SOS MECHANIC CERTIFICATION- BRAKES QUESTIONS &
ANSWERS 2024 ( A+ GRADED 100% VERIFIED)
1. Most 1995 & newer vehicles use which of the following types of wheel bearings
on non-drive wheels?: sealed non-serviceable
2. To test a vacuum power brake booster in the vehicle, you should pump the
brake pedal at least 4 times, hold the brake pedal depressed, and start the engine.
The brake pedal should:: drop slightly and remain firm
3. You are installing a set of brake shoe linings that are not the same length.
Traditionally, the primary shoe lining is:: smaller and goes towards the front of the
car.
4. A cracked or torn vacuum diaphragm in a brake power booster would most
likely cause:: a hard pedal feel requiring very high pedal effort to stop
5. A mechanic finds gear lube inside both rear brake drums on a rear wheel
drive vehicle. What is the most likely cause of this problem?: a plugged axle
6. . Which of the following incorrect service procedures will cause brake lock-
up?: master cylinder push rod adjusted too long
7. Which of the following describes the proper way to depressurize an abs system?:
pump the brake pedal at least 25 times (or more, depending on the manufacturer's
recommendation) with the ignition off.
8. The rear brakes are dragging after having new linings installed and the drums
machined. The most likely cause is the:: technician used the parking brake to adjust
shoes and the cable was stuck
9. When turning brake drums:: use a dampening strap to reduce chatter
10. Which of the following is not a necessary drum brake measurement?: run-out
11. On a 3-channel system, which wheels are on the same circuit?: both rear
wheels
12. One way to test an ABS wheel speed signal is to use _____ on your digital
multimeter.: ac volts
13. The key input for the ABS control module comes from the:: wheel speed
sensors
14. Abs speed sensor and sensor rings:: should not be hammered or tapped on and
should always be replaced as a matched set
15. Flexible brake hoses should be replaced:: when dampness is evident on the hose
16. Which of the following should be used to check for rotor thickness variation::
micrometer
17. After rebuilding a master cylinder, the rod between the master cylinder and
booster should be:: adjusted properly
1/5
, .
18. upon inspecting the brake fluid condition, the technician observes the diaphragm
in the master cylinder cup is swollen. Which of the following is the most likely
cause?: silicone fluid added to the system
19. When inspecting brake fluid levels, a technician observes low fluid levels.
Which of the following should be done first?: inspect disc brake pads for excessive
wear
20. Which of the following is true about most properly functioning anti-lock
brake systems?: the brakes may lock up at speeds less than 10 miles per hour
21. 21. Which of the following is true about bleeding brake lines on most ABS-
equipped vehicles?: most ABS brake lines can be bled like a conventional (non-abs)
system. However, caution must be taken because of the extreme pressure.
22. Most anti-lock brake systems require the removal of the pressure modulator
fuse when:: a "spaced-saver" spare tire is being used and mismatched tires are being
installed
23. What does a load-sensing proportioning valve do?: it increases the hydraulic
pressure during braking at the rear wheel cylinders when the vehicle is loaded
24. 24. The brakes of a car squeal each time they are applied, which of the
following is the least likely source of the noise?: glazed brake pads
25. 25. Which of the following is a true statement about proportioning valves?: -
They provide better braking balance during hard stops
26. A properly functioning load-sensing proportioning valve will:: cause an
increase in the hydraulic pressure during braking at the rear wheel cylinders when the
vehicle is loaded.
27. Why doesn't the disc brake system usually need adjustment?: a certain amount
of pressure is maintained by the metering valve
28. The front brakes of a car equipped with disc brakes in the front and drum
brakes in the rear, grab quickly as light pressure is applied to the brake pedal,
which of the following could be the cause of the problem?: defective metering valve
29. The brake warning light on the dash stays on all the time, which of the
following could be the cause of the problem?: a problem in the hydraulic circuit
30. 30. Which of the following would be the least likely cause for an intermittent
problem in an ABS system?: open wheel sensor circuit
31. The brake lights on a car do not light when the brake pedal is depressed,
which of the following is the least likely cause of the problem?: a burned-out bulb?
32. Which of the following incorrect service procedures could cause brake pedal
pulsation?: incorrect run-out on the car brake lathe
33. what type of rotor surface provides the best braking with new pads?: a smooth,
flat surface
2/5
ANSWERS 2024 ( A+ GRADED 100% VERIFIED)
1. Most 1995 & newer vehicles use which of the following types of wheel bearings
on non-drive wheels?: sealed non-serviceable
2. To test a vacuum power brake booster in the vehicle, you should pump the
brake pedal at least 4 times, hold the brake pedal depressed, and start the engine.
The brake pedal should:: drop slightly and remain firm
3. You are installing a set of brake shoe linings that are not the same length.
Traditionally, the primary shoe lining is:: smaller and goes towards the front of the
car.
4. A cracked or torn vacuum diaphragm in a brake power booster would most
likely cause:: a hard pedal feel requiring very high pedal effort to stop
5. A mechanic finds gear lube inside both rear brake drums on a rear wheel
drive vehicle. What is the most likely cause of this problem?: a plugged axle
6. . Which of the following incorrect service procedures will cause brake lock-
up?: master cylinder push rod adjusted too long
7. Which of the following describes the proper way to depressurize an abs system?:
pump the brake pedal at least 25 times (or more, depending on the manufacturer's
recommendation) with the ignition off.
8. The rear brakes are dragging after having new linings installed and the drums
machined. The most likely cause is the:: technician used the parking brake to adjust
shoes and the cable was stuck
9. When turning brake drums:: use a dampening strap to reduce chatter
10. Which of the following is not a necessary drum brake measurement?: run-out
11. On a 3-channel system, which wheels are on the same circuit?: both rear
wheels
12. One way to test an ABS wheel speed signal is to use _____ on your digital
multimeter.: ac volts
13. The key input for the ABS control module comes from the:: wheel speed
sensors
14. Abs speed sensor and sensor rings:: should not be hammered or tapped on and
should always be replaced as a matched set
15. Flexible brake hoses should be replaced:: when dampness is evident on the hose
16. Which of the following should be used to check for rotor thickness variation::
micrometer
17. After rebuilding a master cylinder, the rod between the master cylinder and
booster should be:: adjusted properly
1/5
, .
18. upon inspecting the brake fluid condition, the technician observes the diaphragm
in the master cylinder cup is swollen. Which of the following is the most likely
cause?: silicone fluid added to the system
19. When inspecting brake fluid levels, a technician observes low fluid levels.
Which of the following should be done first?: inspect disc brake pads for excessive
wear
20. Which of the following is true about most properly functioning anti-lock
brake systems?: the brakes may lock up at speeds less than 10 miles per hour
21. 21. Which of the following is true about bleeding brake lines on most ABS-
equipped vehicles?: most ABS brake lines can be bled like a conventional (non-abs)
system. However, caution must be taken because of the extreme pressure.
22. Most anti-lock brake systems require the removal of the pressure modulator
fuse when:: a "spaced-saver" spare tire is being used and mismatched tires are being
installed
23. What does a load-sensing proportioning valve do?: it increases the hydraulic
pressure during braking at the rear wheel cylinders when the vehicle is loaded
24. 24. The brakes of a car squeal each time they are applied, which of the
following is the least likely source of the noise?: glazed brake pads
25. 25. Which of the following is a true statement about proportioning valves?: -
They provide better braking balance during hard stops
26. A properly functioning load-sensing proportioning valve will:: cause an
increase in the hydraulic pressure during braking at the rear wheel cylinders when the
vehicle is loaded.
27. Why doesn't the disc brake system usually need adjustment?: a certain amount
of pressure is maintained by the metering valve
28. The front brakes of a car equipped with disc brakes in the front and drum
brakes in the rear, grab quickly as light pressure is applied to the brake pedal,
which of the following could be the cause of the problem?: defective metering valve
29. The brake warning light on the dash stays on all the time, which of the
following could be the cause of the problem?: a problem in the hydraulic circuit
30. 30. Which of the following would be the least likely cause for an intermittent
problem in an ABS system?: open wheel sensor circuit
31. The brake lights on a car do not light when the brake pedal is depressed,
which of the following is the least likely cause of the problem?: a burned-out bulb?
32. Which of the following incorrect service procedures could cause brake pedal
pulsation?: incorrect run-out on the car brake lathe
33. what type of rotor surface provides the best braking with new pads?: a smooth,
flat surface
2/5
