SOS MECHANIC CERTIFICATION - BRAKES
EXAM (2024-2025)
Which of the following types of non-drive wheel bearings are used in the majority
of 1995 and newer vehicles? - ANSWER Sealed non-serviceable
To test a vacuum power brake booster in your car, pump the brake pedal at least
four times, keep it depressed, and start the engine. The brake pedal should decrease
slightly but stay solid.
You're installing a set of brake shoe linings that aren't all the same length.
Traditionally, the major shoe lining is smaller and located towards the front of the
car.
A broken or torn vacuum diaphragm in a brake power booster would most likely
cause: - A harsh pedal feel that requires very high pedal effort to stop.
A mechanic discovers gear lube within both rear brake drums on a rear-wheel drive
automobile. What's the most likely cause of this issue? - ANSWER A clogged axle.
Which of the following faulty service techniques will result in brake lockup? -
ANSWER: The master cylinder push rod was adjusted too long.
Which of the following describes how to properly depressurize an ABS? -
ANSWER With the ignition turned off, pump the brake pedal at least 25 times (or
more, if recommended by the manufacturer).
The rear brakes are dragging after new linings were placed and the drums
machined. The most likely cause is: - ANSWER: The technician used the parking
brake to adjust shoes, and the cable became trapped.
When turning brake drums: Use a dampening strap to eliminate chatter.
, Which of the following is not a required drum brake measurement? - ANSWER ran
out
In a three-channel system, which wheels are on the same circuit? - ANSWER: Both
rear wheels
One method for testing an ABS wheel speed signal is to utilize _____ on your
digital multimeter. - ANSWER AC Volts
The ABS control module receives its key input from the - ANSWER: Wheel speed
sensors
ABS speed sensor with sensor rings: - ANSWER should never be pounded or
tapped, and it should always be replaced as a matched pair.
Flexible brake hoses need to be replaced. - Answer when wetness is seen on the
hose.
Which of the following should be used to check for variations in rotor thickness?
ANSWER Micrometer
After replacing a master cylinder, the rod between the master cylinder and the
booster should be appropriately adjusted.
After evaluating the brake fluid condition, the technician notices that the diaphragm
in the master cylinder cup is bloated. Which of the following is the most plausible
explanation? - silicone fluid was added to the system.
EXAM (2024-2025)
Which of the following types of non-drive wheel bearings are used in the majority
of 1995 and newer vehicles? - ANSWER Sealed non-serviceable
To test a vacuum power brake booster in your car, pump the brake pedal at least
four times, keep it depressed, and start the engine. The brake pedal should decrease
slightly but stay solid.
You're installing a set of brake shoe linings that aren't all the same length.
Traditionally, the major shoe lining is smaller and located towards the front of the
car.
A broken or torn vacuum diaphragm in a brake power booster would most likely
cause: - A harsh pedal feel that requires very high pedal effort to stop.
A mechanic discovers gear lube within both rear brake drums on a rear-wheel drive
automobile. What's the most likely cause of this issue? - ANSWER A clogged axle.
Which of the following faulty service techniques will result in brake lockup? -
ANSWER: The master cylinder push rod was adjusted too long.
Which of the following describes how to properly depressurize an ABS? -
ANSWER With the ignition turned off, pump the brake pedal at least 25 times (or
more, if recommended by the manufacturer).
The rear brakes are dragging after new linings were placed and the drums
machined. The most likely cause is: - ANSWER: The technician used the parking
brake to adjust shoes, and the cable became trapped.
When turning brake drums: Use a dampening strap to eliminate chatter.
, Which of the following is not a required drum brake measurement? - ANSWER ran
out
In a three-channel system, which wheels are on the same circuit? - ANSWER: Both
rear wheels
One method for testing an ABS wheel speed signal is to utilize _____ on your
digital multimeter. - ANSWER AC Volts
The ABS control module receives its key input from the - ANSWER: Wheel speed
sensors
ABS speed sensor with sensor rings: - ANSWER should never be pounded or
tapped, and it should always be replaced as a matched pair.
Flexible brake hoses need to be replaced. - Answer when wetness is seen on the
hose.
Which of the following should be used to check for variations in rotor thickness?
ANSWER Micrometer
After replacing a master cylinder, the rod between the master cylinder and the
booster should be appropriately adjusted.
After evaluating the brake fluid condition, the technician notices that the diaphragm
in the master cylinder cup is bloated. Which of the following is the most plausible
explanation? - silicone fluid was added to the system.
