________ can be used to supply power during long power outages.

• A. Uninterruptable power supplies
• B. Electrical generators
• C. Both A and B
• D. Neither A nor B

Answer: (B)

Power duration is the key idea. A UPS provides immediate, short-term power to keep equipment running and to ride through brief outages or power fluctuations, but its batteries are limited and it’s not meant to supply power for extended periods. For long outages, you need a source that can run on fuel and deliver power for hours or days, which is what a generator provides. In practice, a generator can sustain operations for as long as fuel remains available, making it the suitable choice for extended outages.