Red Seal Truck and Transport Mechanic Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Red Seal Truck and Transport Mechanic exam with interactive quizzes featuring multiple choice questions, explanations, and study materials. Get exam-ready, gain confidence, and achieve certification success!

Practice this question and more.

What type of fluid is typically found in a hydraulic brake system?

Water-based fluid
Brake fluid
Oil-based fluid
Air compressed fluid

The correct answer is: Brake fluid

The correct answer is brake fluid. In a hydraulic brake system, brake fluid is specifically formulated to transfer the force applied to the brake pedal through the brake lines to the brake components at the wheels. This fluid is designed to have a high boiling point to ensure it remains effective under intense heat generated during braking. Brake fluid also has properties that prevent corrosion and maintain lubrication within the system while not compressing under pressure. Unlike water, which could boil and create vapor pockets, or oil-based fluids that may not have the required freezing and boiling points necessary for automotive applications, brake fluid ensures the reliable operation of the hydraulic system. Additionally, air cannot be used because it can compress, leading to a loss of braking efficiency and pedal feel. Therefore, the use of brake fluid is essential for the safe and effective functioning of the hydraulic brake system in vehicles.