Decide if the following statements true or false. Correct the false sentences

 

1. In ancient times fires could destroy the whole city because there was no professional fire service.

 

2. No punishment is imposed for accidental fire.

3. Firesetter is a person who accidentally starts the fire.

 

4. Accidental fires are caused by dangerous practices and defective equipment.

 

5. It is always easy to identify the origin and cause of any fire.

6. The training of a qualified fire investigator is very expensive and long.

 

7. The longer the fire burns the more data survive to establish the origin and the cause of it.

 

8. In case of a fire only firefighters usually arrive at the scene.

9. Too many people may damage the fire scene.

10. Only fire service is responsible for the investigation of fires.

11. Insurance companies investigate incendiary fires.

 

12. Some enforcement and fire agencies are not very eager to investigate fire because they are very busy with their primary duties.

 

 

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TEXT C

 

Translate the following text in writing.

 

USING WATER AS AN EXTINGUISHING AGENT

 

Water is the most effective agent for the extinction of fires of ordinary materials. Water is relatively inexpensive when compared to other extinguishing agent such as dry chemical, CO2, halons and foam. It is readily available in adequate quantities under most circumstances.

 

Water is usually applied with force in the form of a jet to the heart of a fire, but a spray may be preferable in some circumstances. The water has two roles: 1) in contact with the fire, it vaporizes, and this vapour displaces the oxygen; leaving the fire with insufficient combustive agent to continue, and it dies out; 2) the vaporization of water absorbs the heat; it cools the smoke, air, walls, objects in the room, etc., that could act as further fuel, and thus prevents one of the means that fires grow.

 

Although water is the most effective extinguishing agent for fires of ordinary combustible materials, there are some cases when it should not be used, because it would be either dangerous or ineffective. Water is a good conductor of electricity and if applied as a jet on live electrical apparatus or wiring it will place the fireman in danger of electric shock. When it is not possible to extinguish such fires by other means, e.g. carbon dioxide, and the cooling effect of water is necessary, the apparatus and wiring must be made electrically dead before jets are applied.

 

Water should not be used on materials which react chemically with it, e.g. water on burning magnesium or titanium is decomposed, and the hydrogen liberated aggravates the fire and may give rise to the explosion.

 

Water is generally unsuitable for fires involving oils and other inflammable liquids or fats, but in the circumstances it may be applied with caution in the form of a spray. It must be remembered that when eater comes into contact with hot oil, eruptions or foaming may occur and the area of the fire extended.

 

LISTENING

 

20. You are going to watch a video. Before watching discuss the questions with you partner:

 

1. What type of fuel do you know?

2. What is a fire extinguisher?

3. What labels are there on fire extinguishers?

 

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Watch the video “TYPES OF FIRE EXTINGUISHERS AND THEIR USES” at http://www.youtube.com/watch?v=GjSoxJF3RD4.

 

 

Watch the video again and complete the table:

 

Type of Fire	Colour Code	Burning Material
Extinguisher
Water or		– flammable solids:	________,
Water with additive	________	________, ________, ________
	black	– ______________:	________,
________ or ___		oils, ________
		– _____ and ____ equipment
		– flammable ____ and _____
Foam	________
		– ________:_____,____,____
________	blue	– ________:_____,____,____
		–
Wet chemicals	________	– _____ liquids: cooking ___ and
		___

 

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Answer the question:

 

1. What is the most universal type of fire extinguisher?

 

2. What types of extinguishers are recommended to use on electrical equipment? Why?

 

3. What precautions should be taken when using carbon dioxide fire extinguisher?

 

4. What should be remembered when using dry powder extinguishers on fires caused by electrical equipment?

 

5. What type of extinguisher is considered a must for commercial kitchens?

6. What do larger sizes of foam extinguishers have?

 

7. Where is the basic operating instruction situated?

 

8. Is the classification of fires used in the UK and the USA the same? What differences have you noticed?

 

 

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