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4. Answer the questions by using the suggested words in brackets.

1. What do heating, ventilation and air -conditioning provider for?

A required atmospheric environment, heat supply, a desired tem­perature within a space, air supply and removal, humidity, purity and air motion).

2. What modern equipment is installed in residential and industrial buildings?

(Blowers, economizer, packaged units, units, field - erected boilers, multizone deviser, preheat and cooling coils.)

3. What basic aspects is great attention given to in HPAC scientific research?

(noise level, power consumption, the flow of gases, combustion chemistry, toxic vapours etc.)

5 .Read the sentences and answer the questions.

1 .Heating and ventilation and air -conditioning are three branches of engineering.

What are the three branches of engineering?

2. Air -conditioning maintains comfort with respect to humidity, pu­rity and air motion.

Does heating maintain comfort with respect to humidity, purity and air motion?

3. Basic flame characteristics of fans and motors are some of the as­pects studied in heat research.

What is studied in heat research?

6. Complete the sentences using the words given below:

  1. Heating is concerned with___________________

  2. Ventilation deal with___________________

  3. Air - conditioning is concerned with________________________

  4. HPAC engineering is of great significance for industrial purposes as well as for_________________________

  5. Big industrial complexes produce HPAC equipment and increase the output of___________________________

  6. No factory, school, plant, hospital are possible without_________________

Heat supply, supply and removal of the air, humidity, purity, air mo­tion, human comfort, heating units, fans, blowers, unit air - conditioners.

7. Make the sentences larger. Add the necessary words, phrases from the active vocabulary so as to enlarge the information.

  1. Heating, piping and air - conditioning are three branches of engineering.

  1. Different equipment is installed.

  1. Tests and experiments are carried out in HPAC engineering.

  2. Some scientific aspects are studied in heat research.

8. Read the text and give its summary using the suggested words and expressions. The text.

For many years the development of heating, ventilation and air-conditioning as three branches of engineering which are closely connected, was given a major share of attention to. They are connected with providing a required atmospheric environment within a space, heating with respect to heat supply to produce a desired temperature for maintaining comfort, health or efficiency comfort, ventilation with regard to supply and removal of the air; air-conditioning implies the control of temperature, humidity, purity, motion of the air in an enclosure.

WORDS TO BE USED.

Three branches of engineering, to give a major share of attention, to be concerned with supply, to produce a desired temperature, supply and removal of the air, to control temperature, humidity, purity, motion of the air.