In Level control, what are typical actuators?

In Level control, what are typical actuators?

• A. Pump and valve
• B. Heater and steam control valve
• C. Damper and blower
• D. Motor and switch

Answer: (A)

Level control hinges on actuators that directly change the amount of liquid in the vessel. A pump moves liquid into or out of the tank, while a control valve throttles the flow to increase or decrease the level as needed. In a typical feedback loop, the level sensor feeds the controller, which then drives the pump or valve to correct any deviation from the setpoint. The other options address different quantities: heating elements and steam valves affect temperature, not level; a damper and blower control air flow; and a motor with a switch is too generic and doesn’t specifically manipulate liquid quantity. So the pump and valve combination is the standard actuator pair for level control.

Level control hinges on actuators that directly change the amount of liquid in the vessel. A pump moves liquid into or out of the tank, while a control valve throttles the flow to increase or decrease the level as needed. In a typical feedback loop, the level sensor feeds the controller, which then drives the pump or valve to correct any deviation from the setpoint. The other options address different quantities: heating elements and steam valves affect temperature, not level; a damper and blower control air flow; and a motor with a switch is too generic and doesn’t specifically manipulate liquid quantity. So the pump and valve combination is the standard actuator pair for level control.