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Архитектура Аудит Военная наука Иностранные языки Медицина Металлургия Метрология Образование Политология Производство Психология Стандартизация Технологии |
Вакуумная и компрессорная техника» (летняя сессия)Стр 1 из 2Следующая ⇒
Answer the questions to the text. 1. What is the aim of vacuum drying? 2. What does vacuum drying provide? 3. What does vacuum drying prevent? 4. Whom and from what does vacuum drying protect? 5. What do new companies deal with? 7. Do new companies face any problems? 8. How do they solve their problems? 9. What types of chambers can you name? 10. Do you see the difference among the chambers?
Vocabulary Practice Translate, single out the suffixes of Nouns – Adjectives- Verbs, see if you can transform them for creating your own statements on vacuum drying. A chamber, type, material, damage, change, explosion, oxidation, situation, discolouration, consumption, pollution, pressure, moisture, temperature difference, drying, contaminant, potential, dusting, recovery, solvent, dryer; expenses, fume, design, exhaust, heat, loss, solving, quality, equipment, mounting, dismantling.
B independent, ideal, great, efficient, fast, low, atmospheric, additional, chemical, hazardous, dangerous, convective, air-dynamic, dielectric, available, quickly.
C allow, boil, cause, change, combine, damage, dry, eliminate, expose, lower, minimize, occur, recover, reduce, release, remove, result in, save.
Lexical & Grammar Aspect Choose the right word . 1.Vacuum drying is ideal … materials that would be damaged or changed if exposed to high temperatures a) from b) of c) for 2. Drying under reduced pressure provides a greater temperature … between the heating medium and product a) different b) difference c) differential 3. Drying at lower temperatures reduces energy… . a) consumption b) crisis c) sources 4. The potential for explosions is reduced because of the lower… . a) prices b) temperatures c) requirements 5. Different … and chamber types are used. a) specialists b) engineers c) methods
Insert the right words. a) moisture b) solvents c) reduces d) appear e) ideal f) high quality g) provide h) chambers
1. Vacuum drying is … for materials that would be damaged or changed. 2. The vacuum removes … while preventing the oxidation or explosions. 3. Drying at lower temperatures … energy consumption. 4. The dryers' closed-system design allows costly … to be recovered. 5. At present there … new companies dealing with food and wood processing. 6. These companies face the problem of fast and … drying. 7. Convective … have a number of drawbacks. 8. They … high-quality drying within a short period of time. Make the words partnerships. 1. Vacuum drying is ideal a) designed with two independent chambers 2. Drying at lower temperatures b) a number of drawbacks 3. This vacuum shelf dryer is c) protects workers 4. Vacuum drying d) where materials must be dried to very low levels of moisture 5. Convective chambers have e) reduces energy consumption
Match the words and terms with their definitions. a) dryer b) dismantling c)efficient d) hazardous e) moisture f) mounting g) product h)recovery
1. doing sth well with no waste of time, money or energy 2. a machine for drying sth 3. a thing produced during a natural, chemical or industrial process 4. putting and fixing in position 5. process of getting sth back that has been lost 6. taking apart a machine or structure 7. risky 8. drops of water that are present in a substance or liquid in the form of vapour TEXT B Vacuum Technology Developed to Control Insects in Wood. II. Skim the text and answer the questions below. 1. What do Virginia scientists hope for? 2 What is Zhangjjng Chen? 3.What are the researcher’s requirements? 4. Does the Center for Unit Load and Design support Chen’s idea? 5. What do the Center’s research data indicate? 6. Do researchers make experiments in practice? 7. What do entomologists study? TEXT C. Compressor Operation and Design Pre-reading task I. Answer the questions in Russian: I. What does stand for the word “myth” to you? 2. Have you heard or read anything about nanotechnology science? 3. Do you believe in the power of this science and its practical use? Least Developed | Other : Developing | Transitional |
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Supplementary Material Вакуумная и компрессорная техника» (летняя сессия)
Pre-reading Exercises
Read the following words, guess their meanings.
ideal situation medium product material design control protect temperature system potential method atmospheric dynamic period problem
2. Match English and Russian equivalents.
1. drying a) опасные материалы 2. moisture b) загрязнение воздуха 3. pressure c) сушильное оборудование 4. boiling point d) потеря 5. contaminant e) привести к 6. high temperature f) сталкиваться с проблемой 7. loss g) влага 8. result in h) сушка 9. air pollution i) высокая температура 10. hazardous materials g) давление 11. face the problem h) точка кипения 12. drying equipment i) загрязняющее вещество
3. Read the text carefully and translate it into Russian.
TEXT А. Vacuum Drying Equipment & Benefits Vacuum drying is ideal for materials that would be damaged or changed if exposed to high temperatures. The vacuum removes moisture while preventing the oxidation or explosions that can occur when certain materials combine with air. Vacuum drying is also ideal in situations where a solvent must be recovered or where materials must be dried to very low levels of moisture. Vacuum drying saves time. Unlike atmospheric drying, drying under reduced pressure lowers the boiling point and provides a greater temperature difference between the heating medium and product. This results in faster drying and more efficient heat recovery. Vacuum drying saves money. Drying at lower temperatures reduces energy consumption. The dryers' closed-system design allows costly solvents to be recovered, eliminates expenses for additional air pollution control or exhaust systems, and minimizes product loss caused by atmospheric contaminants, dusting, oxidation, discolouration, and chemical change. Vacuum drying protects workers. Since drying occurs in a closed system, hazardous materials and fumes are not released into the air. The potential for explosions is reduced because of the lower temperatures and the lack of dust and air in the dryer.
Drying equipment. At present there appear new companies dealing with food and wood processing. These companies face the problem of fast and high quality drying of food and wood. For solving the problem different methods (techniques) and chamber types, such as convective, microwave, air-dynamic, dielectric and vacuum drying chambers are used. Convective chambers have a number of drawbacks - long-drying time, high power consumption and low quality. Vacuum drying chambers have more prospects. In other words they are better because they provide high-quality drying within a short period of time. Besides, they have available price. Moreover, their mounting and dismantling can be done quickly. Notes: shelf dryer – стеллажная сушилка; chamber – камера, convective – конвективный; mounting – установка, монтаж; dismantling – демонтаж, разборка; solvent – растворитель; heat recovery – регенерация тепла
Comprehension Check 4. Decide whether these statements are true or false according to the text. 1. Vacuum drying is ideal for materials that would be damaged or changed if exposed to high temperatures. 2. Vacuum drying saves timer. 3. Drying at higher temperatures reduces energy consumption. 4. Vacuum drying protects engineers. 5. New companies face the problem of fast and high quality drying of food & wood. 6. Convective chambers have a number of disadvantages. 7. Vacuum drying chambers are more beneficial. 8. Convective chambers have available price.
5. Complete the sentences . 1. The vacuum removes moisture while… 2. This results in faster drying and… 3. Drying at lower temperatures reduces… 4. Since drying occurs in a closed system, hazardous materials and… 5. At present there appear new companies dealing with food and… 6. Convective chambers have… 7. Vacuum drying chambers have… 8. Moreover, their mounting and dismantling… |
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This vacuum shelf dryer is designed with two independent chambers for drying two types of materials at the same time .