7. 下列何處常設空壓機之氣液分離器？
(A) 級間冷卻器後
(B) 後冷卻器前
(C) 後冷卻器後
(D) 可放在任何處

8. 軸向柱塞泵在柱塞與缸體之間磨損加大，造成的結果是： (A) 泵體發熱 (B) 流量降低 (C) 產生雜音 (D) 軸向力難以平衡

9. 內降熱器（Internal desuperheater）位於鍋爐的： (A) 煙道內 (B) 爐膛內 (C) 汽鼓內 (D) 水鼓內

10. 依 SOLAS 操舵裝置之規定，在何處應設置可切離自駕駛台操作之主、輔操舵裝置之控 制系統？ (A) 羅經甲板 (B) 機艙控制室 (C) 舵機房 (D) 艉樓甲板

11. The term compression-ignition refers to the fact that the fuel is ignited only by the high temperature of the compressed charge, and is one characteristic of the diesel engine cycle. Based on this description, which statement is correct? (A) When the fuel is ignited by the high temperature of expansion stroke, the engine is referred to as the compression ignition engine. (B) When the ignition of fuel is provided by the spark, the engine is referred to as the compression ignition engine. (C) When the fuel is ignited by the temperature of compressed stroke of a reciprocal engine, it is called the compression ignition engine. (D) When the compression charge could provide the high temperature for ignition, the fuel can not be automatically ignited in a compression ignition engine.

12. Magneticbearings are used in applications where noise and vibration are important considerations or where lubricants are not acceptable. Like the hydrostatic bearings they do not require shaft rotation to generated bearing support forces. The rotor is floated in the space and levitated by magnetic forces, which are generated within the bearing by magnets. Therefore, (A) the air is necessary to be used as the lubricant to provide the film pressure for magnetic bearings. (B) the air is necessary to be used as the lubricant to reduce the noise and vibration for magnetic bearings. (C) the shaft rotation is important for generating the supporting forces for the magnetic bearings. (D) the magnetic forces are generated in the magnetic bearing to support the load of bearing.

13. 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.

14. In a centrifugal blower in coming air is directed into the eye of a rotating open, semiopen, or closed impeller that increases the air’s velocity and static pressure. After passing through the impeller, the air is often discharged radially through a stationary diffuser in which a portion of the velocity head is converted into static pressure head, and then through a tangential outlet port in the blower’s casing. Based on these descriptions, which is the correct statement? (A) The conversion of flow kinetic energy into static pressure head takes place in the stationary diffuser. (B) The enthalpy of discharged gas is reduced after passing through the centrifugal blower. (C) The suction head for the centrifugal blower is automatically positive due to the eye of blower. (D) The static pressure is reduced in the impeller but to be recovered in the eye of centrifugal blower.

15. 推進傳動軸系在工作時所承受的各項應力，下列何者不正確？ (A) 承受摩擦力及腐蝕作用 (B) 承受扭應力及彎曲應力 (C) 承受剪應力及附加應力 (D) 承受壓應力及拉應力

16. 船舶軸系各線軸，其工作軸頸主要損壞的情形是那一種？ (A) 磨損 (B) 腐蝕 (C) 斷裂 (D) 裂紋

17. 冷凍系統中，滑油分離器裝設在下列那兩個元件之間？ (A) 壓縮機、凝結器 (B) 凝結器、膨脹閥 (C) 膨脹閥、蒸發器 (D) 蒸發器、壓縮機

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