【正文】 tive 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(duì)于容積式泵，泵腔室體積增大時(shí)吸人液體，體積減少時(shí)則排出液體。 A. ① only B. ② only C. ① and ② D. ① ② and ③ l l 12 Shaft sealing in a centrifugal pump can be effected by _______ 離心泵的軸封可用機(jī)械密封，也可用填料箱。 ② the pump shaft。 A. suction B. exhaust C. pressure D. discharge 1110 As for a hydraulic single action vane pump, the inner wall of the stator is usually of ______ ，靜子的內(nèi)壁通常是圓形。 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(duì)于容積式泵，泵腔室體積增大時(shí)吸人液體，體積減少時(shí)則排出液體。 ③ centrifugal. 往復(fù)泵和旋渦泵都具有干吸能力，而離心泵沒有。 A. throttling the pressure line B. changing the speed of the driving rotor C. either A or B D. None of the above is true. 1101 B 1102 A 1103 C 1104 B 1105 B 1106 Which of the following pumps are seEpriming, and can deal with hquid from a level below the pump? ① reciprocating。 A. throttling the pressure line B. changing the speed of the rotor C. either A or B D. None of the above is true. 1104 The amount of fluid delivered by a reciprocating pump can be regulated by ______ 往復(fù)泵屬于容積式泵，排量通過改變柱塞的速度來調(diào)節(jié)。 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(dāng)液體經(jīng)過離心泵的渦殼時(shí)，部分動(dòng)能轉(zhuǎn)換成壓力能。 C. triple screw pump D. centripetal pump 1100 A Screw pump belongs to _______ according to its working principle. 根據(jù)工作原理，螺桿泵屬于容積式泵。 A. propeller B. impeller C. circumference D. screw 1098 The discharge flow of a reciprocating pump is____ 往復(fù)泵的排量具有脈沖性。 A. reciprocating pumps B. positive displacement pumps C. centrifugal pumps D. centripetal pumps 1096 The pressure head of a pump is given in the unit of _______ 泵的壓頭常用“米液柱”高度表示。 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. positive displacement B. ejector C. centrifugal D. air pressor 1092 A monopump is a singlescrew pump. That means it consists of _______ rotor(s). 單螺桿泵只有一個(gè)轉(zhuǎn)子。 第二章船舶輔助機(jī)械 1090 A vane pump belongs to _______ according to its working principle. 根據(jù)工作原理，葉片泵屬于容積式泵。 A. reciprocating pump B. positive displacement pump C. centrifugal pump D. centripetal pump 1091 Through a _______ pump, the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers. 對(duì)于容積式泵，液體通過泵腔室體積的改變從吸入口排至排出口。 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. depending on B. in relative to C. regardless of D. because of 1090 B 1091 A 1092 A 1093 C 1094 C 1095 A gear pump belongs to _______ according to its working principle. 根據(jù)工作原理，齒輪泵屬于容積式泵。 A. kg B. MPa C. meter fluid colunm D. None of the above is true. 1097 A centrifugal pump produces the required pressure energy by means of a rotating _______ provided with 。 A. steady B. in pulsation C. continuous D. large 1099 In a _______ the center screw is driven and the outer screws idle. A. single screw pump B. doublescrew pump在三螺桿泵中，只有中間螺桿被驅(qū)動(dòng)。 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. kiic/pressure B. kiic/essential C. pressure/kiic D. pressure/height 1103 The amount of fluid delivered by a centrifugal pump can be regulated by _______ 離心泵的排隊(duì)量可通過改變壓力來調(diào)節(jié)，出可通過改變轉(zhuǎn)子的速度調(diào)節(jié)。 A. throttling the pressure line B. changing the speed of the piston C. either A or B D. None of the above is tree. 1105 The amount of fluid delivered by a positive displacement pump can be regulated by _____對(duì)于容積式泵，排量只能通過改變轉(zhuǎn)子的速度來調(diào)節(jié)。 ② rotary。 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. draw the liquid in/force the liquid out B. force the liquid out / draw the liquid in C. suction/draw D. deliver/outl