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  1. Match the titles to the parts of the text:

1). Higher-production lathes:

tracer lathes, Swiss-type automatic screw machines, turret lathes, and single- and multispindle automatic lathes.

2). Four main purposes.

3). Transfer Machines.

4). Machine tool.

A

B

C

D

  1. Match the notions to their definitions:

1. Machine tool

a) lathes.

2. The most common machine-tools are

b) are designed to produce small-diame­ter parts.

3. Swiss-type automatic screw machines

c) is any of a wide variety of tools, usually large, rugged, and power driven, for cut­ting, shaping, or forming metal.

4. Transfer machines

d) provide the highest degree of auto­mation in metalworking production.

1

2

3

4

3.What statements are true or false:

1). Precision of operation of machine- tools makes it possible to produce hundreds of identical parts.

2). Parts may not be freely interchanged or substituted in assembly or repair, without hand-fitting.

3). Machine- tools are known to serve two main purposes.

4). A turret lathe is made with two turrets, one at the tailstock end of the machine and the other mounted on the cross-slide.

5). "Single-spindle automatics" are turning ma­chines whose movements are directed by gears and cams.

6). On transfer machines, hundreds of op­erations are performed and inspected not automati­cally.

1

2

3

4

5

6

4. Choose the right statement:

1). Precision of operation makes it possible to interchange or substitute parts in assembly or repair, without … .

a) oiling,

b) hand-fitting,

c) grinding.

2).. Accu­racies on small production parts may be held to … .

a) 0.0005 inch (0.0013 mm).

b) 25 cm,

c) 1 m

3). A transfer ma­chine is essentially a combination of … arranged in the required sequence.

a) computers,

b) individual machine tools,

c) spare parts.

5. Fill in the gaps.

Machine (1)____is any of a wide variety of tools, usually large, rugged, and power (2)____, for (3)____, shaping, or forming metal. (4)____ of operation makes it possible to produce hundreds of identical parts, all so much alike that they may be freely interchanged or substitute in assembly or repair, without hand-fitting.

1). A) part,b) tool,c) gear.

2). A ) driven, b) made, c) taken,

3 ). A)drawing ,b)stamping, c)cutting,

4).a)precision, b) necessity,c) obligatory.

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