Which term describes a hand-operated switch equipped with an electrical device that restricts the movement of the switch?

• A. Electric Lock Switch
• B. Hand-Operated Switch
• C. Interlocking Switch
• D. Spring Switch

Answer: (A)

This question tests recognizing the term for a hand-operated switch that has an electrical locking device. An electric lock switch describes a manually operated switch that includes an electrical mechanism to lock or restrict its movement, so the switch can’t be moved unless the lock is released under proper conditions. This ensures safe, authorized operation and prevents incorrect routing when the route isn’t ready or protected by other signaling. A plain hand-operated switch lacks the locking device; an interlocking switch refers to coordinated control to prevent conflicting movements, not just a lock on a single switch; and a spring switch uses a spring mechanism to return to a default position, without the explicit electrical restriction described here.