II. Find equivalents in the text:

Широкое разнообразие дизайна, имеют преимущество, способен выдерживать высокое давление, обычные паровые котлы, небольшие установки, в начале 20-го века, быстрая генерация пара, выработанный пар собирается над, предохранительный клапан установлен для предохранения от утечки пара, легко устанавливать и управлять, в ответ на потребность, температуры намного превышающие, чтобы отопить здания и обеспечить энергией, приводит к повышению давления, барабан цилиндрической формы, по этой причине.

III. Find the odd word in each line and explain why:

1. a) heat, b) cold, c) drum, d) warm;

2. a) vessel, b) boiler, c) steam generator, d) plant;

3. a) tubes, b) watertubes, c) firetubes, d) water;

4. a) pressure, b) electricity, c) volume, d) temperature;

5. a) liquid, b) solid, c) fluid, d) water;

6. a) plant, b) equipment, c) apparatus, d) device;

7. a) vapour, b) bubbles, c) melt, d) boiling.

IV. Read and retell the story:

When silence is golden

Thomas Alva Edison was one of the greatest inventors of his time. He invented so much that it is difficult to say which of his inventions is the greatest.

In 1868 while working at an office in Boston Edison made his first patented invention – an electromagnetic device.

A story is told that he wanted to ask three thousand dollars for his invention, but he was prepared to sell it for two thousand. He went to a meeting of businessmen who were interested in his invention, but when he was asked to name the price he became very nervous and was quite unable to speak. “We shan’t pay you a big price”, said one of the businessmen, “we have already decided how much we will pay you – forty thousand dollars”.

Lesson fourteen Text: Steam power

I. Learn new words:

because of to create expansion mainly reciprocating engine former pressure to push piston to connect crank to convert movement rotary similar

благодаря создавать распространение, расширение в основном поршневая машина первый давление толкать поршень соединять кривошип, колено, ручка преобразовывать движение вращательный похожий, подобный

jet blades wheel to cause to develop high low to pump as well as necessary efficient to allow complete

струя, поток крыло, лопасть колесо причинять, приводить к развивать высокий низкий накачать, выкачать также как и необходимый эффективный позволять полный

II. Read and translate:

Steam is the principal factor in producing usable energy because of the power created by its expansion. The discovery of the steam power produced great changes in industry.

Steam power is used mainly in the generation of electricity. There are, however, many other examples of steam-operated machines. There are two main types of steam machinery: the reciprocating engine and the turbine. In the former, steam pressure pushes against a piston connected with a crank that converts the forward and backward movement into rotary motion. In the second or turbine type, the operation is similar to that of water turbine. Jets of steam under high pressure hit the blades on the turbine wheel causing rotation.

The reciprocating engine develops high power at low speed while turbine develops high power at high speed. The reciprocating engine is often used to pump great quantities of water. The turbines are generally used in steam-electric generating plants where high speed as well as great power is necessary. The reciprocating engine is from ten to thirty per cent efficient. Turbines usually are much more efficient because they allow a more complete expansion of steam than do reciprocating engines.