A brake system is being discussed. Technician A states that a soft or spongy pedal is a good indication that there could be air in the hydraulic system. Technician B states that engineers use different input and output piston sizes to precisely control brake unit output force. Who is correct? a. Technician A b. Technician B c. Both Technician A and Technician B d. Neither Technician A nor Technician B

c. Both Technician A and Technician B<br /><br />Technician A is correct in stating that a soft or spongy pedal can indicate air in the hydraulic system. Air in the hydraulic system can cause a spongy brake pedal because air is compressible, unlike brake fluid, which is incompressible. This can lead to a reduction in braking power and efficiency.<br /><br />Technician B is also correct in stating that engineers use different input and output piston sizes to precisely control brake unit output force. By varying the sizes of the pistons, engineers can adjust the force exerted by the brake unit, allowing for precise control over the braking force applied to the wheels. This is important for ensuring safe and effective braking performance.