Which statement about a UPS is true?

• A. It increases system voltage during normal operation
• B. It supplies power to only one device
• C. It stores energy for emergency shutdown for extended periods
• D. It provides power during outages for a brief period

Answer: (D)

An Uninterruptible Power Supply stores energy in its batteries and uses that energy to keep equipment running when the main power drops out. The statement that best fits is that it provides power during outages for a brief period, giving you time to bridge the gap or shut systems down safely. It isn’t meant to raise voltage during normal operation, and while some UPS models offer voltage regulation, boosting power isn’t their primary purpose. Also, the energy in a UPS battery is limited, so it’s generally used for short outages rather than extended ones—longer outages require another source such as a generator.