Why does the emergency feed pump have a service air connection?

• A. To permit operation with air when steam is not available
• B. To lubricate seals with oil
• C. To provide cooling for the pump
• D. To electrically isolate the pump

Answer: (A)

The key idea is that the emergency feed pump must be operable even if the steam supply isn’t available. The service air connection provides a pneumatic power source to start and run the pump when steam isn’t present, ensuring you can deliver feedwater to the boiler in an emergency. This keeps the boiler from losing level and helps prevent damage while steam power is restored. It isn’t used for lubrication, cooling, or electrical isolation, which is why those options aren’t correct.