Which machine example demonstrates using one limit switch to control multiple cylinders?

• A. Crimping Machine
• B. Milling Machine
• C. Hydraulic Press
• D. Lathe

Answer: (C)

A limit switch serves as a trigger in a control circuit, and its signal can be used to energize multiple actuators through relays or valves. In a hydraulic press, several hydraulic cylinders may need to operate in coordinated timing—such as clamping and then pressing—so one limit switch can start the entire sequence by feeding the valve network that powers all those cylinders at once. This setup is common because the hydraulic system provides the pressure to drive several cylinders from a single control point, allowing synchronized action.

The other machines usually involve a single controlled cylinder or separate controls for different parts, so they don’t typically illustrate using one limit switch to drive multiple cylinders in a coordinated way.