国家电网职称英语考试复习题-补全短文.docx

WORD格式补全短文Passage 1Functions of power transmission CEADB The function of (1) is to send power fromA. step-down substations and connected transmission equipmentB. power network operationC. power transmissionD. transmission at high voltageE. power networksPassage 2 Substationmisoperationand itspreventingCEABDThe misopemtion that can lead to (1)A. preventing the misoperation in substationB. the closing of grounding switch with power onC. accidents in the electrical operation of the substation D. the persons from illegal entering the lived bayE. the grounding wire (closing the grounding switch) with power onPassage 3 A brief introduction on the development of supercritical boilers and their main advantages BDEACIn (1) such as U.S.A ， Japan and EuropeanA. good homogenization of distribution B. some advanced countriesC. whole process management is strengthenedD. great advantages oil economy and environmental protectionE. subcritical once-through boilerPassage 4 Steam generation and useBEADCSteam is one of mans dependable servants More and more in the background ， steam is doing more and more work for man. In (1)A. first generating steamB. an electrically heated homeC. use of steam for electric power generationD. the new generating capacity being installedE. the fuel is uranium and the heat is suppliedPassage 5 Circuit breakerBDAECCircuit breakers are automatically operated high voltage (or high current) switches. Circuit breakers are required (1)B. to control electrical power networks C. of the circuit breakerD. to switch the current which can be from a few amperesE. of the highest importance for high reliabilityPassage 6 The ratio of distance to height of pumped-storage power plant BDACEFor pumped-storage power plant, generally the ratio of distance to height (l),A. is most economicB. is used to evaluate topographic condition of power plantC. is not desirableD. is the ratio of horizontal distance between upper and low reservoirE. is the bestPassage 7 Fuel cellsBAECDFuel cells are devices that when a fuel such as hydrogen or hydrogen-rich compounds and oxygen are supplied to materials arranged like the anode and cathode of a conventional batteryA . further development is under wayB. there is no storage capacity in a fuel cellC. many cells are operated in series to obtain voltages D. supply alternating current from fuel cellsE. as they are being developed there have been some applicationsPassage 8 Substations pace into the Digital Age CAEBDSubstations constitute the main part of power transmission and distribution in a power grid. The substations (1)A. substation automation technology has reached a certain levelB. simulation training technology for substation operationC. composed of a large number of primary and secondary equipmentsD. a full-digital automation systemE. all of which has become an indisputable fact专业资料整理A·to perform any switching operation after long periodsPassage 9 Overcoming the Problem of WasteCADEBMany large cities are anything but beautiful Streets arelittered with trash. In this trash, however, (1)A. there is no time to be lostB. building beautiful cities out of garbage is only a dreamC. there is still something that can be useful D. it can be put to use againE. more and more machines are designed for this purposePassage 10 HibernationEBDACThe weather in winter. Call be very cold. Some animals sleep during the winter, for it's difficult for them to find food then. (1)Passage 13 Switching overvoltageEABCDA sudden change in the configuration of transmission network caused (1)A. determine the insulation requirements of transmission linesB. the cost of transmission and 1ine failure rate C. at both opening and closing of circuit breakersD. by means of circuit breaker closing resistor in 500kV systemE. by the operation of a circuit breakerPassage 14Transmission lineand distributionlineADBCEThe high voltage power line through which power is (1)A. So they don needt to worry about bad weather andA. transmitted from power plants step-up substation toother dangerous animalsstep-down substationB. We call this kind of sleep in wintertime“ hibernationB. the overhead transmission lineC. As it gets warmer and warmer in spring ， the sleepingC. lightning frequently happening and heavy raininganimals begin to wake up and look around for foodD.the powerlinethattransmitsthepowerfromD. Hibernating animals don t need to eat much becausestep-down substationthey don t moveE. 1arge spanning line sectionE. They can sleep for a long timePassage 15 Transformer insulationCEABDPassage 11 SatellitesBDACEThe body that is neatest to the Earth is the moon. (1).A. The bigger and heavier a body is, the greater is its force of gravityB. It circles the Earth and is therefore know as a satellite of the EarthC. To get out into space we have to overcome the Earth s gravitational pullD. A satellite stays in orbit because the planet gravitational force keeps pulling it into a circleE. Artificial satellite can be used for various purposesPassage 12Secondary equipmentinpowersystemBDEACThe secondary equipments in power system are (1)A. 5A rated current of the current transformer secondary windingB. the equipments that provide protecting ，monitoring C. 50V rated voltage of PT secondary sideD. the equipments that send the command signals E. current values in secondary systemThe insulation of a transformer can be categorized into internal insulation and external insulation. (1)A. The main insulation materials inside transformer are transformer oilB. The degradation of insulating properties of insulation materials under long period of influenceC. The internal insulation refers to the insulation of various parts inside the oil tankD If the winding temperature is within the scope of 80 140 oCE. The main insulation refers to the insulation between windings and grounding parts and the insulation between windingsPassage 16 The electricity marketBDAECThe aim of introducing market mechanism is to bring various parties more economic benefit through equitable competition ， thereby promote economic development.Like other markets, it needs (1)A. to agree on the price and quantity to be traded B. a wholesale marketC. to register as a market customerD. a retail marketE. to choose electricity suppliersPassage 17 Electric powerCBDAEElectric power is a most convenient ， clean， safe， and useful form of energy which supplies the major portion of energy needs of a modem society At the present time (1)A. its growth rateB. its unavailabilityC. the lack of electricity (a blackout)D. social disorder, and even national tragedyE. high electric power consumption per capitaPassage 18 Copyright piracyBDAECThere are numerous examples of what has become known as copyright piracy. The American chemical giant Du Pont, for example, recently introduced into one Asian country its famous Londax herbicide, which kills weeds in rice fields. The company invested millions of dollars in (1)A. new chemicalsB. the research and developmentC. physical propertyD. the fake and real itemsE. the intellectual propertyPassage 19 Electrical energyDEBACElectrical energy is the presence and flow of an electric charge. The energy portion of electricity is found in a variety of phenomena such as (1)A. Alternating currentB. electrical energyC. Electrical potentialD. static electricityE. electrical chargePassage 20 Solar energyADBCEMany people think of alternative solar energy as a new technology, but humans have been using this process to heat homes and baths for thousands of years.A. sustainableB. inefficientC. the collected energy is used to heat a fluidD. the best known is photovoltaic cellsE. efficientPassage 21 Electrical energy conservationCDEABElectrical energy conservation refers to the process of reducing energy used through various means. Many of these methods for (1)A. turning the thermostat up in the summer and down in the winterB. looking for other opportunities for electrical energy conservation in the homeC. reducing energy consumption can be undertaken at homeD. making use of alternative clean energy sources E. contributing to climate changePassage 1CDBEANowadays, scientists are working hard to make deserts into useful land again. They make efforts to bring water to the desert( C ). Unluckily, more and more land is becoming deserts. This is because people are doing bad things to the earth.A. There is still a long way to go for scientists to turn the desert into good land.B. They are very important to dry placesC. so that people can live and grow food thereD. even though these places don t have much rain E. Besides, they won tlet the wind blow the dirt away.Passage 2CBEADTemperature, pressure, specific volume, enthalpy and entropy are the most commonly used ( C ) in the thermodynamics.A. heat transferB the rise in temperatureC parameters of the mediumD internal energyE external forcesPassage 1EABCD( E ) Here are three important rules( A )Reduce. ( B ) Big cities always consume a lot of water in daily life. To save water, people in some families may first use the same water to wash clothes and then to flush the toilet.A. Their key words all begin with the 1etter“R”.B. If you want to reduce waste. you must use thingswisely.C. Youmust alwaysthinkof reusing thingsbeforethrowing them out.D. The metal stuff can be made into new coke cans.E. Its important to protect our environment.Passage 2BCADEAccordingto the mode of energy conversion, powerplants can be classified into fossil-fired,hydraulic, ( B ),geothermal, tide power plants, and so on.A. supplies steam to the userB. nuclear, wind, solarC. supplies power to usersD. Fuel supply and ash disposalE. newly scheduled power plantPassage 1BDACEThemostimportantpumps inapowerplantarefeed-water pumps and condensate pumps, etc.The role of feed-water pump in a power plant is that ( B )from de-aerator water storage tank toA. three sets of motor-driven pumps are acceptableB. it must be located at 0.5m-0.8m below the hot-wellC. two of them are fur normal operationD. Motor frequency conversion speed regulation ；E. it pressurizes and transports the higher temperaturede-aerated waterPassage 2CEBADAutomatic regulation of boiler dram water level meansthat by the feed water automatic regulator, ( C ).A. a small quantity of water spraying can be adopted.B. The superheater outlet steam temperature is regulatedby the injection of desuperheating water.C. the dram level is kept within a set rangeD. by the water sprayingE. It is a one element regulating system at that time