海巡行政 110 年輪機工程考古題

請問主推進軸系必須具備那些功能，方能滿足船舶主機正常運轉之 需求？（20 分）

請繪一簡圖說明在冷凍系統中如何利用從壓縮機輸出之高溫冷媒氣體， 流經蒸發器之管圈加以加熱，以達自主除霜之目的。（20 分）

理論上在鍋爐系統中若節熱器之排氣出口溫度愈低，則其廢熱回收率愈高， 鍋爐之熱效率亦愈高。但實際上節熱器廢氣之排出溫度亦不得過低，請 詳述其原因。（20 分）

請將下列專業英文翻譯成中文：（20 分） Water, oil, and other substances collect at the bottom of the ship in what is known as the bilge. Bilge water is pumped overboard, but must pass a pollution threshold test of 15 ppm（parts per million）of oil to be discharged. Water is tested and either discharged if clean or recirculated to a holding tank to be separated before being tested again. The tank it is sent back to, the oily water separator, utilizes gravity to separate the fluids due to their viscosity.

請將下列專業名詞翻譯成中文：（每小題2 分，共20 分） ㈠Stop check valve ㈡Flange ㈢Nominal pipe diameter ㈣Expansion valve ㈤Condenser ㈥Boiler ㈦Evaporator ㈧Relay Bilge water Self-Priming