14. Find correct Russian translation of English terms. Compose sentences with them on the topic of the text

modern

human

technology

to manufacture

comfort

residence

tendency

assembly

associate

special

natural

удобство

скопление (людей)

особый

современный

человеческий

стремление

связывать

естественный

техника

производить

жилище

15. Mark which paragraphs these titles belong to. Place them in order according to the text

1. Gas supply as an important part of modern amenities.

2. Ventilation for industrial buildings.

3. The importance of air-conditioning for human comfort.

4. The basic parts of equipment for an all-year air-conditioning system.

16. Finish these sentences

1. Air conditioning implies...

a) ...rapid loss of heat, b) ...the transmission of energy in the form of waves, c) ...provision for the expansion of the water, d) ...the control of temperature, humidity, purity and motion of the air.

2. The purpose of ventilation is...

a) ...to produce a desired temperature for maintaining comfort, b) ...to supply heat for cooking and space heating, c) ...to maintain air purity at an extremely high level, d) ...to carry away excess heat and odors.

3. The basic pieces of air-conditioning equipment are...

a) ...stokers, coal furnaces and boilers, b) ...filters, preheat coils, humidifiers, reheat coils, fans and controls, c) ...boilers and a system of pipes, d) ...systems of steel and copper pipes.

17. Divide these sentences into three groups

A. Air Conditioning. В. Gas Supply. C. Ventilation.

1. Gas supply has come to be very widely used. 2. In industrial buildings three types of ventilation are in use so as to control dangerous gases and dusts. 3. In buildings such as homes, the leakage of air through cracks in doors and windows is usually sufficient. 4. As for the purpose air-conditioning system may be described as winter, summer and all-year. 5. The main utilization of natural gas is as a clean, convenient, economical source of heat. 6. Natural gas supply is used also as a heat source in commercial establishments. 7. Certain industrial process requirements and human comfort are the two major factors to be considered when designing air-conditioning system. 8. Air conditioning is meant for the control of temperature, humidity, purity and motion of the air in an enclosure. 9. The main purpose of ventilation is to carry away excess heat and odors.

Tasks before reading:

18. Change these words into another part of speech

cycle, atmosphere, vary, proportion, phenomenon, reservoir, depression, classify, gravel, sanitary, domestic, standard, modern, location, protection, mineral, resources, flora, community.

19. Read the text. Mark which paragraphs devote to the title of the text Water Supply

(1) Water is an important part of nature which surrounds us and of those natural conditions we are changing constantly and ever more intensively: the flora, the soil, the mountains, mineral resources, the deserts, the marshes, the steppes and the taiga.

(2) Water passes through a very interesting natural cycle. The atmosphere which surrounds the earth's surface contains water which varies in amount in direct proportion to the temperature of its gases. Water is also evaporated into atmosphere. Atmosphere which has become saturated with water precipitates its moisture when the temperature lowers. This phenomenon is termed rainfall. The moisture falls to the earth and finds its way into a number of reservoirs provided by nature.

(3) Vast depressions in the earth are filled with water through the medium of natural water sources such as rivers, lakes, etc. over the earth's surface. These bodies of water are classified as inland lakes and are excellent sources of water.

4. Sometimes the rainfall finds its way into the soil and forms water bodies at various levels because of the impervious nature of the under soil. Often a water body deep in the soil consists of a sand or gravel stratum which connects or empties into the basin of an inland lake and provides a splendid source of water supply through the medium of a drilled well.

5. Man uses water for domestic and sanitary purposes and returns it to the source through sewage disposal system. Industry likewise replaces water diverted to its use. Hence the cycle is completed but it is of prime importance that the supply be protected against pollution, for if it fouls no one can predict how disastrous may be the results.

(6) An adequate supply of pure, wholesome and palatable water is essential to the maintenance of high standards of health and to provide the convenience modern society demands. In some localities water is available in unlimited quantities and converting it to use is not a difficult problem. This is especially true of towns situated on large inland lakes or rivers. On the other hand there are cities where geographical location requires elaborate systems of water supply, and to provide a satisfactory supply of water in these localities becomes a large engineering task.

(7) The importance of a sufficient supply of water for do­mestic and industrial purpose has long been a deciding fac­tor in the location of cities. The earliest settlers realized this need and took advantage of natural water sources by establish­ing colonies in close proximity to them.

(8) Water may be taken from any sources of water for human consumption after it has undergone a preliminary treatment to assure its purity. As man's communities grew in population, the demand for water increased and the need for protection of the source of water supply against the possi­bility of contamination became evident. Progress and civili­zation have called for elaborate and various systems and meth­ods of water treatment.