Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Fire Safety.doc
Скачиваний:
26
Добавлен:
23.11.2019
Размер:
218.62 Кб
Скачать

4. Answer the following questions.

1. What handles all incoming fire and emergency calls?

2. Who controls all the subsequent radio traffic?

3. What are the working conditions of modern firefighters?

4. What does their equipment include?

5. When does water provide an immediate cooling effect?

5. Speak about complicated working conditions of modern firemen. Text 8 water pumps and hose lines

1. Look through the text. Find and write out new words into your copybook.

2. Read the words in bold, if necessary consult a dictionary. Translate them into Russian.

3. Read and translate the text.

It was not until the twentieth century, with the arrival of the motor pump and particularly the first specialized appliances, that fire engines had enough space to stow other firefighting gear such as hose, portable pumps, hand tools and basic lighting. When the first all-enclosed fire engines were produced in 1929, bodywork styles allowed for even more stowage to accommodate the steadily growing range of firefighting and rescue equipment. Modern fire engines need to carry a large amount of supplementary gear, so the ingenious design and use of locker space on a vehicle means that every available space can be utilized.

Water remains the predominant and universal extinguishing medium used by firefighters, with supplies usually available via a street hydrant or from a nearby natural source. Pumping fire engines carry varying quantities of water to enable an immediate firefighting attack on a fire for up to ten minutes, until an alternative source can be tapped. Depending upon the scale of the blaze, the on-board water will be pumped through either a small-diameter high-pressure hose reel or a larger-diameter hose line.

The on-board tank will have to be refilled by hose from a local water supply as soon as is practical. Fire engines that operate in rural areas also carry portable pumps, which can be carried to a river, lake or pond to pump water from that point. Another way of getting water to a fire is to run a shuttle, using the on-board tanks of several pumps, to ferry water to the fire scene. This is then transferred to the tank of the pumping engine operating there.

Hose lines, which are either rolled or stowed folded ready for quick deployment, come in a variety of diameters, and most pumping engines carry about 600m/2,000ft altogether. A range of hose connectors and adapters enable different combinations of hose to be used together to maximize water usage.

Other extinguishing equipment carried on pumping fire engines includes foam compound, which when mixed with water and aerated provides copious supplies of foam that may be needed to blanket the surface of burning liquids such as petrol or oil fuel. Smaller quantities of foam are provided from portable extinguishers carried on board. If a burning liquid fire involves very large quantities of flammable liquid, as might be found in a refinery or fuel storage depot, the use of dedicated foam tender would be necessary. Such an appliance is capable of producing tens of thousands of litres of foam per minute. Dry powder and carbon dioxide extinguishers are also carried for use on fires involving electrical installations, which require smothering.

Pumping fire engines carry several ladders on the roof. Alloy ladders have replaced the traditional wooden versions, being more robust and requiring less maintenance. Various types of ladder are in use, but all have extending sections with the longest ladders reaching up to about 13m/45it. Shorter versions are available for scaling fences, walls and other obstacles, and some of these come as combination ladders that meet a number of variable purposes. Some fire engines are specialized ladder vehicles, with aerial or turntable ladders, or platforms.

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]