Read and translate the text.

3. Answer the following questions:

1. How many groups of systems for automatic control do you know?

2. What systems does the first group cover?

3. What is the advantage of such systems?

4. What systems does the second group include?

5. What do the systems of the third group enable?

6. Why are the systems of the forth group becoming increasingly popular?

4. Are the following statements about the text true or false? Why?

1. The systems for automatic control can be divided into ten groups.

2. These systems are rather expensive.

3. Such systems can’t neutralize the influence of the mains voltage variation.

4. Such systems are becoming increasingly unpopular owing to the expanding application of robots.

5. The first group includes systems for control of the electrode metal melting and its transfer into the weld pool.

Complete the following sentences choosing the right word in brackets.

1. The most systems of the first group consist of diode (amplifier, rectifier, isolator).

2. The fourth group of systems covers systems of automatic (control, watching, guidance) to the weld line.

3. These systems enable fast control of current and its transition in the (heating zone, weld pool, weld electrode).

4. Control of the power source permits the (single-button, self-regulation, automatic) systems.

5. The second group includes systems for control of the (speed time, pint shape, size of weldment).

Put the following words in the correct order.

1. melting, the, metal, third, electrode, group, the, includes, control, of, systems, for,

2. systems, the, control, influence, automatic, of, the, of, the, disturbances, be, can, using, alleviated.

3. systems, control, ‘single-button’, of, power, the, permits, source, the, or, feed, wire, rate, the.

4. disturbances, the, does, self-regulation, not, process, eliminate, the, a, number, large, the, of, of.

7. Put questions to the following answers:

1. The advantage of such systems is their comparatively low cost.

2. The second group also includes systems for control of the welded pint shape.

3. Such systems are becoming increasingly popular owing to the expanding applications of robots for arc welding.

4. Control of the power source permits the ‘single-button’ system.

5. The self-regulation process does not eliminate the influence of a large number of disturbances.

8. Find the English equivalents of the following words:

торець, напруга живлення, привід, підтримувати, передача, автоматичне стеження.

Find in the text the sentences with Passive Voice.

Retell the text.

TEXT B

Дата добавления: 2015-11-16