SOS MECHANIC CERTIFICATION –BRAKES ,ELECTRICAL,HVAC
&SUSPENSION &STEERING EXAM 2024/2025 NEWEST !!! COMPLETE
ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS ) A GRADED.
Most 1995 & newer vehicles use which of the following types of
wheels bearings on non-drive wheel? - ANSWER-Sealed
nonserviceable
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: - 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: - 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: - 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? -
ANSWER-A plugged axle
,Which of the following incorrect service procedures will cause brake
lock-up? - ANSWER-master cylinder push rod adjusted too long
Which 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.
The 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
When turning brake drums: - ANSWER-use a dampening strap to
reduce chatter
Which of the following is NOT a necessary drum brake measurement?
- ANSWER-run-out
On a 3-channel system, which wheels are on the same circuit? -
ANSWER-both rear wheels
One way to test an ABS wheel speed signal is to use _____ on your
digital multimeter. - ANSWER-AC volts
The key input for the ABS control module comes from the: -
ANSWER-wheel speed sensors
,ABS speed sensor and sensor rings: - ANSWER-should not be
hammered or tapped on and should always be replaced as a matched
set
Flexible brake hoses should be replaced: - ANSWER-when dampness
is evident on the hose
Which of the following should be used to check for rotor thickness
variation: - ANSWER-Micrometer
After rebuilding a master cylinder, the rod between the master
cylinder and booster should be: - 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? - 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? - ANSWER-
Inspect disc brake pads for excessive wear
Which of the following is true about most properly functioning
antilock brake systems? - 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? - 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.
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