Which zone of flame has highest temperature ?
Non-luminous zone.
What is global warming ?
Heating up of the earth's atmosphere due to trapping up of the infrared radiation by carbon dioxide in the atmosphere is called global warming.
Name the type of fire extinguisher used for extinguishing oil fires.
Foam type fire extinguisher.
Define calorific value of a fuel.
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its calorific value. The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg).