On a steam vessel, if a centrifugal main feed pump were operating at shutoff head with the recirculating line closed, which of the following conditions could occur?

Correct Answer: Option C — Flashing at the suction side of the pump.

Operating a centrifugal main feed pump against a shutoff head with a closed recirculating valve traps energy, causing rapid water temperature rise, vaporization, and flashing at the pump suction.