SOS Mechanic Certification- Brakes
2025/2026 Complete Questions And
Correct Answers (Verified
Answers)|Brand New Version Grade
A+!
Most 1995 & newer vehicles use which of the following types of wheels bearings
on non-drive wheel? Correct Answer: Sealed non-serviceable
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: Correct Answer: drop slightly and remain firm
You are installing a set of brake shoe linings that are not the same length.
Traditionally, the primary shoe lining is: Correct Answer: Smaller and goes
towards the front of the car.
A cracked or torn vacuum diaphragm in a brake power booster would most
likely cause: Correct Answer: a hard pedal feel requiring very high pedal effort
to stop
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? Correct Answer: A
plugged axle
Which of the following incorrect service procedures will cause brake lock-up?
Correct Answer: master cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS
system? Correct Answer: Pump the brake pedal at least 25 times (or more,
depending on the manufacturer's recommendation) with the ignition off.
, The rear brakes are dragging after having new linings installed and the drums
machined. the most likely cause is the: Correct Answer: technician use the
parking brake to adjust shoes and the cable is stuck
When turning brake drums: Correct Answer: use a dampening strap to reduce
chatter
Which of the following is NOT a necessary drum brake measurement? Correct
Answer: run-out
On a 3-channel system, which wheels are on the same circuit? Correct Answer:
both rear wheels
One way to test an ABS wheel speed signal is to use _____ on your digital
multimeter. Correct Answer: AC volts
The key input for the ABS control module comes from the: Correct Answer:
wheel speed sensors
ABS speed sensor and sensor rings: Correct Answer: should not be hammered or
tapped on and should always be replaced as a matched set
Flexible brake hoses should be replaced: Correct Answer: when dampness is
evident on the hose
Which of the following should be used to check for rotor thickness variation:
Correct Answer: Micrometer
After rebuilding a master cylinder, the rod between the master cylinder and
booster should be: Correct Answer: adjusted properly
Upon inspecting brake fluid condition, the technician observes the diaphragm
in the master cylinder cup is swollen. Which of the following is the most likely
cause? Correct Answer: silicone fluid added to the system
2025/2026 Complete Questions And
Correct Answers (Verified
Answers)|Brand New Version Grade
A+!
Most 1995 & newer vehicles use which of the following types of wheels bearings
on non-drive wheel? Correct Answer: Sealed non-serviceable
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: Correct Answer: drop slightly and remain firm
You are installing a set of brake shoe linings that are not the same length.
Traditionally, the primary shoe lining is: Correct Answer: Smaller and goes
towards the front of the car.
A cracked or torn vacuum diaphragm in a brake power booster would most
likely cause: Correct Answer: a hard pedal feel requiring very high pedal effort
to stop
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? Correct Answer: A
plugged axle
Which of the following incorrect service procedures will cause brake lock-up?
Correct Answer: master cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS
system? Correct Answer: Pump the brake pedal at least 25 times (or more,
depending on the manufacturer's recommendation) with the ignition off.
, The rear brakes are dragging after having new linings installed and the drums
machined. the most likely cause is the: Correct Answer: technician use the
parking brake to adjust shoes and the cable is stuck
When turning brake drums: Correct Answer: use a dampening strap to reduce
chatter
Which of the following is NOT a necessary drum brake measurement? Correct
Answer: run-out
On a 3-channel system, which wheels are on the same circuit? Correct Answer:
both rear wheels
One way to test an ABS wheel speed signal is to use _____ on your digital
multimeter. Correct Answer: AC volts
The key input for the ABS control module comes from the: Correct Answer:
wheel speed sensors
ABS speed sensor and sensor rings: Correct Answer: should not be hammered or
tapped on and should always be replaced as a matched set
Flexible brake hoses should be replaced: Correct Answer: when dampness is
evident on the hose
Which of the following should be used to check for rotor thickness variation:
Correct Answer: Micrometer
After rebuilding a master cylinder, the rod between the master cylinder and
booster should be: Correct Answer: adjusted properly
Upon inspecting brake fluid condition, the technician observes the diaphragm
in the master cylinder cup is swollen. Which of the following is the most likely
cause? Correct Answer: silicone fluid added to the system
