The rubber used in most brake system components will swell if exposed to ________.
A) Moisture in the air B) Engine oil or ATF C) DOT 5 brake fluid D) Water
Question 2
What part in the master cylinder helps keep air from contacting the brake fluid yet allows the fluid level to drop as the disc brakes wear?
A) Residual valve B) Rubber diaphragm or floating disc
C) Compensating port D) Vent valve