SOS Mechanic Certification- Brakes
UPDATED ACTUAL Exam Questions and
CORRECT Answers
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
UPDATED ACTUAL Exam Questions and
CORRECT Answers
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
