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Paage 1 Functions of power transmiionCEADB

The function of(1)is to send power from power plants to load center or to exchange。。

A.step-down substations and connected transmiion equipment

B.power network operation

C.power transmiion

D.transmiion at high voltage

E.power networks

Paage 2 Substation misoperation and its preventingCEABD

The misopemtion that can lead to(1)mainly are：①on-load switching of isolating switch；

A.preventing the misoperation in substation

B.the closing of grounding switch with power on

C.accidents in the electrical operation of the substation

D.the persons from illegal entering the lived bay

E.the grounding wire(closing the grounding switch)with power on

Paage 3 A brief introduction on the development of supercritical boilers and their main advantagesBDEAC

In(1)such as U.S.A，Japan and European countries，the supercritical。。

A.good homogenization of distribution

B.some advanced countries

C.whole proce management is strengthened

D.great advantages oil economy and environmental protection

E.subcritical once-through boiler

Paage 4 Steam generation and useBEADC

Steam is one of man’s dependable servants More and more in the background。。

A.first generating steam

B.an electrically heated home

C.use of steam for electric power generation

D.the new generating capacity being installed

E.the fuel is uranium and the heat is supplied

Paage 5 Circuit breakerBDAEC

Circuit breakers are automatically operated high voltage(or high current)switches.。。

A· to perform any switching operation after long periods

B.to control electrical power networks

C.of the circuit breaker

D.to switch the current which can be from a few amperes

E.of the highest importance for high reliability

Paage 6 The ratio of distance to height of pumped-storage power plantBDACE

For pumped-storage power plant, generally the ratio of distance to height(l),。。

A.is most economic

B.is used to evaluate topographic condition of power plant

C.is not desirable

D.is the ratio of horizontal distance between upper and low reservoirE.is the best

Paage 7 Fuel cellsBAECD

Fuel cells are devices that when a fuel such as hydrogen or hydrogen-rich compounds and oxygen are supplied to。。

A.further development is under way

B.there is no storage capacity in a fuel cell

C.many cells are operated in series to obtain voltages

D.supply alternating current from fuel cells

E.as they are being developed there have been some applications

Paage 8 Substations pace into the Digital AgeCAEBD

Substations constitute the main part of power transmiion and distribution in a power grid.。。

A.substation automation technology has reached a certain level

B.simulation training technology for substation operation

C.composed of a large number of primary and secondary equipments

D.a full-digital automation system

E.all of which has become an indisputable fact

Paage 9 Overcoming the Problem of WasteCADEB

Many large cities are anything but beautiful Streets are littered with trash.In this trash, however,(1)。。

A.there is no time to be lost

B.building beautiful cities out of garbage is only a dream

C.there is still something that can be useful

D.it can be put to use again

E.more and more machines are designed for this purpose

Paage 10 HibernationEBDAC

The weather in winter.Call be very cold.Some animals sleep during the winter,。。

A.So they don’t need to worry about bad weather and other dangerous animals

B.We call this kind of sleep in wintertime “hibernation’’

C.As it gets warmer and warmer in spring，the sleeping animals begin to wake up and look around for food

D.Hibernating animals don’t need to eat much because they don’t moveE.They can sleep for a long time

Paage 11 SatellitesBDACE

The body that is neatest to the Earth is the moon.(1).This satellite is。。

A.The bigger and heavier a body is, the greater is its force of gravity

B.It circles the Earth and is therefore know as a satellite of the Earth

C.To get out into space we have to overcome the Earth’s gravitational pull

D.A satellite stays in orbit because the planet gravitational force keeps pulling it into a circle

E.Artificial satellite can be used for various purposes

Paage 12 Secondary equipment in power systemBDEAC

The secondary equipments in power system are(1), measuring，regulating。。

A.5A rated current of the current transformer secondary winding

B.the equipments that provide protecting，monitoring

C.50V rated voltage of PT secondary side

D.the equipments that send the command signals

E.current values in secondary system

Paage 13 Switching overvoltageEABCD

A sudden change in the configuration of transmiion network caused(1)or by the appearance of a fault can。。

A.determine the insulation requirements of transmiion lines

B.the cost of transmiion and 1ine failure rate

C.at both opening and closing of circuit breakers

D.by means of circuit breaker closing resistor in 500kV system

E.by the operation of a circuit breaker

Paage 14 Transmiion line and distribution lineADBCE

The high voltage power line through which power is(1)is called power transmiion line.。。

A.transmitted from power plant’s step-up substation to step-down substation

B.the overhead transmiion line

C.lightning frequently happening and heavy raining

D.the power line that transmits the power from step-down substation

E.1arge spanning line section

Paage 15 Transformer insulationCEABD

The insulation of a transformer can be categorized into internal insulation and external insulation.。。

A.The main insulation materials inside transformer are transformer oil

B.The degradation of insulating properties of insulation materials under long period of influence

C.The internal insulation refers to the insulation of various parts inside the oil tank

D．If the winding temperature is within the scope of 80～140 oC

E.The main insulation refers to the insulation between windings and grounding parts and the insulation between windings

Paage 16 The electricity marketBDAEC

The aim of introducing market mechanism is to bring various parties more。。

A.to agree on the price and quantity to be traded

B.a wholesale market

C.to register as a market customer

D.a retail market

E.to choose electricity suppliers

Paage 17 Electric powerCBDAE

Electric power is a most convenient，clean，safe，and useful form of energy which

supplies。。

A.its growth rate

B.its unavailability

C.the lack of electricity(a blackout)

D.social disorder, and even national tragedy

E.high electric power consumption per capita

Paage 18 Copyright piracyBDAEC

There are numerous examples of what has become known as copyright piracy.。。

A.new chemicals

B.the research and development

C.physical property

D.the fake and real items

E.the intellectual property

Paage 19 Electrical energyDEBAC

Electrical energy is the presence and flow of an electric charge.。。

A.Alternating current

B.electrical energy

C.Electrical potential

D.static electricity

E.electrical charge

Paage 20 Solar energyADBCE

Many people think of alternative solar energy as a new technology,。。

A.sustainable

B.inefficient

C.the collected energy is used to heat a fluid

D.the best known is photovoltaic cells

E.efficient

Paage 21 Electrical energy conservationCDEAB

Electrical energy conservation refers to the proce of reducing energy used through various means.。。

A.turning the thermostat up in the summer and down in the winter

B.looking for other opportunities for electrical energy conservation in the home

C.reducing energy consumption can be undertaken at home

D.making use of alternative clean energy sources

E.contributing to climate change