POWER SUPPLY SYSTEM
1. Напишите множественное число
Speed, telephone, passenger.
2. Напишите следующие сочетания во множественном числе
A heavy engine,
the weather condition.
3. Вставьте в предложение личную форму глагола "tо be" (am, is, are)
The railway equipment _ complex.
These young men _ my fellow- students.
4. Поставьте каждое предложение в вопросительную и отрицательную форму.
This system is electronic.
The magnets are out of order.
5. Укажите this или these
_ managers, _ shop, _ tape.
6. Напишитемножественноечисло
This pen; that master
7. Укажите have/has
These engineers _much work.
8. Вставьте личные формы глагола "to be" (am, is, are) или "to have" (have/has)
This _ our college.
The students _ on the lesson.
They _many books in the classroom.
9. Употребите стоящий в скобках глагол в Present Simple Tense
The movement of a train _ (to start) at the terminal.
10. Поставьте предложения в вопросительную и отрицательную формы
She gives me her books.
11. Раскройте скобки, употребив глагол в Past Simple Tense
The father (to repair) our TV-set.
12. Поставьте предложения в вопросительную и отрицательную форму (в Past Simple Tense)
I gave her my address.
13. Раскройте скобки, употребив Present Continuous Tense
We are (to have) dinner now.
14. Поставьте предложения в вопросительную и отрицательную форму (в Future Simple Tense)
They will meet you at the station.
15. Раскройте скобки, употребив Present Continuous Tense
We are (to have) dinner now.
16. Раскройте скобки употребив глагол в Present Simple или Present Continuous
He (to know) several languages. (Present Simple)
17. Раскройте скобки, употребив глагол в Present Perfect Tense
The teacher (to give) us much homework this week.
18. Раскройтескобки, употребивглаголв Present Perfect или Past Simple
Her sister (to clean) the window last week. (Past Simple)
19. Раскройте скобки, употребив глагол в Present, Past или Future Simple Passive
The books (to return) to the library last week.
The new film (to show) on TV tomorrow.
20. Преобразуйте предложения из действительного залог в страдательный, употребив глагол в том же времени
The teacher wrote the words on the blackboard.
21. Раскройте скобки, употребив глагол в нужном времени в соответствии с правилом согласования времён
She hoped that you (to help) her some time.
22. Специальность 1004
Электроснабжение на железнодорожном транспорте
TEXT. POWER SUPPLY SYSTEM
Nowadays technical progress including the progress in railway engineering, is unthinkable without the proper power supply system.
Till recent years, all electric energy has been generated by thermal and hydro-power stations. But the hydro-power stations are always tied to rivers. As for the thermal power plants the supplies of fuel needed for their operation are not inexhaustible. So power engineers are now in search of new sources of energy.
The great efforts of scientists and engineers have resulted in discovering atomic energy which caused a revolution in energetics.
After having been generated, the electric energy is sent to the electricity grid system of the country. It is the grid system that distributes the power to the consumers, including the electrified railways.
Both conventional and nuclear power stations generate a high voltage alternating current (a. c). The fact is that the alternating current can be more economically transmitted over long distances than the direct current (d. c.) and the higher the voltage the less energy is lost.
Although the alternating current can be used to drive trains, in many countries it is converted to the direct current because d. с. motors are simpler in construction than a. с. machines.
As is known, the conversion of a. с to d. с takes place in railway substations. The first essential of a substation is a transformer in which the electric current taken from the transmission line is lowered in voltage. Another important instrument the substation is fitted with is a rectifier which converts a. с to d. c, this one-way (i.e. direct) current being then fed to the overhead wire.
Electronics has found a wide application in railway substations, silicon rectifiers being one of the most commonly used electronic instruments. Due to electronics most substations are now operated by remote control.
24. Ответьте на вопросы, пользуясь текстом
What kind of power plants is the most perspective? (What kind of energy will soon become the main source of power supply?).
Контрольная состоит из множества заданий, но она несложная.
