【正文】
ow temperature C. high viscosity D. high flow rate 1178 A hydraulic motor may be driven by _____液壓馬達(dá)是由油來(lái)驅(qū)動(dòng)的。 A. an electric motor B. a diesel engine C. a pressor D. oil 1179 In a hydraulic system , _____ are used to protect the system from over pressure. 在液壓系統(tǒng)中,安全閥用來(lái)防止系統(tǒng)超壓。 A. stop valves B. check valves C. safety valves D. reducing valves 1180 _____ are used for cargo (克令吊 )可用來(lái)進(jìn)行貨物裝卸。 A. Cranes B. Mooring winches C. Windlasses D. Foreman 1176 B 1177 A 1178 D 1179 C 1180 A 1181 Among the basic categories of equipment, which of the following are used to allow the hydraulic energy to be controlled?在液壓系統(tǒng)中,液壓閥可實(shí)現(xiàn)對(duì)液壓能的控制。 A. hydraulic pumps B. valves C. hydraulic cylinders D. hydraulic motors 1182 _____ are used to handle anchors and 。 A. Cargo winches B. Mooring winches C. Windlasses D. Cargo hatches 1183 The drive motor will have a brake an~nged to failsafe, . it will _____ the load if power fails or machine is ,當(dāng)失電時(shí)它能支住貨物。 A. lift B. put C. take D. hold 1184 _____ are used for hauling in or letting out the wires which fasten the ship to the 。 A. Cargo winches B. Mooring winches C. Windlasses D. Cargo hatches 1185 The drive motor will have a brake arranged to failsafe, . it will _____ the load if power fails or machine is stopped. . 見(jiàn)第 1183題。 A. cast B. put C. hold D. let out 1181 B 1182 C 1183 D 1184 B 1185 C 1186 Among the basic categories of equipment, which of the following are used to convert mechanical into hydraulic energy7 在液壓系統(tǒng)中,液壓油泵將機(jī)械能轉(zhuǎn)變?yōu)橐簤耗堋? A. The hydraulic pumps B. Valves C. Hydraulic cylinders D. Hydraulic motors l 187 Among the basic categories of equipment, which of the following is used to convert hydraulic energy into continuous rotary motion.? 在液壓系統(tǒng)中,液壓馬達(dá)將液壓能轉(zhuǎn)變?yōu)槌掷m(xù)的回轉(zhuǎn)運(yùn)動(dòng)。 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. Relief valves B. Check valves C. Safety valves D. Reducing valve 1189 The rotor of the hydraulic motor rotates at a speed proportional to the _____ 液壓馬達(dá)轉(zhuǎn)子的回轉(zhuǎn)速度與油量有關(guān),而與油壓無(wú)關(guān)。 A. flow of oil B. pressure of oil C. A and B D. temperature of oil 1190 What type of valve is used to direct the flow of hydraulic fluid? 方向控制閥用來(lái)引導(dǎo)液壓流體的方向。 A. Relief valve B. Direction control valve C. Stop valve D. Pressure control valve 1186 A 1187 D 1188 D 1189 A 1190 B 1191 External and internal leakage in hydraulic systems may be caused by _____ 異常振動(dòng)、部件過(guò)度磨損、油壓異常等都會(huì)引起液壓系統(tǒng)內(nèi)外泄露。 A. unusual vibration B. excessive worn parts C. abnormal pressure D. any of the above 1192 In a general cargo crane, _____ is fitted to raise or lower the jib. 在回轉(zhuǎn)式起貨機(jī) (克令吊 )中,變幅裝置用于調(diào)節(jié)吊臂的高度。 A. the slewing motor B. the luffing motor C. the hoisting motor D. none of the above 1193 Among the basic categories of equipment, which of the following are used to convert the hydraulic energy into linear motion? 在液壓系統(tǒng)中,液壓油缸將液壓能轉(zhuǎn)變?yōu)橹木€性運(yùn)動(dòng)。 A. Hydraulic pumps B. Valves C. Hydraulic cylinders D. Hydraulic motors 1194 The single acting cylinder is the simplest form where pressure is applied to the full area of the piston head to move the load through piston rod extension. The load causes rod _____ when the drive pressure is ,壓力作用于整個(gè)柱塞頭部,通過(guò)柱塞桿的伸展傳遞負(fù)荷。當(dāng)驅(qū)動(dòng)壓力釋放后,負(fù)荷將會(huì)引起柱塞桿收進(jìn)。 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(jī) (克令吊 )中,回轉(zhuǎn)裝置用于旋轉(zhuǎn)克令。 A. the slewing motor B. the luffing motor C. the hoisting motor D. none of the above 1196 The crane is usually mounted on a pedestal to offer adequate _____ to the operator. 回轉(zhuǎn)式起貨機(jī) (克令吊 )一般安裝在平臺(tái)上,確保向操作者提供足夠的視野。 A. time B. space C. length D. visibility 1197 In a general cargo crane, _____ is fitted to lift the cargo load. 在回轉(zhuǎn)式起貨機(jī) (克令吊 )中,提升裝置用于裝卸貨物。 A. the slewing motor B. the luffing motor C. the hoisting motor D. none of the above 1198 When the union purchase derrick is operated, one derrick is positioned over the quayside and the other almost vertically over the _____ 在吊桿式起貨機(jī)中,一根吊桿位于碼頭上方,另一根幾乎垂直地位于貨艙的上方。 A. dock B. hold C. pedestal D. machinery space 1199 Cargo handling unit is rated according to the _____ to be lifted. 貨物裝卸裝置是根據(jù)裝卸的安全工作負(fù)荷標(biāo)定的。 A. cargo crane B. jib C. safe working load D. oil pressure 1196 D 1197 C 1198 B 1199 C 1200 B 1200 _____ play a very important part in hydraulic systems by preventing int6raction between different parts of the hydraulic circuit. 在液壓系統(tǒng)中,單向閥起很重要的作用,它能防止液壓油路中不同部件之間相互影響。 A. Motors B. Check valves C. Safety valves D. Reducing valve 1201 Which of the following can be used in hydraulic transmission system? 液壓系統(tǒng)中采用液壓油。 A. Hydraulic oil B. Animal oil C. Light oil D. Fuel oil 1202 _____ is the production of pure water from sea water by evaporation and recondensing 通過(guò)蒸發(fā)和再冷凝,由海水產(chǎn)生淡水的過(guò)程稱為“蒸餾”。 A. Evaporation B. Circulation C. Condensation