What is the purpose of brake lines and hoses? a. To carry brake fluid from the master cylinder to the wheel brake units b. To carry brake fluid from the power brake booster to the master cylinder c. To modify the brake fluid pressure to the brake units d. To protect the brake units from corrosion

The correct answer is a. To carry brake fluid from the master cylinder to the wheel brake units.<br /><br />Brake lines and hoses are an integral part of the braking system in a vehicle. Their primary purpose is to transport brake fluid from the master cylinder to the wheel brake units. This brake fluid is essential for transmitting the force generated by the driver pressing the brake pedal to the brake pads or shoes, which then apply the necessary force to the brake rotors or drums to stop the vehicle.<br /><br />Option b is incorrect because the power brake booster does not directly carry brake fluid to the master cylinder. Instead, it amplifies the force applied by the driver to the brake pedal using vacuum or hydraulic pressure.<br /><br />Option c is incorrect because brake lines and hoses do not modify the brake fluid pressure. The pressure is determined by the force applied by the driver to the brake pedal and the design of the braking system.<br /><br />Option d is incorrect because while brake lines and hoses may provide some protection to the brake units from external contaminants, their primary purpose is not to protect the brake units from corrosion. Corrosion protection is typically provided by additives in the brake fluid and coatings on the brake components.