Q21 of 87 Page 106

State any four characteristic of an ideal fuel(or good fuel).

Characteristics of ideal fuel-

1) It has a high calorific value


2) It burns easily in air at a moderate rate


3) It has proper ignition temperature


4) It does not produce any harmful gases or leaves any residue after burning.


More from this chapter

All 87 →
20

Fill in the blanks with suitable words:

(a) A fuel must be heated to its……… before it starts burning.


(b)The most common supporter of combustion around us is……………..


(c)Fire produced by burning oil cannot be controlled by…………………….


(d)A liquid fuel used in homes is………


(e)The amount of heat evolved when 1kg of a fuel is burnt completely is called its…………………..


(f)The substance which vaporize during, give…………………..


(g)Burning of wood and coal causes…………….Of air.

 21

What are fuels? Name any two common fuel.

 22

Define the calorific value of a fuel.

 22

“The calorific value of LPG is 55000KJ/kg”. What does it mean?