How do pushbuttons differ from selector switches in control circuits?

• A. Pushbuttons can be momentary or maintained; selector switches choose a position or mode.
• B. Pushbuttons are momentary only; selector switches are maintained.
• C. Pushbuttons and selector switches are both used to monitor status only.
• D. Pushbuttons supply motor power directly; selector switches do not.

Answer: (C)

Pushbuttons and selector switches are both control-input devices, not status-monitoring devices. The key difference is how they deliver a control signal to the circuit. A pushbutton acts as an actuator: pressing it makes or breaks a circuit, and it can be momentary (returns to its original state when released) or maintained (stays in its new state until pressed again or reset). A selector switch, in contrast, is used to choose a discrete position or mode (such as manual, auto, or off) and is typically maintained in the chosen position until you change it.

That’s why the best description is that pushbuttons provide a momentary or maintained control signal, while selector switches set and maintain a specific operating position or mode. They are not primarily used to monitor status. The other statements are incorrect because pushbuttons can be maintained, selector switches can be momentary in some types, and these devices are used to control circuits—not to directly supply motor power or merely monitor status.