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ASE Brakes Practice Test
A5 Brakes
ASE Brakes
A5 Brakes Practice Test
Question 1 of 3
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A vehicle stops but the brake pedal fades completely to the floorboard afterwards. There are no external leaks. Which of these is the most likely cause of this condition.
A
Faulty vacuum brake booster.
B
Master cylinder cup seals.
C
Clogged vacuum booster check valve.
D
Dark discolored brake fluid.
Master cylinder cup seals wear and create an internal leak. The pedal fades to the floor as fluid bypasses the seal.
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