What does the acronym EPU represent in power systems?

• A. Emergency Power Unit
• B. External Power Utility
• C. Electronic Power Unit
• D. Engineered Power Unit

Answer: (A)

The main idea is identifying what EPU stands for and its role as a backup power source in power systems. EPU stands for Emergency Power Unit, which is a device or system designed to supply electricity to essential loads when the primary power source fails. This ensures critical functions—like safety systems, emergency lighting, and essential equipment—remain operational during outages. The other terms don’t fit standard power-system terminology: the external power utility refers to the grid or utility company providing normal power, while electronic power unit or engineered power unit are not commonly used, recognized names for on-site emergency backup power. So the best answer is Emergency Power Unit because it directly describes a backup power source activated during emergencies.