Fuels and Combustion Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if It is stored in tall heaps It contains large amount of volatile matter Smaller fines are stored in large quantity All of these It is stored in tall heaps It contains large amount of volatile matter Smaller fines are stored in large quantity All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion As the equilibrium moisture content of the coal increases, its Swelling number increases Calorific value increases Bulk density decreases Swelling number decreases Swelling number increases Calorific value increases Bulk density decreases Swelling number decreases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent. 75 15 to 25 35 to 45 55 to 75 75 15 to 25 35 to 45 55 to 75 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal as compared to that of lump coal Develops a low temperature flame Develops a non-luminous flame Can be done with less excess air Provides a lower rate of heat release Develops a low temperature flame Develops a non-luminous flame Can be done with less excess air Provides a lower rate of heat release ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Neither A nor B Because, it alone produces unreactive coke Both A & B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Neither A nor B Because, it alone produces unreactive coke Both A & B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Gobar gas is produced by the __________ of 'gobar' (cow dung). Fermentation Dehydration Oxidation Hydrolysis Fermentation Dehydration Oxidation Hydrolysis ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS