Question (1) Complete the following sentences
1. Primary fuels may be derived .................. or ..................
[8 marks]
2. The fuel-air mixture that contains less than the stoichiometric air quantity is called ..................
while the mixture that contains more than the stoichiometric air quantity is called ..................
3. Peat is not considered as coal because it .................. and ..................
4. The main hazard of coal storage is .................. which is essentially promoted by .................. and ..................
5. Most of the heat liberated from combustion reactions is used to .................. while the
remaining part of this heat is .................. or ..................
6. Combustion of solid fuels is improved by ..................
7. The affiliation of oxidizer molecules with the fuel is provided by .................. and ..................