Which of the following is an example of an OUTPUT?

• A. Red pilot light
• B. Stop pushbutton
• C. Float switch
• D. Start pushbutton

Answer: (A)

In electrical control circuits, outputs are devices that respond to the controller to produce a result, such as indicating status or driving a load. A red pilot light fits this role because it lights up when the controller supplies power to it, providing a visual indication of the system’s state. It doesn’t sense the process or initiate action; it simply displays information from the control logic. The other items are inputs: pushbuttons are operator-supplied signals used to start or stop the process, and a float switch is a level sensor that sends a signal to the controller based on fluid level. So the red pilot light is the best example of an OUTPUT.