(The answer is: because they made it possible to use less expensive energy from a commercial power line where it is available).

14. Video

Before you watch the video, discuss the following questions in pairs:

1) Why is working with electricity dangerous for people?

2) What safety measures should electrical engineers take while working with electrical equipment?

                         ELECTRICAL SAFETY (VIDEO SCRIPT)

This video shows how to follow the correct procedures for working with electricity, so due to engineer colleagues remain safe.

Electricity can kill.

 If you work with or close to any life elements it is essential to take precautions. An electric shock occurs when you come into contact with a life element or a conductor such as water or metal which forms a link between you and an electric device. If you receive an electric shock a current of electricity spread throughout your body. A current of 500 million passing through the heart is fatal, but even low-level current can cause severe burns or lead to other dangers.

  Check your surroundings before you start work.

 Before beginning work check the potential source of electricity near your workplace and ensure that all tools are in good condition. Tools you used in an electrical installation work must be equipped with insulating handles and an economy be used within the limit of authorizes voltage or wise use the correct tools for the job. How made insulating tools are dangerous and should never be used. Finally, all wise check that any insulating material is then in good condition and not to crack or warn.

  The five safety measures: 

The following five safety measures should be wisely applied when working with electrical installations or equipment.

1. Disconnect the installation or equipment.

2. Make sure the installation cannot be switched on without your knowledge.

3. Check the installation is not live.

4. Ensure the installation is earthed and cannot shut (?) circuit.

5. Remove or isolate potential conductors of electricity. Make sure that any potential conductors of electricity are removed or insulated.

By all is following from the five safety measures in correct order, you can work safely. (http://www.youtube.com/watch?v=WNot2owIv8c )

15. Now you have watched the video, try to answer the questions:

1) Why is it necessary to take precautions while working with the electrical devices?

2) What substances are the worst electrical conductors?

3) What current can cause severe burns?

4) What should you do before beginning work with the electric devices?

5) What kind of tools should you use?

6) Name 5 safety measures that should be wisely applied when working with electrical equipment.

Think of a device or installation you’re familiar with which is automatically controlled, and describe its control and safety systems.

                                              MODULE 3

 Term 1                                    Test                                      Var.1

1. Complete the sentences using the correct form of the verbs in brackets. (Perfect Tenses) and translate them into Russian:

1) A motor cable failure (had had, has had) significant impact on production and uptime, but little impact on safety.

2) By the early 20-th century Tesla’s theoretical work (has, had) formed the basis of modern alternating current including the system of electrical distribution and the AC motor.

3) Scientists not only (have, will have) built giant thermal power plants by 2030, but also (had, will have) developed new power generation methods.

4) Thunderstorms (had /have) long stopped being a problem that scientists tried to solve.

                                                                                                   4 points

2. Ask questions to the following sentence:

Before the electricity was supplied to homes and other buildings, it had already passed through several step-down transformers.

1) When……?

2) What kind of…?

                                                                                        2 point