The symbol for a pressure switch that closes on a rise of pressure is represented by what?

The symbol for a pressure switch that closes on a rise of pressure is accurately represented by a filled circle. This symbol indicates that the switch is active and will close its contacts when the pressure increases to a certain set point. In schematic diagrams, symbols are used to represent different electrical components, and a filled circle effectively conveys the concept of a switch being in a closed position relating to a rise in pressure.

In the context of electrical symbols, other formations represent different functions. A dashed line may signify a connection that is not solid or a specific type of element, while a rectangle with arrows typically indicates valves or flow direction. A circle with a closing mark could represent a different type of operation or a different configuration of a switch. Hence, the filled circle uniquely captures the essence of a pressure switch closing due to higher pressure, making it the correct choice for this scenario.