Open the brackets. Give the right forms of the words in bold. Translate the text in a written form

Gas compressors are used in various applications where either higher pressures or lower volumes of gas are (need).

Thus, the Toronto Zoo in Ontario, Canada and the Brookfield Zoo in Chicago, Illinois, USA try to create health environment for the inhabitants of their (impress) aquariums. To keep fish alive and healthy, correct oxygen levels must be maintained in the aquariums by (pass) compressed air through the aquarium tank to create perfect conditions. An essential (require) is the need for the compressed air to be contaminant-free.

Liquid ring compressor packages were (select) for this life support application in both zoos. The oil-free design and the scrubbing action of the compressor packages provide air of a quality that meets or exceeds the required standards.

14. Special Quiz. Read about the uses of compressors. Match the parts of the sentences making the sentences complete. Start from: Gas compressors are used … ….

1.in pressurized aircraft

2. inmany various industrial processes

3.in medicine

4. in refrigeration and air conditioner equipment

5.in pipeline transport of domestic gas

6. in rail and heavy road transport

a) to power all types of pneumatic tools

b)to provide a breathable atmosphere of higher than ambient pressure

c)to store purified gases in a small volume

d)to provide compressed air for operation of rail and road vehicle brakes

e)to move the gas from the production site to the consumer

f)to move heat from one place to another in refrigerant cycles

15. Translate from Russian into English. Use the dictionary. Some English equivalents are given for you.

Вакуумные насосы, компрессоры и системы различных марок находят широкое применение во многих областях промышленности и науки. С помощью регулярно проводимых работ по техническому уходу за вакуумными насосами, компрессорами, вентиляторами и системами можно добиться лучших рабочих параметров обору-дования. На международный рынок поставляется весь спектр запчастей, улучшающих качество работы и продлевающих срок службы вакуумных насосов и компрессоров. Это такие как

– фильтры воздушные air filters

– фильтры масляные oil filters

– графитовые лопатки graphite blades

– подшипники bearings

– уплотнительные кольца sealing rings

16. Grammar Tutorials: Parts of Speech, Word Order Scan the text about Steel carefully. Use the scattered Nouns – Verbs – Adjectives – Adverbial Modifiers to make as many correct sentences as possible.

Steel is iron that contains up to 2.14 % carbon in the form of cementite. The properties of steel vary with carbon content and also depend upon the presence of other metals and the production method. Alloy steels contain alloying elements while authentic steel is a solid solution of carbon in a form of iron and normally stable only at high temperatures but can be produced by rapid cooling. Stainless steel is a group of chromium/nickel steels, which have a high resistance to corrosion and chemical attack. Stainless steel has many uses: cutlery, equipment in chemical plants; ball bearings and many other items of machinery.

Steel:

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