure at a stoplight. What could
cause this problem?
A. leaking primary piston cup in master cylinder
B. leaking power brake booster
C. leaking residual check valve in master cylinder
D. internal leak in the combination valve - ANSWER - A
3. Which of the following would MOST LIKELY happen
if the measurements taken from the check shown above
varied from the manufacturer's specifications?
A. noisy brake operation
B. brake grab or pull
,C. pulsating brake pedal
D. low brake pedal - ANSWER - C
4. 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 the hydraulic
pressure
D. reduces pedal pulsation by controlling hydraulic
pressure - ANSWER - B
5. 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 - D
6. 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
B. Technician B only
C. Both A and B
D. Neither A or B - ANSWER - B
7. 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
brakes are applied
D. to reduce the distance between the shoes and the
drum - ANSWER - C
8. A hydraulic brake line is leaking. Which of the following is
the correct repair procedure?
A. Cut out the bad section and replace with new steel
tubing using compression fittings.
B. Replace the leaking line with double-flared, seamless
copper tubing.
C. Cut out the bad section and replace with single-flared
steel tubing using flare nuts and unions.
D. Replace the leaking line with double-flared steel
tubing. - ANSWER - D
9. The set-up shown above is used to check: (dial indicator on rotor face)
A. rotor parallelism
B. wheel bearing adjustment
