Which one of the following statements is correct?
1
Ultimate analysis is the determination of the percentages of fixed carbon, volatile matter, moisture and ash in fuel
2
The percentage of each constituent element in the fuel such as carbon, hydrogen, sulphur, oxygen, nitrogen, and ash, is determined by proximate analysis
3
Calorific value of solid or liquid fuel is defined as the heat evolved by the complete combustion of unit mass of fuel
4
Proximate analysis value of gaseous fuel is expressed as heat developed by the complete combustion of one cubic metre of gas at standard temperature and pressure