1. Find in the text:

a) synonyms for the following words: big, manufacture, to move, part, design, to use, to place, with the aid of

b) antonyms for the following words: moving, difficult, rarely, exclude, downtime.

2. Find English equivalents:

оборудование	- machine, machinery, machining
характеристика, работа	- perform, performing, performance
используемый	- employ, employed, employment
зажим, крепления	- clamping, clamped, clamp
автоматически	- automatics, automatical, automation, automatically
меньше	- small, smaller, smallest
оборудовать	- equipped, equip, equipment, equipping
требование	- required, requiring, requirement

3. Make sentences out of the two parts:

Radial drills are intended	Along which the drill head travels.
Self-propelled radial drills are	Is clamped rigidly in the required position.
The arm has horizontal ways	By either electromechanical or hydraulic means.
The primary cutting motion in a radial drill	Frequently employed in bridge building.
Speeds and feeds are changed	For machining large heavy work with a great number of cutting tools.
The head	Protects the motor against overload.
Ball-type safety clutch	Is spindle rotation.

4. Translate the following in writing.

Check your knowledge of the new lexics:

1. Drill head is one of the principal units of a drilling machine.

2. In radial drills the spindle axis is made to coincide with the axis of the hole being machined.

3. Self-propelled radial drills are employed in bridge building.

4. The arm has horizontal ways along which the drill head travels.

5. Clamping and unclamping of the arm are automatically interlocked with the arm traverse along the column.

6. The base is a grey iron casting stiffened by internal ribbing.

7. The drill head is a self-contained unit combining the speed and feed gearboxes.

5. Make a brief summary of the text.

D ISCUSSION

Working in pairs role-play the following situations:

1. You are in a laboratory of drilling machines. The teacher is showing you different types of them paying attention to the peculiarities in their arrangement. Ask him questions to get more detailed information.

2. You are going to carry out research using drilling machines. Ask your teacher which one is more suitable for your work and why.

FINAL TEST

1. Choose the sentences which are true to the information of Text 1 (Выберите предложения, соответствующие информации текста 1):

A. Drilling machines are not usually used for tapping threads.

B. Drilling machines employ core drills, twist drills, countersinks and other tools.

C. Radial drills and upright drill presses are most widely used in industry.

D. The column of an upright drill pres serves as a reservoir for the cutting fluid.

E. The size of the taper of the spindle socket is one of the principal dimensions of a drilling machine.