Complete the text, using the words in the box

damage measures overload bearings lubricated operates insulation conditions removed protection Conductors

Even if electrical equipment(1) ____________ reliably, it is necessary to give it frequent inspections, to keep it cleaned,(2) ___________ and repaired. Undue heating, vibrations, sparking should be immediately(3)___________.

Heating may be due to (4) _________or to a short circuit between turns, lack of oil in (5) __________. Vibration may be due to improper foundation, unbalance in the moving parts of the machine.

(6)_____________ may get heated because of overload or by reason of damage of the (7) __________ of the conductor.

An electrical machine operates reliably under certain (8) __________: temperature and access of surrounding air, need for (9) __________against dirt, duration of load, etc.

Rotating machines should be placed on solid foundations.

Conductors should be protected against mechanical (10)_________.

All (11) __________ of safety precaution must be undertaken.

Work in pairs. Ask each other as many questions as possible to discuss the reliability and operability of the electrical equipment, using the text above (Ex.3).

7. Find the following equivalents in the text given in (Ex.3).

электрическое оборудование, работает надежно, частый осмотр, короткое замыкание, отсутствие масла в подшипниках, может возникнуть из-за перегрузки, непрочное основание, движущиеся детали машины, изоляция проводника, требует определенных условий, свобода доступа воздуха, защита от грязи, пыли.

8. Answer the questions:

1) How does the electrical equipment operate? 2) Do they have to keep the equipment well cleaned, lubricated and repaired? 3) What problems should be immediately removed if the electrical equipment is on operation? 4) When does heating occur? 5) What is the reason of vibration? 6) Why may the conductors be heated? 7) What conditions does the electrical machine require? 8) What machines should be placed on a solid foundation? 9) What may happen if the instruction is broken?

9. Decide whether the sentences below are true or false, and correct the false sentences:

1. The electrical equipment operates unreliably.

2. Heating may be due to overload or by reason of damage between turns.

3. Conductors may be heated because of lack of oil in bearings.

4. The electrical equipment requires certain conditions for reliable operation.

5. Not all measures of safety precautions should be taken.

10. Translate sentences from Russian into English:

1. Надежность – необходимое требование для работы с электрическим оборудованием.

2. Однако оно требует выполнения мер по технике безопасности.

3. Чрезмерное нагревание оборудования может привести к короткому замыканию.

4. Нагревание может происходить из-за отсутствия масла в подшипниках.

5. Проводники могут нагреться из-за повреждения изоляции.