Brake Systems Flashcards
7 cards from real Automotive and Mechanics practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Brake Systems flashcards as text
What type of brake fluid is most commonly specified for standard passenger vehicles in the United States?
Answer: DOT 3 (glycol-based)
DOT 3 is the most widely specified glycol-based brake fluid for standard passenger vehicles and meets FMVSS 116 requirements.
What is the primary function of the master cylinder in a hydraulic brake system?
Answer: Convert mechanical pedal force into hydraulic pressure
The master cylinder converts the mechanical force applied to the brake pedal into hydraulic pressure that travels through the lines to actuate the brakes.
Which type of brake assembly uses calipers that squeeze pads against a rotating disc to slow the vehicle?
Answer: Disc brake
Disc brakes use a caliper that clamps brake pads against a flat rotating rotor (disc), generating friction to decelerate the wheel.
What does the abbreviation ABS stand for in automotive brake terminology?
Answer: Anti-lock Braking System
ABS (Anti-lock Braking System) prevents wheel lockup during hard braking by rapidly modulating hydraulic pressure at each wheel.
At what minimum remaining thickness (mm) should disc brake pads typically be replaced?
Answer: 3 mm
Brake pads should be replaced at approximately 3 mm (about 1/8 inch) of remaining friction material to maintain safe stopping performance.
What is the primary purpose of a brake proportioning valve in a vehicle's brake system?
Answer: Limit hydraulic pressure to the rear brakes to prevent rear-wheel lockup
The proportioning valve limits rear brake pressure relative to front pressure so the lighter rear end does not lock up first, which could cause a spin.
The term 'brake fade' describes which condition?
Answer: A loss of braking effectiveness caused by overheated brakes
Brake fade occurs when brake components overheat, causing reduced friction coefficient and significantly longer stopping distances.