Rohmer Liu>试卷(2015/03/09)

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103 年 - 103年交通部第三次航海人員測驗 一等管輪 輪機工程(包括推進裝置、輔機與輪機英文)#19608 

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1.1.可變螺距螺槳(Controllable pitch propeller)倒俥時具有反應迅速之功能;其倒俥方式為 何?
(A)經換向裝置反轉主機
(B)經換向齒輪倒俥
(C)直接變更螺距進行倒俥
(D)經增速裝置間接反轉
2.2.下列主機性能曲線圖示中第①項所標示縱軸之意義為: 

(A)船速比率
(B)主機轉速比率
(C)主機運轉時數比率
(D)主機出力比率
3.3.油浴式艉軸管與後軸封相接觸的防蝕襯套,一般選用下列何種材料製造?
(A)黃銅
(B)鑄鐵
(C)鍍鉻鋼
(D)碳鋼
4.4.螺旋槳的任何修理工作應經過那個單位的檢認,始可獲得理賠及安全上的保障?
(A)船東互保協會
(B)保險公司
(C)驗船協會
(D)船東
5.5.主機產生之出力經由推進裝置傳至螺槳,而螺槳產生的推力又經過推進軸系傳到什麼軸承?
(A)艉軸承
(B)傳動軸承
(C)推力軸承
(D)主軸承
6.6.下列何者為船舶軸系中最易發生腐蝕現象的線軸?
(A)艉軸
(B)中間軸
(C)推力軸
(D)曲軸
7.7.艉軸與螺槳接合以傳達巨大的推力,其最主要受力部分為下列何處?
(A)槳轂上的鍵槽
(B)艉軸端接合面上的鍵
(C)艉軸法蘭上的螺栓
(D)艉軸端錐面接合處
8.8.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)撞彎
(D)折裂
9.9.空調冷凍裝置的蒸發溫度不宜太低的主要原因為何?
(A)冷凍係數過低
(B)空氣相對濕度太高
(C)防止蒸發器結霜
(D)防止蒸發器傳熱溫差過大
10.10.為提高船舶空調系統的經濟性,通常採用何種系統?
(A)閉式空氣循環系統
(B)直流送風系統
(C)新鮮空氣及回風混合系統
(D)再熱系統
11.11.造水機在運行中,真空破壞閥在何種狀況下可適當開啟?
(A)真空度太小
(B)真空度太大
(C)含鹽量太大
(D)產水量太大
12.12.和蒸發沸騰式相比,閃汽式海水淡化裝置的最主要特點為何?
(A)不易結水垢
(B)造價低
(C)淡水含鹽量較低
(D)造水量大
13.13.真空蒸餾式海水淡化裝置,因真空度過高,製造出的淡水品質下降,最好採取下列何種方法 來改善淡水品質?
(A)增大加熱熱水的流量
(B)減少冷卻水的流量
(C)減少真空泵的流量
(D)減少加熱熱水的流量
14.14.定溫式膨脹閥中,其感溫器(Thermo-bulb)內一般封存有下列何種液體?
(A)冷媒
(B)水銀
(C)水
(D)酒精
15.15.船用蒸餾式海水淡化裝置多在高真空條件下工作,其主要原理為何?
(A)降低海水沸點,以提高難溶鹽的溶解度
(B)容易操作
(C)便於管理
(D)造水量大
16.16.若電動往復泵排壓、流量正常,但電動機超載之原因為何?
(A)轉速太高
(B)活塞環或填料過緊
(C)安全閥開啟
(D)排出閥洩漏
17.17.在船舶駁油作業方面,下列何者不屬於從滴盤到疏油櫃管路應注意的事項之一?
(A)應使暢通
(B)應避免高溫
(C)應避免進水
(D)應以顏色標明
18.18.下列何者與泵在額定流量時的允許吸入真空度無關?
(A)吸入液體性質和溫度
(B)吸入液面大氣壓力的大小
(C)泵的結構參數
(D)泵排出液面壓力
19.19.引導式洩壓閥無法使壓力調降的可能原因為何?
(A)主閥上阻尼孔堵塞
(B)主閥芯與閥體間隙過大
(C)引導閥排洩孔堵塞
(D)主彈簧過硬
20.20.液壓系統初次使用前必須進行清洗,一般選擇清洗油的黏度原則是什麼?
(A)比工作油低
(B)盡可能高
(C)黏度相同
(D)比工作油稍高即可
21.21.有關1973/78防止船舶造成油污染的國際公約之污水排放規定,下列敘述何者正確?
(A)油水分離設備,分成分離設備與過濾設備二部分
(B)經過分離設備之流出物,其含油量須高於15 ppm
(C)經過過濾設備之流出物,其含油量須高於100 ppm
(D)分離設備不得與過濾設備串聯使用
22.22.有關工作流體流經噴射泵(Injection pump)的噴嘴(Nozzle)內不同截面積處之敘述,下 列何者正確?
(A)在截面積縮小處,流體的壓力上升
(B)在截面積縮小處,流體的流速下降
(C)在截面積擴大處,流體的壓力上升
(D)在截面積擴大處,容易形成真空
23.23.有關離心式泵(Centrifugal pump)當中,填料迫緊軸封(Stuffing box seal)的敘述,下列 何者正確?
(A)泵在運轉當中,軸封處漏水是不正常的現象
(B)一般以硬質合金或陶瓷製作
(C)需經常調整填料軸封的格蘭(Gland)壓蓋的鬆緊度,以維持合理的漏水量
(D)現今船舶,大多以填料軸封取代機械軸封
24.24.輔鍋爐的監視與警報系統中,控制方面常採用何種型式的壓力轉換進行水位檢測,而其轉換 器的輸出訊號通常為0.2~1.0 bar的氣壓訊號?
(A)差壓式
(B)增壓式
(C)累進壓力式
(D)指數壓力式
25.25.下列何者是「操舵裝置」的英文名詞?
(A)Stabilizer
(B)Thruster
(C)Winch
(D)Steering gear
26.26.鍋爐裝設表面吹洩裝置之目的為:
(A)提高蒸汽壓力
(B)提高空氣溫度
(C)保持爐水水質良好
(D)提高蒸汽溫度
27.27.船舶在發航前多少小時以內,船舶之操舵裝置應由該船之船員予以檢查及試驗?
(A)6
(B)8
(C)10
(D)12
28.28.依SOLAS電力與電動液壓操舵裝置之附加規定,主供電迴路及馬達應備防止過電流之保護裝 置,其電流不應低於受保護馬達或迴路滿載電流之多少倍?
(A)1
(B)2
(C)3
(D)4
29.29.依SOLAS救生艇推進之規定,每艘救生艇應以壓燃式引擎為動力。該引擎所用燃油之閃點 (flash point)應在攝氏幾度以上(採閉杯式試驗法),才能提供救生艇使用?
(A)43
(B)30
(C)20
(D)15
30.30.Magnetic bearings 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 generate 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.
31.31.Turbocharging tends to reduce fuel consumption because the friction losses of the turbocharged engine do not increase as fast as the increase in power output, and because the improved charging results in better combustion conditions. Based on this description, which is the correct statement?
(A)The friction losses of the turbocharged engine are beneficial for reducing fuel consumption.
(B)The better combustion conditions resulted from the improved charging are beneficial for reducing fuel consumption.
(C)The friction losses of the turbocharged engine are beneficial for better combustion conditions.
(D)The increased friction losses of the turbocharged engine are beneficial for better combustion condition.
32.32.Which is the equipment in a ship that often uses the heat recovered from the jacket water of a main diesel engine?
(A)Superheater of boiler
(B)Freshwater generating plant
(C)Exhaust-gas boiler
(D)Turbo-generator
33.33.Misalignment in shafting systems can produce very significant bending loads and this factor is probably responsible for the majority of inboard shafting failures. Therefore,
(A)the avoidance of misalignment is mainly for the minimization of outboard shafting failure.
(B)the misalignment has no influence on the loads applied on the outboard shafting.
(C)most of the inboard shafting failures could be attributed to the misalignment in shafting systems .
(D)the misalignment should be artificially introduced during the sea trial.
34.34.For a seawater cooled condenser in a steam turbine power plant, which is the correct statement regarding the seawater temperature and the performances of condenser?
(A)Low seawater temperature permits high vacuum of condenser.
(B)Low seawater temperature permits high steam saturated temperature in condenser.
(C)Low seawater temperature permits high steam dryness in condenser.
(D)High seawater temperature permits high moisture rate of steam in condenser.
35.35.The principal reason for turbocharging is to increase the power output of an engine of given size and speed, by enabling the cylinders to be charged with air at an elevated pressure and, therefore, at a higher density than air at atmospheric pressure. What is the main purpose to use a turbocharger?
(A)To elevate the density of air in order to decrease the pressure in cylinder.
(B)To elevate the pressure of air in order to decrease the density in cylinder.
(C)To improve the power output of an engine of given size and speed by increasing the compressed air intake temperature.
(D)To improve the power output of an engine of given size and speed by increasing the density of charged air.
36.36.The main function of the intercooler of a multistage air compressor is .
(A)to increase the enthalpy of working fluids
(B)to increase the entropy of working fluids
(C)to reduce the specific volume of working fluids
(D)to increase the internal energy of working fluids
37.37.Which equipment is an ejector that operates with a liquid motive fluid?
(A)Eductor
(B)De-ballasting device
(C)Ventilation gear
(D)Cavitation damper
38.38.Fuel oils vary widely in quality and often contain significant amounts of sulfur. Please select a following procedure that can form aquatic sulfuric acid in the exhaust gas path.
(A)Vaporization
(B)Sublimation
(C)Melting
(D)Condensation
39.39.Which section of the shafting system is used to secure the propeller?
(A)Thrust shaft
(B)Intermediate shaft
(C)Stern tube shaft
(D)Tail shaft
40.40.ABC乾粉所以能撲滅D類火災之主要關鍵為何?
(A)稀釋火場的空氣含量
(B)抑止可燃氣體的蒸發
(C)破壞燃燒連鎖反應
(D)降低燃燒溫度