【正文】 interface towards the ___對于分水機，使用較大直徑的比重環(huán)，油水界面會向分離筒四周移動。 A. ballast water B. boiler water C. bilge water D. sewage water 1167 The bilge main is mamlged to drain any watertight partment _____ ballast, oil or water tanks and to discharge the contents overboard. 艙底水總管設(shè)計用來排放除了壓載艙、燃油艙和水艙之外的任何水密空間的污水到 舷外。 ② tube failure。 A. ① B. ① and ② C. ② D. neither ① and ② 1157 As for a oilfired boiler too much air would indicated by _____ 對于燒油鍋爐，空氣過多，火焰呈亮白色。 A. one to supply steam to the main propulsion turbine B. an auxiliary boiler C. A and B D. neither A nor B 1149 The safety valves should be tested and adjusted when the boiler survey is _____ 當進行鍋爐檢驗時，應(yīng)對鍋爐安全閥作試驗和調(diào)整。 A. filled with water B. purged C. cleared of air D. None of the above is true 1134 D 1135 B. 1136 C 1137 A 1138 B 1139 A 1140 B 1141 When steam is being raised on a boiler, the water level will normally _____ 鍋爐開始運行時，水位將隨鍋爐溫度的提高而升高。 A. in series B. in parallel C. either A or B D. None of the above is true 1133 If an operating auxiliary boiler has a water pH reading of 7, you should _____ 如果輔助鍋爐給水的 pH值是 7，則應(yīng)使用氫氧化鈉進行處理，使 pH值在 10左右； A. bottom blow the boiler B. treat the water with cat~stic soda C. treat the water with chemical scavengers D. reduce the water alkalinity to remended readings 1130 C 1131D 1132 A 1133 B 1134 The internal part of the boiler, if found _____ , has to be chemically washed by yard. 鍋爐內(nèi)側(cè)發(fā)現(xiàn)水垢，應(yīng)化學(xué)清洗。注意“ rise”與“ raise”之區(qū)別。 ② . they are selfpriming。 ② screw。 A. injector pumps B. positive displacement pumps C. centrifugal pumps D. centripetal pumps 1114 A _______ pump is that where the volume of the pump chamber is alternately increased to draw the liquid in and then decreased to force the liquid out. 對于容積式泵，泵腔室體積增大時吸人液體，體積減少時則排出液體。 A. throttling the pressure line B. changing the speed of the rotor C. either A or B D. None of the above is true. 1108 A positive displacement pump is that where the volume of the pump chamber is alternately increased to _______ and then decreased to 對于容積式泵，泵腔室體積增大時吸人液體，體積減少時則排出液體。 A. throttling the pressure line B. changing the speed of the rotor C. either A or B D. None of the above is true. 1102 While flowing through the volute in a centrifugal pump, part of the _______ energy of the liquid is converted to _______ energy. 當液體經(jīng)過離心泵的渦殼時，部分動能轉(zhuǎn)換成壓力能。 A. variable stroke pumps B. multistage pumps C. positive displacement pumps D. tripleported pumps 1094 Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid _______ ，齒輪泵的排量幾乎恒定。 A. one B. two C. three D. four 1093 The gear and screw pumps are classified as ____ 齒輪泵和螺桿泵都屬于容積式泵。 A. reciprocating pumps B. positive displacement pumps C. centrifugal pumps D. centripetal pumps 1095 B 1096 C 1097 B 1098 B 1099 C 1100 B 1101 The amount of fluid delivered by a screw pump can be regulated by _______ 齒輪泵屬于容積式泵，排量只能通過改變轉(zhuǎn)子的速度來調(diào)節(jié)。 A. ① only B. ① and ② C. ①② and ③ D. ② and ③ 1107 The amount of fluid delivered by a helical pump can be regulated by _______ 螺旋泵屬于容積式泵，排量只能通過改變轉(zhuǎn)子的速度來調(diào)節(jié)。 A. the mechanical seal B. packed stuffing boxes C. either A or B D. neither A nor B l 113 A reciprocating pump belongs to _______ according to its working principle. 根據(jù)工作原理，往復(fù)泵屬于容積式泵。 ① ejector。 A. ① and ② B. ① ② and ③ C. ① and ③ D. ② and ③ 1124 Which of the following operating features do displacement pumps bear if they are working under nocavitation condition? ① . output is almost directly proportional to speed。 A. increase discharge pressure B. increase suction vacuum C. develop pulsation flow D. keep a steady rate of flow 1129 The pipe friction and the resistance will ______ as a result of an increase in the amount of fluid flowing through the system. 系統(tǒng)流量增加時，管路摩擦和阻力將增大。 1132 Centrifugal pumps can be designed with a number of impellers _____ to attain a high final delivery ，可提高其排出壓頭?！?purge”意“驅(qū)氣”；而“ clear of air“清除空氣”。 A. fuel tank B. bilge C. atmosphere D. auxiliary exhaust hne 1148 A donkey boiler is _____輔鍋爐即輔助性鍋爐。 ② )increase feed pump pressure. 發(fā)現(xiàn)鍋爐水位表斷水，應(yīng)立即熄火，而不能盲目地增大給水泵的壓力。 1162 Which of the following may hardness of the boiler water cause? ① scale formation。 t discharge oil when pumping out _____見上題。意即，分油機運行一段時間，固體雜質(zhì)積聚在分離筒內(nèi)，當分油機停止運行時，才開始排渣。 A. stop valves B. check valves C. safety valves D. reducing valves 1180 _____ are used for cargo (克令吊 )可用來進行貨物裝卸。 A. Hydraulic pumps B. Valves C. Hydraulic cylinders D. Hydraulic motors 1188 _____ are used to limit the pressure in any particular portion and mainly control the pressure after the ，它主要是控制閥后的壓力。 A. contraction B. retraction C. expansion D. shrinkage 1191 D 1192 B 1193 C 1194 B 1195 A 1195 In a ordinary cargo crane, _____ is fitted to rotate the crane. 在回轉(zhuǎn)式起貨機 (克令吊 )中，回轉(zhuǎn)裝置用于旋轉(zhuǎn)克令。 A. Evaporation B. Circulation C. Condensation