5. Найдите соответствующие ответы на вопросы и напишите их в той последовательности, в которой заданы вопросы:
Вопросы
1. What elements do ferrous metals consist of?
2. What is carbon steel?
3. What are alloy steels?
4. What are the most important properties of steel?
5. In what branches of industry are steels used?
Ответы
a. Steels in which in addition to carbon an alloying element is present.
b. In machine-building, automobile industry, etc.
c. Of iron combined with carbon, silicon and other elements.
d. It contains only iron and carbon.
e. Strength, ductility and machinability.
6. Закончите предложения, выбрав соответствующий вариант окончания:
1. Alloys consist of... a) steel and cast iron;
b) iron and stainless steel;
c) simple metal and some other element.
2. Carbon steel contains....
3. Alloy steels include....
a) steel and cast iron;
b) iron, carbon, an alloying element;
c) only iron and carbon.
4. The most important properties of steel are …
a) electrical conductivity, resistance to wear, magnetic properties;
b) strength, ductility, machinability.
Контрольная работа Вариант 3
I. Найдите в правой колонке русские эквиваленты английских слов и словосочетаний:
1. luster а. окружающая среда
2. property b. защищать от
3. quantity с. подвергаться
4. conductivity d. плохой проводник
5. solid state e. количество
6. brittle f. блеск
7. undergo g. сплав
8. to protect from h. свойство
9. environment i. проводимость
10. alloy j. твердое состояние
11. poor conductor k. хрупкий
12. distinction l. прочность
13. strength m. жесткость
14. hardness n. различие
2. Переведите на русский язык встречающиеся в тексте интернациональные слова:
metal, metallic, electricity, electric, fact, group, rocket, construction, element, material, corrosion, chemical, electromechanical, product, steel, organic, barrier, industry.
3. Прочтите текст и выполните следующие за ним упражнения:
METALS AND NONMETALS
1. There are some distinctions between metals and nonmetals. Metals are distinguished from nonmetals by their high conductivity for heat and electricity, by metallic luster and by their resistance to electric current. Their use in industry is explained not only by those properties, but also by the fact that their properties, such as strength and hardness, can be greatly improved by alloying them with other metals.
2. There are several important groups of metals and alloys. The common metals such as iron, copper, zinc. etc. are produced in great quantities.
3. The so-called precious metals include silver, gold, platinum and palladium. The light metals are aluminium, beryllium and titanium. They are important in aircraft and rocket construction.
4. Many elements are classified as semimetals (bismuth, for example) because they have much poorer conductivity than common metals.
5. Nonmetals (carbon, silicon, sulphur) in the solid state are usually brittle materials without metallic luster and are usually poor conductors of electricity. Nonmetals show greater variety of chemical properties than common metals do.
6. Metals can undergo corrosion, changing in this case their chemical and electromechanical properties. In order to protect metals from corrosion the products made of metals and steel are coated by some films (coatings). Organic coatings protect metals and steel from corrosion by forming a corrosion-resistant barrier between metal or steel and the corrosive environment.
Переведите на русский язык письменно абзацы 1,2 и 5.
5. Найдите соответствующие ответы на вопросы и напишите их в той последовательности, в которой заданы вопросы:
Вопросы
1. By what properties are metals distinguished from nonmetals?
2. What common metals are produced in great quantities?
3. What metals are called light?
4. What properties do nonmetals have?
5. What is done to protect metals from corrosion?
Ответы
a. Iron, copper and zinc.
b. They are usually poor conductors of heat and electricity.
с They are coated by some organic coatings.
d. High conductivity for heat and electricity.
e. Aluminium, beryllium and titanium.
6. Закончите предложения, выбрав соответствующий вариант окончания:
There are some different groups of metals, such as:
1. light metals:....
2. common metals:....
3. precious metals:....
a) iron, copper, zinc.
b) silver, gold, platinum.
c) aluminium, beryllium,
titanium.
4. Nonmetals are....
a) carbon, silicon, sulphur.
b) aluminium, beryllium, titanium.
Контрольная работа Вариант 4
1. Найдите в правой колонке русские эквиваленты английских слов и словосочетаний:
1. non-ferrous metal а. зубчатая передача
2. turning mill b. многодисковая фрикционная муфта
3. roughing operations с. скорость движения стола
4. finishing operations d. черновая обточка
5. turret head e. токарный станок
6. side head f. высокая жесткость
7. facing g. чистовая обточка
8. drilling h. торцевое точение
9. high rigidity i. револьверная головка
10. gearbox j. боковой суппорт
11. multidisk friction clutch k. сверление
12. work feed 1. клинообразный ремень
13. table speed m. цветные металлы (не железистые)
14. cross-rail n. поперечина (траверса)
15. V-belt о. подача заготовки
2. Переведите на русский язык встречающиеся в тексте интернациональные слова:
universal, vertical, operation, metal, steel, horizontal, cylinder, machine, electric, motor, start.
3.Прочтите текст и выполните следующие за ним упражнения:
VERTICAL TURNING MILLS
1. The single-column vertical turning mills are universal high-speed machines. They are designed for roughing and finishing operations on parts made of steel, cast iron and non-ferrous metals.
2. The machines are provided with two heads: vertical turret head and horizontal side head. Vertical turret head travels along the horizontal ways of the cross-rail. Horizontal side head moves along the vertical ways of the column.
3. The machine performs the following operations: cylindrical turning, facing, cutting, drilling, etc.
4. High rigidity of machines and their units as well as the wide range of table speeds and work feeds allow machining at most favorable cutting speeds and work feeds.
5. Motion to the table is transmitted from the main drive electric motor by means of V-belts and gearbox.
6. For starting and stopping the table rotation the gearbox is provided with multidisk friction clutch.