81. Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel)?
82. Use of excess of combustion air in the combustion of fuels results in
83. High excess air in combustion of fuels results in
84. Combustion of pulverised fuel
85. The internal energy of the combustion products is __________ compared to that of reactants.
86. For every 10% increase in the excess air; the fuel consumption increases by __________ percent.
87. Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.
88. Fixed carbon in coal is defined as
89. The most matured coal out of the following is
90. Yield of charcoal in high temperature carbonisation of wood is about __________ percent.
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