Login

all combustible substance are not fuel. Why??

Fuel may be defined as the substance which has high calorific value and least ash content on burning. Many of the substance does no fulfill this criteria therefore cannot be considered as fuel. 

  • 11
View Full Answer

A combustible substance is the one which can burn. It does not necessarily mean that it would produce large amount of heat without leaving any residue. Thus all fuels are combustible but not all combustible substances are fuels.

A good fuel produces large amounts of energy and does not leave behind any undesirable substances. Also, it is cheap and is readily available.

  • 40
What are you looking for?