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1. Ответьте на следующие вопросы. Полученные предложения переведите на русский язык.

  1. What is the function of the cold-water cistern?

  2. Where on the cylinder is the primary flow connected? Why is it connected there?

  3. How does heating affect cold water?

  4. What causes water to be forced out of a draw-off point?

  5. What is the most important function of the vent pipe?

  6. If a safety valve is not fitted to the system, what might be the result?

  7. Where is draw-off point is fitted to the system and why?

2. Закончите следующие предложения, которые описывают, как работает система горячего водоснабжения на низком давлении.

  1. Water in the boiler is heated with the result that …

  2. is caused by the dense cold water sinking.

  3. As a result of … water rises up the primary flow and is replaced by water descending the primary return.

  4. . thereby continuing the process of convection.

  5. The pressure at a draw-off point is due to …

  6. Hot water has a lower density than cold water. Consequently …

  7. The formation of air locks in the system is prevented by …

  8. The operation of the safety valve results in …

  9. . The system will drain

Контрольная работа 4

Вариант 4

I. Переведите предложения, обращая внимание на инфинитивные конструкции.

1. If a pipe leaving the top of the boiler allowed to circulate around the room and return to the bottom of the boiler, a rapid circulation would be evident.

2. A tall building is known to be relatively less expensive than a low building.

3. Green plants are considered to be very important, because they clean the air, reduce its contamination and so improve living conditions.

4. Because of the smog hanging over many large cities sunrise appears to come half an hour later than usual.

II. Переведите предложения, обращая внимание на зависимый и независимый причастные обороты.

1. The research being easy, the students conduct it themselves.

2. Water being heated in the boiler consequently becomes less dense than the cold water in the higher parts of the system.

3. Having been located above the air filters the evaporator was designed to absorb heat from the air.

4. When designing a heating system for a large building it is usual to ensure sufficient heating.

III. Переведите предложения, обращая внимание на условные предложения.

1. The fire will not cause much structural damage if the builders use fireproof materials.

2. If one pipe were connected to the top and the other to the bottom of a boiler, a slow circulation would be found to exist.

3. No circulation would take place provided the boiler connections were on the same level.

IV. Прочитайте тексты и выполните задания после текста.

SOLAR WATER HEATERS

Solar water heaters consist of a solar collector and a well-insulated tank. The function of the collector is to absorb solar radiation during the day and transfer heat to the water. The tank serves to store the water with little temperature loss until it is required. Various types of absorber units are found, but the relatively simple flat-plate collector is most commonly used. The collector normally consists of the following components: an absorber or heat-exchange element, insulation, cover and absorber box.

    1. Прочитайте описание следующих частей коллектора и назовите их:

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