Find the answers to the questions.

  1. Answer the following questions.
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1. What are the major parts of a generator? 2. What is the purpose of a generator? 3. In what case no electrical contact is possible? 4. Where does the change from ac generator to dc one take place? 5. When is the emf equal to zero? 6. How many electric motors and generators are there in the motor-generator sets that power large transmitters? 7. What is the ship's source of power? 8. Describe how does the generator change the motor's mechanical energy back into the electric energy? 9. What law is the action of a motor based upon? 10. What are the differences between a d.c. motor and a generator in? a) They use one electric motor to drive one or two generators.b) At the commutator.c) Unlike poles attract and like poles repel.d) They are: e) When no flux is being cut.f) To change mechanical energy into electricity? g) The differences between a dc motor and a generator are usually only in the manner of mounting the brushes and connecting the windings.h) In the boilers, burning oil changes water to steam. The steam drives a turbine, and the turbine turns the ship's generators. The emf from the generators runs the motor of the transmitter's motor-generator set-and the generator changes the motor's mechanical energy back into the electrical energy to operate the transmitter.i) Because two segments are insulated from each other? J) It is the oil in the tanks.

Read and translate the text. | Complete the sentences with given words. | Gerund constructions. | . | | Unit 4. | Brushes and brush rigging | Answer the questions. | Grammar exercises. | MECHANICAL ENERGY FROM ELECTRICITY |

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