SOS MECHANIC CERTIFICATION-
BRAKES
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
When inspecting brake fluid levels, a technician observes low fluid levels. which of the following
should be done first? - CORRECT ANSWER -Inspect disc brake pads for excessive wear
Which of the following is true about most properly functioning anti-lock brake systems? - CORRECT
ANSWER -The brakes may lock up at speeds less than 10 miles per hour
Which of the following is true about bleeding brake lines on most ABS equipped vehicles? - CORRECT
ANSWER -Most ABS brake lines can be bled like a conventional (non-ABS) system. However, caution
must be taken because of the extreme pressure.
Most anti-lock brake systems require the removal of the pressure modulator fuse when: - CORRECT
ANSWER -a "spaced-saver" spare tire is being used and mismatched tires are being installed
BRAKES
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
When inspecting brake fluid levels, a technician observes low fluid levels. which of the following
should be done first? - CORRECT ANSWER -Inspect disc brake pads for excessive wear
Which of the following is true about most properly functioning anti-lock brake systems? - CORRECT
ANSWER -The brakes may lock up at speeds less than 10 miles per hour
Which of the following is true about bleeding brake lines on most ABS equipped vehicles? - CORRECT
ANSWER -Most ABS brake lines can be bled like a conventional (non-ABS) system. However, caution
must be taken because of the extreme pressure.
Most anti-lock brake systems require the removal of the pressure modulator fuse when: - CORRECT
ANSWER -a "spaced-saver" spare tire is being used and mismatched tires are being installed
