25. 造水裝置之真空泵功能為抽真空，抽取真空之目的為何？ (A) 真空狀態下的鹽度低 (B) 真空狀態下的飽和溫度低 (C) 真空狀態下殺菌較徹底 (D) 真空狀態下滷水的水面低

39. Check valves must be provided on pump suctions to prevent pumping through the standby pump to the sump. Pump isolating valves should be provided to permit underway repair of either pump. Based on these descriptions, which is the correct statement？ (A) The isolating valves must be non-return valves. (B) The check valve also needs to be positioned at the pump exit in order to improve the pumping efficiency. (C) The check valve allocated on pump suctions permits no flow from the idle pump into the sump. (D) The check valve allocated on pump suctions permits the isolation of the running and standby pumps so that the isolating valves could be ignored for the emergency operation.

25. 造水裝置之真空泵功能為抽真空，抽取真空之目的為何？
(A) 真空狀態下的鹽度低
(B) 真空狀態下的飽和溫度低
(C) 真空狀態下殺菌較徹底
(D) 真空狀態下滷水的水面低

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