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STATE BRAKE CERTIFICATION
QUESTIONS AND ANSWER S
ALREADY GRADED A+
Question : 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
Question : 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
Question : 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
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Question : 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
Question : 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
Question : Which of the following incorrect service
procedures will cause brake lock-up?
Correct answer: master cylinder push rod adjusted too
long
Question : Which of the following incorrect service
procedures could cause brake pedal pulsation?
Correct answer: incorrect run-out on the car brake lathe
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Question : A common cause of pedal pulsation during
brake application is:
Correct answer: NOT caused by improperly torqued
wheels, damaged backing plates, or lubricated shims
Question : 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.
Question : 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.
Question : Upon inspecting brake fluid condition, the
technician observes the diaphragm in the master cylinder
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cup is swollen. Which of the following is the most likely cause?
Correct answer: silicone fluid added to the system
Question : When inspecting brake fluid levels, a
technician observes low fluid levels. which of the following should be done first?
Correct answer: Inspect disc brake pads for excessive
wear
Question : During a road test, you find that when normal
braking pressure is applied the pedal slowly goes to the floor. what is the most likely cause of this problem?
Correct answer: a leaking master cylinder primary piston
seal
Question : Before replacing a hydralic brake hose on an
ABS equipped vehicle, you should first:
Correct answer: relieve brake system pressure according
to manufacturer procedures