Some master cylinders use a portless ABS master cylinder design, which does not use a/n __ on the secondary circuit. Select one: a. Inlet port b. Reservoir port c. Compensating port d. Piston port

## Step 1<br />The problem is about the design of a portless ABS (Anti-lock Braking System) master cylinder. The ABS master cylinder is a critical component in the braking system of a vehicle. It is responsible for storing hydraulic fluid under pressure and delivering it to the wheel brakes when the brakes are applied.<br /><br />## Step 2<br />The ABS master cylinder has several ports, each serving a specific function. These include the inlet port, reservoir port, compensating port, and piston port.<br /><br />## Step 3<br />The portless ABS master cylinder design does not use a compensating port. The compensating port is typically used to allow excess hydraulic fluid to return to the reservoir, ensuring that the pressure in the system remains constant.<br /><br />## Step 4<br />The absence of a compensating port in the portless ABS master cylinder design means that the system does not have a dedicated return path for excess hydraulic fluid. This can lead to a buildup of pressure in the system, which can cause the ABS to activate prematurely.