Задания к тексту Electric power systems (1, 2)

     Exercise 1

     Ответьте на вопросы:

  1. Can we state that the production and transmission of energy in the form of electricity is an important economic advantage?
  2. Do electric power systems make possible the utilization of power at a distance from the source?
  3. Why alternating current (AC) is generally used in modern power systems?
  4. By means of what equipment the current is easily converted to higher or lower voltages?
  5. Does an electric power system consist of six main elements? Name them.
  6. Are transformers used to raise the generated power to the high voltages used on the transmission lines?
  7. What does the central station of a power system consist of?
  8. Why do we call a water or steam turbine as a prime mover?
  9. Was most of the world's electric power in the early 1990s generated in steam plants?
  10. What are the lines of high-voltage transmission system usually composed of?
  11. How can the distance between towers be increased?
  12. What are generally used for lower voltage sub transmission and distribution lines?
  13. In cities and other areas where open lines create a hazard, insulated underground cables are used for distribution.
  14. Where and why insulated underground cables are used for distribution?
  15. How can you explain the fact that any electric-distribution system involves a large amount of supplementary equipment?
  16. Does the system include devices designed to regulate the voltage?
  17. What kind of equipment is used for protection of generators, transformers, and the transmission lines?
  18. What do electric power systems include?

 

     Exercise 2

     Найдите с тексте английские эквиваленты следующих слов и выражений:

     Производство и передача электроэнергии;  стоимость;  единица энергии;  источник;  современные энергетические системы;  трансформатор;  шесть основных элементов;  электрическая станция;  передающие линии;  подстанция;  понижать;  повышать;   оборудование потребителя;  поломка;  уровень распределения;  электрический генератор; медные провода;  алюминий;  керамические изоляторы;  деревянные столбы;  регулировать напряжение;  коэффициент мощности.