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Use of Fire Extinguishers : We know that one type of fire extinguisher cannot serve the purpose on all kinds of fire. In this subsection you will study about the use of different types of fire extinguishers, fire buckets and fire blankets. How would you use a foam extinguisher, for instance? Would you just point it at a fire and force a jet of the extinguishing agent? Would you do the same with a water extinguisher or a carbon dioxide extinguisher?
There's no simple answer to any of these questions, but there is a technique to be learnt for each type of extinguisher. In the same way that you would use certain kinds of fire extinguisher for certain kinds of fire, you would use an appropriate technique for each kind of fire extinguisher. To do otherwise would be wasting valuable resources, probably at a time when these resources are most needed. The difference between knowing what fire extinguisher to use and how to use it, and not knowing this information could be the difference between life and death for someone. However, remember that fire extinguishers are usually suitable only for small fires.
Moving loads on a trolley : Loads on a trolley, are normally moved through pulling or pushing process. During the pulling process, the whole strain is to be taken by the back musc
A hair hygrometer This device will enable you to read the relative humidity directly without the use of tables. Procure a few human hairs about 30 cm long. Free them from gr
INTRODUCTION : In the first unit of this block you read about hazards due to electricity and gases in the science laboratories. 'The second unit deals with yet another type of com
Objectives After studying this unit, you should be able to: 1. Categorise different radiations into ionising and no ionising types, 2. Explain the effects of radiations
Useful Instruction : In the table given below, you can find references to the locations of materials related to this exercise. You are advised to go through these materials to und
Ingestion : The standard treatment for this type of poisoning is as follows: (1) Tell the casualty to spit out as much of the material as possible and then wash the mouth thoro
Systems view of life: Evolution has given rise to various types of life forms from single celled bacteria to organisms as complex as a human being. It may interest you to know
1. Contrast how a functionalist verses a conflict theorist would view the impact and effects of the media on children differently? Be sure to articulate the point of view of e
A compressed air pop-gun Use a straight piece of glass or plastic tubing of 1 or 2 cm in diameter and 15 or 20 cm in length. Make a piston by twisting some string on a pencil t
how can isolated brown dwarf passing between another star and the earth could be detected?
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