Engine : Steam Plants - 430/811
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| A check valve is located between the economizer and the steam drum to __________. |
| A) prevent steam and water flow reversal from the drum should an economizer casualty occur |
| B) assure a positive feed water flow to the steam drum |
| C) prevent the feed pump from becoming vapor bound |
| D) assure a positive feed water flow through the economizer |
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