13. Speak about:

1. Motors and Generators, similarities and differences.

2. Force on a conductor.

3. Shunt motor.

4. Compound motor.

5. Series motor.

Grammar exercises.

Придаточные предложения дополнительные.

Придаточными дополнительными (the object clause), которые присоединяются к главному предложению с помощью союзов that, if / whether, what, who, which, where, how, why.

He told us that he had seen us buying a bouquet of flowers. – Он сказал, что видел, как мы покупали букет цветов.

I do not understand what I must do now. – Я не понимаю, что я должна делать сейчас.

1. Read and translate the following sentences. Define the object clauses.

1. He asked us what we thought about it. 2. They laughed at what he said. 3. I’ll ask him to find out where they live. 4. He has just gone away saying that he will return in an hour. 5. I’m afraid that they will be late. 6. It should be noted that the technical documentation of the hydroengineering project contained 199 volumes. 7. We know who took part in the design of this type of motor. 8. We understand what gigantic experimental work was made before the adoption of the project. 9. Foreign delegations are often explained hoe the construction of the protection system was started. 10. Visitors always ask if the flood defence system will be put into operation in time. 11. I thought that these goods would be delivered by ship. 12. I was sure that these machines were produced at our plant. 13. The secretary said that all these documents had been looked through by the director. 14. I thought that you would send us the telegram as soon as the goods were received. 15. We said that we should order these machines if the price was reduced.

Unit 7. Alternators. Lesson 6.

1. Find the equivalents of following word combinations.

To amplify внутренняя поверхность

To appear across the brushes обмотка барабанного типа

Slip ring магнитное сопротивление

Drum winding скользящие контакты

Inner surface усиливать

Adjacent poles съемное кольцо

Sliding contacts появляться через щетки

Reluctance среднее напряжение на катушку

Net voltage per coil смежные полюса

2. Complete the sentences with words given in previous exercise and translate them into Russian.

1. By means of the commutator, voltage generated in the armature _____ and then appears _____.

2. The dc generator may be converted to an ac generator merely by replacing the commutator with _____.

3. The armature of the alternator, like of the dc generator, is also a _____ winding.

4. The sides of each coil lie in slots under_____.

5. Great dif­ficulty is encountered in transmitting high voltages from the ends of the armature winding across _____ between slip rings and the sta­tionary brushes.

6. The stronger teeth on the stator require slower _____ due to the increased cross section of the iron.

7. If the same armature winding as in Fig. 16 were used, the voltages generated in each conductor of a given coil would op­pose each other, and _____ would be zero.