SOS Mechanic Certification- Brakes
Most 1995 & newer vehicles use which of the following types of wheels bearings on non-drive
wheel? - ANSSealed 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: - ANSdrop
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: - ANSSmaller and goes towards the front of the car.
A cracked or torn vacuum diaphragm in a brake power booster would most likely cause: - ANSa
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? - ANSA plugged axle
Which of the following incorrect service procedures will cause brake lock-up? - ANSmaster
cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS system? - ANSPump
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: - ANStechnician use the parking brake to adjust shoes and the cable is
stuck
When turning brake drums: - ANSuse a dampening strap to reduce chatter
Which of the following is NOT a necessary drum brake measurement? - ANSrun-out
On a 3-channel system, which wheels are on the same circuit? - ANSboth rear wheels
One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - ANSAC
volts
The key input for the ABS control module comes from the: - ANSwheel speed sensors
ABS speed sensor and sensor rings: - ANSshould not be hammered or tapped on and should
always be replaced as a matched set
, Flexible brake hoses should be replaced: - ANSwhen dampness is evident on the hose
Which of the following should be used to check for rotor thickness variation: - ANSMicrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster should be: -
ANSadjusted 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? - ANSsilicone fluid
added to the system
When inspecting brake fluid levels, a technician observes low fluid levels. which of the following
should be done first? - ANSInspect disc brake pads for excessive wear
Which of the following is true about most properly functioning anti-lock brake systems? -
ANSThe 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? -
ANSMost 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: - ANSa
"spaced-saver" spare tire is being used and mismatched tires are being installed
What does a load sensing proportioning valve do? - ANSIt increases the hydraulic pressure
during braking at the rear wheel cylinders when the vehicle is loaded
The brakes of a car squeal each time they are applied, which of the following is the LEAST likely
source of the noise? - ANSGlazed brake pads
Which of the following is a true statement about proportioning valves? - ANSThey provide better
braking balance during hard stops
A properly functioning load sensing proportioning valve will: - ANScause an increase in the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded.
Why don't disc brake system usually need adjustment? - ANSA certain amount of pressure is
maintained by the metering valve
The front brakes of a car equipped with disc brakes in the front and drum brakes in the rear,
grab quickly as light pressure is applied to the brake pedal, which of the following could be the
cause of the problem? - ANSDefective metering valve
Most 1995 & newer vehicles use which of the following types of wheels bearings on non-drive
wheel? - ANSSealed 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: - ANSdrop
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: - ANSSmaller and goes towards the front of the car.
A cracked or torn vacuum diaphragm in a brake power booster would most likely cause: - ANSa
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? - ANSA plugged axle
Which of the following incorrect service procedures will cause brake lock-up? - ANSmaster
cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS system? - ANSPump
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: - ANStechnician use the parking brake to adjust shoes and the cable is
stuck
When turning brake drums: - ANSuse a dampening strap to reduce chatter
Which of the following is NOT a necessary drum brake measurement? - ANSrun-out
On a 3-channel system, which wheels are on the same circuit? - ANSboth rear wheels
One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - ANSAC
volts
The key input for the ABS control module comes from the: - ANSwheel speed sensors
ABS speed sensor and sensor rings: - ANSshould not be hammered or tapped on and should
always be replaced as a matched set
, Flexible brake hoses should be replaced: - ANSwhen dampness is evident on the hose
Which of the following should be used to check for rotor thickness variation: - ANSMicrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster should be: -
ANSadjusted 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? - ANSsilicone fluid
added to the system
When inspecting brake fluid levels, a technician observes low fluid levels. which of the following
should be done first? - ANSInspect disc brake pads for excessive wear
Which of the following is true about most properly functioning anti-lock brake systems? -
ANSThe 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? -
ANSMost 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: - ANSa
"spaced-saver" spare tire is being used and mismatched tires are being installed
What does a load sensing proportioning valve do? - ANSIt increases the hydraulic pressure
during braking at the rear wheel cylinders when the vehicle is loaded
The brakes of a car squeal each time they are applied, which of the following is the LEAST likely
source of the noise? - ANSGlazed brake pads
Which of the following is a true statement about proportioning valves? - ANSThey provide better
braking balance during hard stops
A properly functioning load sensing proportioning valve will: - ANScause an increase in the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded.
Why don't disc brake system usually need adjustment? - ANSA certain amount of pressure is
maintained by the metering valve
The front brakes of a car equipped with disc brakes in the front and drum brakes in the rear,
grab quickly as light pressure is applied to the brake pedal, which of the following could be the
cause of the problem? - ANSDefective metering valve
