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Energy and Electronics (Atroshkina A.A.,etc.).doc
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Post-Text Exercises

IV. Find the word with the similar meaning according to the idea of text 4 a.

  1. fault

  2. circuit breaker

  3. to exceed

  4. cord

  5. loss

  6. step up substation

  1. to deliver

  2. owing to

  3. to protect

  4. auxiliary tructure

fuse; relay; failure; isolator.

cut-out switch; short-circuit; fossil; pile.

to convert; to expand; to deliver; to overdraw.

substation; flex; cable; support.

waste; bus; load; wire.

low voltage substation; high voltage substation; feeder; insulator.

to give; to result; to ignore; to depend on.

thus; that’s why; thanks to; therefore.

to surround; to contradict; to defend; to carry.

subsidiary device; major device; driving

mechanism; clutch.

V. Connections: match a line in a with a line in b.

A

B

indoor line

to reduce the voltage

power

overhead lines

transmitting the electricity

a common substation

to protect against

a transformer substation

protecting mechanisms

switchgear

short-circuit

storage battery

step down substation

to supply

bus

wire

substation

fuses and relays

VI. Match each paragraph with the appropriate summary:

  1. The electric line efficiency;

  2. The characteristics of indoor lines;

  3. The definition of a wire system;

  4. The underground lines;

  5. The classification of electric lines and networks; heating losses in transmission lines;

  6. Electric power systems interconnection;

  7. Common substations;

  8. The characteristics of step up and step down substations;

  9. Substations as power transmission devices.

VII. Answer the following questions.

  1. What made it possible to transmit electric energy over hundreds of kilometers?

  2. Can electric energy be reconverted into mechanical energy?

  3. Which system has no parallel branches?

  4. Into what groups are all transmitting lines classed?

  5. What components does an overhead line have?

  6. In what way can the heating losses be reduced in transmission lines?

  7. How can resistance be decreased in electric wires?

  8. When does a line become inefficient?

  9. On what characteristic does the value of a line depend?

  10. What mechanisms protect the circuit against short-circuits?

  11. What devices does an indoor line consist of?

  12. What elements do conductors include?

  13. In what areas are underground lines used?

  14. What does a substation serve for?

  15. What type of consumers does a substation feed?

  16. What parts are the power transmission lines connected to?

  17. What components does a substation comprise?

  18. What types are substations classed into?

  19. What are the advantages of a transformer substation?

VIII. Translate the parts of the sentences. Complete these senten-ces.

  1. Благодаря generators, transformers and motors as well as to other electrical equipment, it became possible…

  2. In order to уменьшить сопротивление в проводах, it is necessary…

  3. Воздушные линии электропередачи include…

  4. Энергопотери в линиях электропередачи should not…, otherwise they become…

  5. Пробки и переключатели are applied to protect the circuit against…

  6. Проводник comprises…

  7. Common substations consist of изоляторов, шин, автоматических выключателях…

  8. Подстанции с падающим напряжением decrease…, and the power is supplied to…

IX. Give a short report on the topic “Substations as power transmission devices” (Use TEXT 4 A).

Grammar Exercises (The Gerund. The Gerundial Complex. The Functions of the Gerund. See APPENDIX, GR. REF., p. 105-107)

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