COMPLETE SOLUTION.
A cracked or torn vacuum diaphragm in a brake power booster would
most likely cause: ~CORRECT ANSWER~✓✓a hard pedal feel requiring
very high pedal effort to stop
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: ~CORRECT ANSWER~✓✓drop slightly
and remain firm
A mechanic finds gear lube inside both rear drums on a rear wheel drive
vehicle. What is most likely the cause of this problem? ~CORRECT
ANSWER~✓✓a plugged axle
The rear brakes are dragging after having new linings installed and the
drums machined. the most likely cause is the: ~CORRECT
ANSWER~✓✓technician use the parking brake to adjust shoes and the
cable is stuck
While test driving a car, the mechanic finds that the right front brake
"grabs". The most likely cause of this problem is: ~CORRECT
ANSWER~✓✓brake fluid or grease on the brake linings
, Which of the following incorrect service procedures will cause brake lock-
up? ~CORRECT ANSWER~✓✓master cylinder push rod adjusted too long
Which of the following incorrect service procedures could cause brake
pedal pulsation? ~CORRECT ANSWER~✓✓incorrect run-out on the car
brake lathe
A common cause of pedal pulsation during brake application is:
~CORRECT ANSWER~✓✓NOT caused by improperly torqued wheels,
damaged backing plates, or lubricated shims
A properly functioning load sensing proportioning valve will: ~CORRECT
ANSWER~✓✓cause an increase in the hydraulic pressure during braking at
the rear wheel cylinders when the vehicle is loaded.
which of the following is a quick way to isolated a defective master
cylinder? There are no external leaks in the system. ~CORRECT
ANSWER~✓✓pump up the brake pedal, then hold it firm. if the pedal
slowly drops to the floor, the master cylinder may be defective.
After rebuilding a master cylinder, the rod between the master cylinder
and booster should be: ~CORRECT ANSWER~✓✓adjusted properly