Question

What is known as volatile liquids, Give two examples?
58. What do you mean by a step-up transformer?
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59. What is static electricity? Give an example?
60. Explain the fire fighting method used in class 3 fire?​

Answer 1

1) Liquid that evaporates at room temperature, or vaporizes easily.

Some examples of a volatile liquid that are commonly used include perfumes, alcohol, air freshener, acetones (such as fingernail polish remover) since they evaporate very quickly.

2) A transformer that increases the voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer.

3) Eg - walking across a carpet and touching a metal door handle and pulling your hat off and having your hair stand on end.)

A positive charge occurs when there is a shortage of electrons.

4)This method is effective on gas and liquid fuel because they must have flame to burn.

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Answer 2

Answer:

57) Liquid that evaporates at room temperature, or vaporizes easily. They have very low boiling points

ex. Acetone,Ethanol

58) A transformer that increases the voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer.

59)Electric charge that has accumulated on an object. Static electricity is often created when two objects that are not good electrical conductors are rubbed together, and electrons from one of the objects rub off onto the other.

ex.when combing one's hair or taking off a sweater.

60)Type A: Pressurized water to be used on Class A fire only. Do not use on Class B or C fires; may cause fire spread or electrical shock.

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