| When securing a seawater-cooled shell-and-tube heat exchanger for an extended period of time, what statement represents the recommended operating procedure? |
| A) The seawater side of the heat exchanger should be drained, then flushed with freshwater and left completely filled with freshwater. |
| B) The seawater side of the heat exchanger should be drained by opening the drain valves, while insuring that the vent valves remain closed while draining. |
| C) The seawater side of the heat exchanger should be left completely filled with seawater. |
| D) The seawater side of the heat exchanger should be drained by opening the drain valves, while insuring that the vent valves remain open while draining. |
