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XVI. Answer the following questions using the introductory phrases.

1. What is this text about ?

2. How can revolving shovels be classified ?

3. What types of shovels are there ?

4. What are building (quarry, stripping) shovels used for ?

5. What are walking draglines used for ?

6. What do you know about universal shovels ?

7. What is the power plant of a shovel ?

8. What are the most widespread kinds of replaceable equipment?

9. What are most building shovels powered by?

10. How are revolving shovels subdivided?

XVII. Translate the following sentences into English.

1. Одноковшовые экскаваторы копают грунт, стоя на одном месте.

2. Карьерные экскаваторы используются для выкапывания минерального сырья из карьеров.

3. Универсальные экскаваторы предназначаются для работы с различными видами сменного рабочего оборудования.

4. Полууниверсальные экскаваторы оборудуют прямой лопатой, драглайном или краном.

5. Наиболее широко используемые виды сменного рабочего оборудования – это прямая и обратная лопаты и драглайн.

6. В зависимости от емкости ковша и назначения вращающиеся одноковшовые экскаваторы подразделяются на различные группы.

7. Вращающиеся одноковшовые экскаваторы очень широко используются во всех отраслях строительства.

XVIII. Read and retell the following texts using the introductory phrases.

A Hydraulic Crawler Shovels

There are hydraulic crawler shovels which have a telescopic boom. These hydraulic crawler shovels are designed for small-scale stripping jobs in pits, for leveling out small slopes, etc. Such shovels are powered by a 16 horse-power diesel engine. They have the 0.15 cubic meters bucket. The machine weighs 4.5 tons. The bucket can turn together with the table, change its position in a vertical plane together with the boom.

Cutter Excavator.

A cutter excavator (землеройно-фрезерная машина) is a highly efficient, self-propelled, track-laying machine of continuous action designed for large-scale excavation on irrigation and hydraulic works, where no heavy rock inclusions occur in soils. The machine employs a diesel-electric drive. The operating principle of the machine is based on soil falling, which is the most economical method of excavation.

The working attachment is represented by a cutter (фреза) mounted in front. The cutting blades and transporting threads (витки) of the screw conveyer are fastened on a horizontal shaft, driven from two electric motors through the medium of side reduction gears (через боковые редукторы). Soil falling due to the action of the blades is fed by the screw conveyors to the belt of the receiving conveyor and is further carried via a hopper on dumping fan conveyor which dumps the soil to a spoil bank. The main mechanisms of the machine are driven by individual electric motors supplied from a diesel-generator set.

Control of the main mechanisms of the cutter excavator is effected from the operator`s cabin.

XIX. Learn the following dialogue.

Situation: You have just looked through a technical journal in English and came across an interesting article about revolving shovels. You are going to discuss it with your friend.

A. Hello! Haven`t seen you for ages! You see, I have just read an information about revolving shovels.

B. Oh, it`s interesting. What have you learned about them ?

A. There are revolving shovels and ditchers.

B. And what is the difference between them, I wonder?

A. Can`t you guess? A revolving shovel digs soil while standing at one place …

B. Oh, I see! And the ditcher moves continuously.

A. Right you are! It should be said that these machines are widely used in all branches of construction.

B. Is it really so?

A. Yes, they are employed to drain and irrigate land, extract mineral resources, in mining for baring operations.

B .Oh, they are really most widely used in construction.

УРОК 11 LESSON ELEVEN

Фонетика: Чтение буквы «U» в закрытом слоге, буквосочетания «SION»

перед гласной, окончания «ED» в глаголах.

Грамматика: Причастие настоящего времени в функции обстоятельства.

Complex Subject.Сложное подлежащее.

Complex Object. Сложное дополнение (Повторение)

Тема: Многоковшовые экскаваторы. Multi-bucket Excavators.

E X E R C I S E S

I. Read the following words and translate them.

Excavators, types, operations, normally, classified, design, rotary, mechanical, lifted, system, cables, opposite, vertical.

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