Fuels and Combustion The optimum percentage of excess air for combustion depends upon the __________ of the fuel. Type (solid, liquid or gaseous) Ignition temperature Sulphur content Calorific value Type (solid, liquid or gaseous) Ignition temperature Sulphur content Calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of nitrogen in combustion air does not reduce the Flame temperature Any of the above Amount of heat liberated Flue gas temperature Flame temperature Any of the above Amount of heat liberated Flue gas temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following has the highest calorific value? Peat Lignite Sub-bituminous coal Anthracite Peat Lignite Sub-bituminous coal Anthracite ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following accentuates clinker-ing trouble on furnace grate burning coal? Thick fire bed and preheated primary air All of these Low reactivity of carbonised residue containing high proportions of iron & sulphur Low forced draught and fuel bed temperature Thick fire bed and preheated primary air All of these Low reactivity of carbonised residue containing high proportions of iron & sulphur Low forced draught and fuel bed temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg. 1000 4000 8000 15000 1000 4000 8000 15000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Main constituents of purified Lurgi gas are CO, H₂ & CH₄ CO₂, O₂ & CO N₂, H₂ & CO₂ H₂, CmHn & CO₂ CO, H₂ & CH₄ CO₂, O₂ & CO N₂, H₂ & CO₂ H₂, CmHn & CO₂ ANSWER DOWNLOAD EXAMIANS APP
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