Can directional control valves be operated by multiple methods?

Directional control valves can indeed be operated by multiple methods, making the assertion true. These valves are critical in hydraulic and pneumatic systems as they control the direction of fluid flow. The various methods of operation for directional control valves include manual operation, where an operator physically moves the lever; pneumatic operation, which utilizes air pressure to actuate the valve; hydraulic operation, where hydraulic fluid pressure is used; and electrically operated methods, which may involve solenoids or motors to control the valve actuation.

This versatility allows for the implementation of directional control valves in a wide array of applications, catering to different operational requirements and preferences based on the specific system design or environmental conditions. Therefore, it's essential for millwrights and technicians to understand the different methods available for operating these valves to effectively manage and troubleshoot fluid power systems.