6. Match the terms with their definitions.

a) humidistat	c) humidity	e) moisture level
b) hygrometer	d) purify	f) blower

1) a type of hygrometer consisting of two thermometers, one of which has a dry bulb and the other a bulb that is kept moist and ventilated. The difference between the readings of the thermometers gives an indication of atmospheric humidity.

2) the state of being humid; dampness

3) a mechanical device, such as a fan, that blows

4) to free (something) of extraneous, contaminating, or debasing matter

5) a device for maintaining constant humidity

6) a device for maintaining of humidity level rate

7. Translate the following words and phrases into English using the vocabulary of the unit.

Абсолютная влажность, распылитель (пульверизатор), конденсация, достаточное вентилирование, влажность окружающей среды, точные датчики, теплосодержание, температура конденсации (точка росы), парообразующий кулер, относительная влажность, зона охвата, гигрометр, психрометр, гигростат, оптимальный уровень, водяной туман, уровень шума.

Unit 5______________________________________Conditioning

START HERE

1. Fill in the words listed below.

a) invention	c) equipment	e) applied	g) sole purpose
b) high	d) public places	f) benefits	h) simultaneous

1) Air-conditioning is defined as the ¹⁾_______ mechanical control of temperature, humidity and air motion.

2) Air conditioning is usually ²⁾_______ to the cooling effect of a system.

3) Air conditioning was not used until about 1920, and then it was used mostly in ³⁾_______ such as theatres, trains, and some department stores. This is when the general public became aware of the ⁴⁾_______ of air conditioning.

^{4) Willis Haviland Carrier had called his 5)_______ ''Apparatus for Treating Air''.}

^{5) The first use of air-conditioning for the 6)_______ of human comfort came in 1914, when Carrier designed special 7)_______ for the Charles Gates mansion (особняк) in Minneapolis, Minnesota. That first home conditioner was 20 feet long, 6 feet wide and 7 feet 8)_______!}

Answer the following questions.

• What is air-conditioning?

• What is air-conditioning applied to?

• Where was air-conditioning mostly used after 1920?

• Who invented air-conditioning?

• ^{When and where was the first use of air-conditioning for the sole purpose of human comfort?}

• ^{What was the size of the first home conditioner?}

2. Make up the texts using the sentences below. Note how certain words refer forward and back to other words in the texts.

I. 1__, 2__, 3__, 4__, 5__, 6__, 7__.

1. ^{The result was blurry (размытое) images.}

2. ^{While trying to figure out a way to solve a printing company’s humidity problem, this young engineer invented mechanical air-conditioning.}

3. ^{The Sackett-Wilhelms Lithographing and Publishing Company of Brooklyn were having difficulty with its printing jobs during the summer.}

4. ^{In 1902, Willis Haviland Carrier did for indoor climate control what Alexander Graham Bell did for communication and Henry Ford did for transportation.}

5. ^{He designed a machine that blew air over artificially cooled pipes... and the process controlled both humidity and temperature.}

6. ^{The paper it used absorbed moisture from the air and expanded, so colors printed on humid days didn’t line up with those printed on drier days.}

7. ^{Carrier theorized he could control the troublesome moisture in the printing plant by chilling the air.}

II. 1__, 2__, 3__, 4__, 5__, 6__, 7__, 8__, 9__.

1. Some of these functions are required during all modes of operation.

2. Air conditioning is not simply just the process of cooling the air.

3. It covers six different functions, defined below.

4. When the system is in the heating mode, the processes are heating, circulation, cleaning and humidifying the air.

5. The person who is to estimate an air conditioning job must have at least a working knowledge of the functions and how they affect the overall total operation of the system.

6. When the system is operating in the cooling mode, the processes involved are air circulation, air cleaning, cooling and dehumidifying the air.

7. Unless all of these functions are accomplished the system is not an air conditioning system.

8. These six functions are cooling, heating, air circulation, air cleaning, humidification and dehumidification.

9. It should be obvious that air circulation is a very important aspect of the total system operation.

ACTIVE VOCABULARY