SOS MECHANIC CERTIFICATION TEST 2025
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Most 1995 & newer vehicles use Sealed non-serviceable
which of the following types of
wheels bearings on non-drive
wheel?
to test a vacuum power brake drop slightly and remain firm
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:
You are installing a set of brake Smaller and goes towards the front of the car.
shoe linings that are not the
same length. Traditionally, the
primary shoe lining is:
A cracked or torn vacuum a hard pedal feel requiring very high pedal effort to stop
diaphragm in a brake power
booster would most likely cause:
A mechanic finds gear lube A plugged axle
inside both rear brake drums on
a rear wheel drive vehicle. What
is the most likely cause of this
problem?
Which of the following incorrect master cylinder push rod adjusted too long
service procedures will cause
brake lock-up?
, Which of the following Pump the brake pedal at least 25 times (or more, depending on
describes the proper way to the manufacturer's recommendation) with the ignition off.
depressurized an ABS system?
The rear brakes are dragging technician use the parking brake to adjust shoes and the cable is
after having new linings installed stuck
and the drums machined. the
most likely cause is the:
When turning brake drums: use a dampening strap to reduce chatter
Which of the following is NOT a run-out
necessary drum brake
measurement?
On a 3-channel system, which both rear wheels
wheels are on the same circuit?
One way to test an ABS wheel AC volts
speed signal is to use _____ on
your digital multimeter.
The key input for the ABS wheel speed sensors
control module comes from the:
ABS speed sensor and sensor should not be hammered or tapped on and should always be
rings: replaced as a matched set
Flexible brake hoses should be when dampness is evident on the hose
replaced:
Which of the following should Micrometer
be used to check for rotor
thickness variation:
After rebuilding a master adjusted properly
cylinder, the rod between the
master cylinder and booster
should be:
Upon inspecting brake fluid silicone fluid added to the system
condition, the technician
observes the diaphragm in the
master cylinder cup is swollen.
Which of the following is the
most likely cause?
When inspecting brake fluid Inspect disc brake pads for excessive wear
levels, a technician observes low
fluid levels. which of the
following should be done first?
Which of the following is true The brakes may lock up at speeds less than 10 miles per hour
about most properly functioning
anti-lock brake systems?
Which of the following is true Most ABS brake lines can be bled like a conventional (non-ABS)
about bleeding brake lines on system. However, caution must be taken because of the extreme
most ABS equipped vehicles? pressure.
Most anti-lock brake systems a "spaced-saver" spare tire is being used and mismatched tires
require the removal of the are being installed
pressure modulator fuse when: