Engine : Steam Plants - 538/811
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| Which of the conditions listed may be indicated by the lifting of the DC heater relief valve? |
| A) Low water level continually maintained in the DC heater. |
| B) Excessive deaeration of the feed water. |
| C) Low back pressure in the auxiliary exhaust line. |
| D) A malfunctioning auxiliary exhaust make-up steam regulating valve. |
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