The calorific value of a fuel is 40000KJ/kg. This fuel is most likely to be:

which of the following statement is not correct about carbondioxide acting as a fire extinguisher for electrical fires?

Fires in underground coalmines usually occur due to the:

Which of the following fuels has the highest calorific value?

On a cold winter night, the person sleeping in a room with closed door and windows with a coal fire burning inside may die due to the excessive accumulation of: