IV. SPEECH PRACTICE

1. Match appropriate replies to these:

1. Can I borrow your pen? a) That's O.K.

2. Would you like a cup of tea? b) I'd love to.

3. How are you? c) I'm afraid not.

4. I'm so sorry! d) Not at all. You are welcome.

5. Thank you very much. e) Fine, thanks.

6. Have you got the right time? f) I'm just looking.

7. Can I help you? g) Here you are.

2. Use this diagram to give a brief description of domestic refrigerator's work:

compressor

expansion valve

TEST В

(TO BE DONE AFTER UNIT 12)

I. VOCABULARY

1. Continue the lists of words:

1) Modes of heat transfer: radiation,

2) Temperature scales: Celsius, ...

3) Parts of a compressor: piston, ...

2. Match the synonyms:

wet application

fluid steam

environment humid

to utilize liquid

balance to use

velocity equilibrium

pipe to make

to force line

employment rate

vapour medium

3. Give the names of the processes discriptions of which are given below:

1) The process of removing heat from vapour so that it will begin to condense.

2) The process whereby the vapour is completely liquified or condensed.

3) A combination of four operations which take place in the compressor.

4) The process of completely evaporating that portion of the cold liquid refrigerant which is delivered through the expansion valve into the evaporator.

5) The process of increasing the temperature of the vapour after it has been completely vaporized by adding heat to it or by doing work upon it.

6) A process at which heat flow from the warmer to the colder body.