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Foam extinguishers : If the burning liquid is in a container the jet should be directed at the inside edge of the vessel or at a vertical surface in order to break the jet and allow the foam to build up and spread across the surface of the liquid (Figure). If this is not possible, the correct procedure is to stand well back (perhaps as far as 6 or 7 m) and to direct the jet with a gentle sweeping movement to allow the foam to drop down and form a layer on the surface of the liquid (Figure). Do not aim the jet directly into the liquid as this will drive the foam under the surface where it will be ineffective in extinguishing the fire and may spread the fire by splashing the liquid on the surroundings.
Figure: Use of foam extinguisher-I. Fig.12.4: Use of foam extinguisher-11.
State of Communication in the Past: Those of us who have experience of life in remote villages, far away from urban centres, are familiar with such features as poor roads whi
It is estimated that the temperature of the Earths core is: as hot as the surface of the sun
Chemical reactivity : The substances which react violently or produce flame on contact with water can be given suitable chemical treatment to convert them into nonreactive form be
what is the decimals for 23
true or false? water conservation efforts have been wholly inaffective
Define The Limbic System The limbic system, like you would realize, is as well referred to as the emotional brain. It is found buried within the cerebrum. This system consists
Describe the structure of the stomach. How is it modified to carry out its functions? How does It compare to that of the fetal pig?
How to Calculate the Mass of Atoms in AMU's ? To calculate the masses of atoms we need only know the numbers of the various subatomic particles within the nucleus. For our purp
Coenzyme : A molecule that binds to an enzyme and is essential for its activity, but is not permanently altered by the reaction. Many coenzymes are derived from vitami
What is the structure of the urinary bladder? The bladder is composed of four layers of tissues. The outermost serous membrane is a thin membrane lining the closed cavities of
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