SOS MECHANIC CERTIFICATION BUNDLE
ACTUAL EXAM 2026 QUESTIONS AND
COMPLETE ANSWERS
◉ Which 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.
◉ Most 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
◉ What 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
◉ The 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
◉ Which of the following is a true statement about proportioning
valves? Answer: They provide better braking balance during hard
stops
, ◉ A 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.
◉ Why don't disc brake system usually need adjustment? Answer: A
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? Answer: Defective metering valve
◉ The 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
◉ Which of the following would be the LEAST likely cause for an
intermittent problem in an ABS system? Answer: Open wheel sensor
circuit
◉ The 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.
ACTUAL EXAM 2026 QUESTIONS AND
COMPLETE ANSWERS
◉ Which 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.
◉ Most 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
◉ What 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
◉ The 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
◉ Which of the following is a true statement about proportioning
valves? Answer: They provide better braking balance during hard
stops
, ◉ A 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.
◉ Why don't disc brake system usually need adjustment? Answer: A
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? Answer: Defective metering valve
◉ The 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
◉ Which of the following would be the LEAST likely cause for an
intermittent problem in an ABS system? Answer: Open wheel sensor
circuit
◉ The 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.
