Fuels and Combustion Use of pulverised coal in boiler furnace provides Better combustion High calorific value Less erosion on furnace walls Smokeless burning Better combustion High calorific value Less erosion on furnace walls Smokeless burning ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion As the equilibrium moisture content of the coal increases, its Bulk density decreases Calorific value increases Swelling number increases Swelling number decreases Bulk density decreases Calorific value increases Swelling number increases Swelling number decreases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The most matured coal out of the following is Semi-anthracite Bituminous Lignite Sub-bituminous Semi-anthracite Bituminous Lignite Sub-bituminous 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 Low forced draught and fuel bed temperature All of these Low reactivity of carbonised residue containing high proportions of iron & sulphur Thick fire bed and preheated primary air Low forced draught and fuel bed temperature All of these Low reactivity of carbonised residue containing high proportions of iron & sulphur ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Deficiency of combustion air during combustion of a gaseous fuel Lengthens the flame Causes heat loss of fuel by its partial combustion Both A & B Shortens the flame Lengthens the flame Causes heat loss of fuel by its partial combustion Both A & B Shortens the flame ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal Provides better control of furnace temperature All of these Provides higher thermal efficiency & flame temperature Facilitates combustion with lower excess air Provides better control of furnace temperature All of these Provides higher thermal efficiency & flame temperature Facilitates combustion with lower excess air ANSWER DOWNLOAD EXAMIANS APP
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