SOS MECHANIC CERTIFICATION –BRAKES NEWWEST EXAM 2024/2025 WITH CORRECT ANSWERS A+
Most 1995 & newer vehicles use which of the following types of wheels bearings on non-drive wheel? -
ANSWER-Sealed non-serviceable
Wto 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
WYou 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.
WA 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
WA 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
WWhich of the following incorrect service procedures will cause brake lock-up? - ANSWER-master
cylinder push rod adjusted too long
WWhich 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.
WThe 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
WWhen turning brake drums: - ANSWER-use a dampening strap to reduce chatter
WWhich of the following is NOT a necessary drum brake measurement? - ANSWER-run-out
WOn a 3-channel system, which wheels are on the same circuit? - ANSWER-both rear wheels
,SOS MECHANIC CERTIFICATION –BRAKES NEWWEST EXAM 2024/2025 WITH CORRECT ANSWERS A+
WOne way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - ANSWER-AC
volts
WThe key input for the ABS control module comes from the: - ANSWER-wheel speed sensors
WABS speed sensor and sensor rings: - ANSWER-should not be hammered or tapped on and should
always be replaced as a matched set
WFlexible brake hoses should be replaced: - ANSWER-when dampness is evident on the hose
WWhich of the following should be used to check for rotor thickness variation: - ANSWER-Micrometer
WAfter rebuilding a master cylinder, the rod between the master cylinder and booster should be: -
ANSWER-adjusted properly
WUpon 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? - ANSWER-silicone fluid added to the
system
WWhen inspecting brake fluid levels, a technician observes low fluid levels. which of the following
should be done first? - ANSWER-Inspect disc brake pads for excessive wear
WWhich of the following is true about most properly functioning anti-lock brake systems? - ANSWER-
The brakes may lock up at speeds less than 10 miles per hour
WWhich of the following is true about bleeding brake lines on most ABS equipped vehicles? - ANSWER-
Most ABS brake lines can be bled like a conventional (non-ABS) system. However, caution must be taken
because of the extreme pressure.
WMost anti-lock brake systems require the removal of the pressure modulator fuse when: - ANSWER-a
"spaced-saver" spare tire is being used and mismatched tires are being installed
, SOS MECHANIC CERTIFICATION –BRAKES NEWWEST EXAM 2024/2025 WITH CORRECT ANSWERS A+
WWhat does a load sensing proportioning valve do? - ANSWER-It increases the hydraulic pressure
during braking at the rear wheel cylinders when the vehicle is loaded
WThe brakes of a car squeal each time they are applied, which of the following is the LEAST likely source
of the noise? - ANSWER-Glazed brake pads
WWhich of the following is a true statement about proportioning valves? - ANSWER-They provide better
braking balance during hard stops
WA properly functioning load sensing proportioning valve will: - ANSWER-cause an increase in the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded.
WWhy don't disc brake system usually need adjustment? - ANSWER-A certain amount of pressure is
maintained by the metering valve
WThe 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? - ANSWER-Defective metering valve
WThe brake warning light on the dash stays on all the time, which of the following could be the cause of
the problem? - ANSWER-A problem in the hydraulic circuit
WWhich of the following would be the LEAST likely cause for an intermittent problem in an ABS system?
- ANSWER-Open wheel sensor circuit
WThe brake lights on a car do not light when the brake pedal is depressed, which of the following is the
LEAST likely cause of the problem? - ANSWER-A burned out bulb.
WWhich of the following incorrect service procedures could cause brake pedal pulsation? - ANSWER-
incorrect run-out on the car brake lathe
WWhat type of rotor surface provides the best braking with new pads? - ANSWER-A smooth, flat surface
Most 1995 & newer vehicles use which of the following types of wheels bearings on non-drive wheel? -
ANSWER-Sealed non-serviceable
Wto 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
WYou 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.
WA 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
WA 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
WWhich of the following incorrect service procedures will cause brake lock-up? - ANSWER-master
cylinder push rod adjusted too long
WWhich 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.
WThe 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
WWhen turning brake drums: - ANSWER-use a dampening strap to reduce chatter
WWhich of the following is NOT a necessary drum brake measurement? - ANSWER-run-out
WOn a 3-channel system, which wheels are on the same circuit? - ANSWER-both rear wheels
,SOS MECHANIC CERTIFICATION –BRAKES NEWWEST EXAM 2024/2025 WITH CORRECT ANSWERS A+
WOne way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - ANSWER-AC
volts
WThe key input for the ABS control module comes from the: - ANSWER-wheel speed sensors
WABS speed sensor and sensor rings: - ANSWER-should not be hammered or tapped on and should
always be replaced as a matched set
WFlexible brake hoses should be replaced: - ANSWER-when dampness is evident on the hose
WWhich of the following should be used to check for rotor thickness variation: - ANSWER-Micrometer
WAfter rebuilding a master cylinder, the rod between the master cylinder and booster should be: -
ANSWER-adjusted properly
WUpon 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? - ANSWER-silicone fluid added to the
system
WWhen inspecting brake fluid levels, a technician observes low fluid levels. which of the following
should be done first? - ANSWER-Inspect disc brake pads for excessive wear
WWhich of the following is true about most properly functioning anti-lock brake systems? - ANSWER-
The brakes may lock up at speeds less than 10 miles per hour
WWhich of the following is true about bleeding brake lines on most ABS equipped vehicles? - ANSWER-
Most ABS brake lines can be bled like a conventional (non-ABS) system. However, caution must be taken
because of the extreme pressure.
WMost anti-lock brake systems require the removal of the pressure modulator fuse when: - ANSWER-a
"spaced-saver" spare tire is being used and mismatched tires are being installed
, SOS MECHANIC CERTIFICATION –BRAKES NEWWEST EXAM 2024/2025 WITH CORRECT ANSWERS A+
WWhat does a load sensing proportioning valve do? - ANSWER-It increases the hydraulic pressure
during braking at the rear wheel cylinders when the vehicle is loaded
WThe brakes of a car squeal each time they are applied, which of the following is the LEAST likely source
of the noise? - ANSWER-Glazed brake pads
WWhich of the following is a true statement about proportioning valves? - ANSWER-They provide better
braking balance during hard stops
WA properly functioning load sensing proportioning valve will: - ANSWER-cause an increase in the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded.
WWhy don't disc brake system usually need adjustment? - ANSWER-A certain amount of pressure is
maintained by the metering valve
WThe 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? - ANSWER-Defective metering valve
WThe brake warning light on the dash stays on all the time, which of the following could be the cause of
the problem? - ANSWER-A problem in the hydraulic circuit
WWhich of the following would be the LEAST likely cause for an intermittent problem in an ABS system?
- ANSWER-Open wheel sensor circuit
WThe brake lights on a car do not light when the brake pedal is depressed, which of the following is the
LEAST likely cause of the problem? - ANSWER-A burned out bulb.
WWhich of the following incorrect service procedures could cause brake pedal pulsation? - ANSWER-
incorrect run-out on the car brake lathe
WWhat type of rotor surface provides the best braking with new pads? - ANSWER-A smooth, flat surface
