28.沸騰式與閃發式海水淡化裝置之工作原理的主要區別為何？
(A)兩者海水加熱和海水的真空度不同
(B)兩者海水汽化和蒸汽冷凝的真空度不同
(C)後者海水在壓力下加熱而在真空下汽化，前者都在真空條件下
(D)前者海水在壓力下加熱而在真空下汽化，後者都在真空條件下

12.Which property of a fuel could affect the ability to separate water and solids from a fuel by settling and centrifuging devices? (A)Heating value (B)Density (C)Ignition quality (D)Flash point

13.In a gas turbine engine, which device is used during the compression process to enhance the specific power of the engine? (A)Recuperator (B)Intercooler (C)Air intake (D)Exhaust uptake

14.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.

15.Flash evaporators generally use a “once through” system whereby the entire seawater feed is preheated through the stage condensers and seawater feed heater and allowed to flash down through the stages. The distilled water was produced at a pressure lower than the vapor pressure of the entering heated seawater. The resultant brine from the last stage is pumped overboard. When the sea water was heated up to 85℃fro normal operation, which following statement is correct? (A)The operating pressure inside the flash evaporator is less than atmospheric pressure. (B)There is no brine produced in the flash evaporator. (C)The fresh water generated inside this flash evaporator is suitable for direct drink of any crew member. (D)The seawater is not evaporated in the flash evaporator due to low entry temperature.

16.船舶建造之初及機艙空間採型之際，其軸系中心測定由何種方法來決定？ (A)光學儀器測量法 (B)聯軸節測量法 (C)頂高試驗法 (D)同軸度試驗法

17.特種海洋探測船由於需經常改變航速、高轉矩力及高可變螺槳轉動的方向及速度，設計上最適採 用何種推進系統？ (A)直接傳動系統 (B)間接傳動系統 (C)電力推進系統 (D)水翼推進系統

18.船舶進塢艉軸進行檢驗，除船廠、驗船師、監督相關人員到場外，下列何者應在現場協助檢驗？ (A)船長 (B)大副 (C)輪機長 (D)大管

19.油壓馬達除有提供進、回油的主油管外，殼體上尚有其他何種油管？ (A)直通油櫃的油管 (B)經釋壓閥通油櫃的油管 (C)經卸荷閥回油櫃的油管 (D)沒有油管

20.徑向柱塞油壓泵用於推動舵軛時，當舵角達到預定角度時，如何使舵停下來？ (A)回授機構使偏心距歸零 (B)回授機構切斷泵運轉 (C)回授機構將油壓旁流 (D)回授機構將油液改向

21.螺槳產生之推力經過艉軸、中間軸傳到推力軸承上，最終藉由推力軸承作用到何處？ (A)推力塊 (B)推力軸承座 (C)主機機座 (D)船體

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