ASVAB · General

What is the function of the brake system's master cylinder?

Correct answer

To convert the force from the brake pedal into hydraulic pressure that activates the brakes

A To pump fuel
B To convert the force from the brake pedal into hydraulic pressure that activates the brakes
C To charge the battery
D To turn the wheels

Why this is the answer

The MASTER CYLINDER converts the force from the brake pedal into HYDRAULIC PRESSURE, which is transmitted through brake lines to activate the brakes at each wheel. ASVAB Auto Information tests the brake system. When you press the pedal, the master cylinder pushes brake fluid through the lines to the wheel cylinders/calipers, which press the brake pads/shoes against the rotors/drums to slow the car (using Pascal's principle of hydraulics). Knowing the master cylinder's role in the hydraulic brake system is commonly tested.

Source: ASVAB Auto Information — Brake System

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What is the function of the brake system's master cylinder?

Why this is the answer

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