VERIFIED ANSWERS
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? - CORRECT ANSWERS-A plugged axle
Which of the following incorrect service procedures will cause brake lock-up? - CORRECT
ANSWERS-master cylinder push rod adjusted too long
Which of the following describes the proper way to depressurized an ABS system? - CORRECT
ANSWERS-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: - CORRECT ANSWERS-technician use the parking brake to adjust shoes and the
cable is stuck
When turning brake drums: - CORRECT ANSWERS-use a dampening strap to reduce chatter
Which of the following is NOT a necessary drum brake measurement? - CORRECT ANSWERS-
run-out
On a 3-channel system, which wheels are on the same circuit? - CORRECT ANSWERS-both
rear wheels
One way to test an ABS wheel speed signal is to use _____ on your digital multimeter. - CORRECT
ANSWERS-AC volts
The key input for the ABS control module comes from the: - CORRECT ANSWERS-wheel speed
sensors
, ABS speed sensor and sensor rings: - CORRECT ANSWERS-should not be hammered or tapped
on and should always be replaced as a matched set
Flexible brake hoses should be replaced: - CORRECT ANSWERS-when dampness is evident on
the hose
Which of the following should be used to check for rotor thickness variation: - CORRECT
ANSWERS-Micrometer
After rebuilding a master cylinder, the rod between the master cylinder and booster should be: -
CORRECT ANSWERS-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? - CORRECT ANSWERS-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? - CORRECT ANSWERS-Inspect disc brake pads for excessive wear
Which of the following is true about most properly functioning anti-lock brake systems? - CORRECT
ANSWERS-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? -
CORRECT ANSWERS-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: - CORRECT
ANSWERS-a "spaced-saver" spare tire is being used and mismatched tires are being installed
What does a load sensing proportioning valve do? - CORRECT ANSWERS-It increases the
hydraulic pressure during braking at the rear wheel cylinders when the vehicle is loaded