| When placing a shell-and-tube heat exchanger with a removable tube bundle such as a bayonet-tube heavy fuel oil service heater into service, to prevent water hammer what statement represents the correct operating procedure? |
| A) Crack open the condensate drains first. Gradually introduce the steam, then close the condensate drains when no longer draining condensate and issuing dry steam. Finally, introduce the heavy fuel oil. |
| B) Introduce the heavy fuel oil first, then crack open the condensate drains. Gradually introduce the steam, then close the condensate drains when no longer issuing dry steam and draining condensate. |
| C) Crack open the condensate drains first. Gradually introduce the steam, then close the condensate drains when no longer issuing dry steam and draining condensate. Finally, introduce the heavy fuel oil. |
| D) Introduce the heavy fuel oil first, then crack open the condensate drains. Gradually introduce the steam, then close the condensate drains when no longer draining condensate and issuing dry steam. |
