T4 ASE BRAKES (MEDIUM/HEAVY
DUTY BRAKES) EXAM QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS
Technician A says that when replacing brake lines and/or hoses, always use lines and hoses designed for
and specifically labeled for use on ABS vehicles. Technician B says to use only the silicone-type brake
fluid in ABS. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - Technician A
Technician A says never begin to bleed the hydraulic brake system on a vehicle equipped with ABS until
you have checked a service manual for the proper procedure. Technician B says never open a bleeder
screw or loosen a hydraulic brake line or hose while the ABS is pressurized. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - Both A and B
Technician A says wheel sensors produce an analog AC voltage as the wheels rotate. Technician B says
some wheel-speed sensors produce a digital signal. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - Neither A or B
, Technician A says many ABSs have an accumulator that stores the high pressure for the system. The
accumulator must be fully depressurized. To depressurize the system, turn the ignition switch to the off
position, and pump the brake pedal between 25 and 50 times. Technician B says the brake pedal should
be noticeably softer when the accumulator is discharged. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - A only
Which of the following is not true?
a. During a test-drive of an ABS vehicle, both brake warning lights should remain off.
b. If the PCM detects a problem with the system, the ABS indicator lamp will either flash or light
continuously to alert the driver of the problem.
c. In some systems, an illuminated amber ABS indicator lamp indicates that the control unit detected a
problem but has not suspended ABS operation.
d. A solid amber ABS indicator lamp indicates that a problem has been detected that affects the
operation of the ABS. No antilock braking will be available, but normal, non-antilock brake performance
will remain. - ANSWER - b. If the PCM detects a problem with the system, the ABS indicator lamp will
either flash or light continuously to alert the driver of the problem.
A power brake system needs bleeding. Technician A says that a pressure bleeder must be used.
Technician B says that all the bleeder screws must be loosened, and all wheels bled at the same time.
Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - d. Neither A nor B
When servicing drum brake assemblies, Technician A washes brake dust off using aerosol brake cleaner
and a shop pan. Technician B cleans with an Occupational Safety and Health Administration (OSHA)-
approved washer. Who is correct?
a. Technician A
b. Technician B
DUTY BRAKES) EXAM QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS
Technician A says that when replacing brake lines and/or hoses, always use lines and hoses designed for
and specifically labeled for use on ABS vehicles. Technician B says to use only the silicone-type brake
fluid in ABS. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - Technician A
Technician A says never begin to bleed the hydraulic brake system on a vehicle equipped with ABS until
you have checked a service manual for the proper procedure. Technician B says never open a bleeder
screw or loosen a hydraulic brake line or hose while the ABS is pressurized. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - Both A and B
Technician A says wheel sensors produce an analog AC voltage as the wheels rotate. Technician B says
some wheel-speed sensors produce a digital signal. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - Neither A or B
, Technician A says many ABSs have an accumulator that stores the high pressure for the system. The
accumulator must be fully depressurized. To depressurize the system, turn the ignition switch to the off
position, and pump the brake pedal between 25 and 50 times. Technician B says the brake pedal should
be noticeably softer when the accumulator is discharged. Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - A only
Which of the following is not true?
a. During a test-drive of an ABS vehicle, both brake warning lights should remain off.
b. If the PCM detects a problem with the system, the ABS indicator lamp will either flash or light
continuously to alert the driver of the problem.
c. In some systems, an illuminated amber ABS indicator lamp indicates that the control unit detected a
problem but has not suspended ABS operation.
d. A solid amber ABS indicator lamp indicates that a problem has been detected that affects the
operation of the ABS. No antilock braking will be available, but normal, non-antilock brake performance
will remain. - ANSWER - b. If the PCM detects a problem with the system, the ABS indicator lamp will
either flash or light continuously to alert the driver of the problem.
A power brake system needs bleeding. Technician A says that a pressure bleeder must be used.
Technician B says that all the bleeder screws must be loosened, and all wheels bled at the same time.
Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B - ANSWER - d. Neither A nor B
When servicing drum brake assemblies, Technician A washes brake dust off using aerosol brake cleaner
and a shop pan. Technician B cleans with an Occupational Safety and Health Administration (OSHA)-
approved washer. Who is correct?
a. Technician A
b. Technician B
