SOS MECHANIC CERTIFICATION BRAKES
FINAL EXAMINATION TEST 2026 QUESTIONS
AND SOLUTIONS GRADED A+
● 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: 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: 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: 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?
Answer: A plugged axle
● Which of the following incorrect service procedures will cause brake
lock-up? Answer: master cylinder push rod adjusted too long
, ● Which of the following describes the proper way to depressurized an
ABS system? 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: Answer: technician use the
parking brake to adjust shoes and the cable is stuck
● When turning brake drums: Answer: use a dampening strap to reduce
chatter
● Which of the following is NOT a necessary drum brake measurement?
Answer: run-out
● On a 3-channel system, which wheels are on the same circuit?
Answer: both rear wheels
● One way to test an ABS wheel speed signal is to use _____ on your
digital multimeter. Answer: AC volts
● The key input for the ABS control module comes from the: Answer:
wheel speed sensors
FINAL EXAMINATION TEST 2026 QUESTIONS
AND SOLUTIONS GRADED A+
● 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: 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: 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: 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?
Answer: A plugged axle
● Which of the following incorrect service procedures will cause brake
lock-up? Answer: master cylinder push rod adjusted too long
, ● Which of the following describes the proper way to depressurized an
ABS system? 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: Answer: technician use the
parking brake to adjust shoes and the cable is stuck
● When turning brake drums: Answer: use a dampening strap to reduce
chatter
● Which of the following is NOT a necessary drum brake measurement?
Answer: run-out
● On a 3-channel system, which wheels are on the same circuit?
Answer: both rear wheels
● One way to test an ABS wheel speed signal is to use _____ on your
digital multimeter. Answer: AC volts
● The key input for the ABS control module comes from the: Answer:
wheel speed sensors
