Fuels and Combustion Coke compared to the coal from which it has been made, contains Greater percentage of ash More carbon Less volatile matter All of these Greater percentage of ash More carbon Less volatile matter All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)? Producer gas Liquified petroleum gas Natural gas Carburetted water gas Producer gas Liquified petroleum gas Natural gas Carburetted water gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Nitrogen in coal All of these Is recovered as ammonia during its carbonisation Is present upto 1-2% Comes from protein in parent vegetable matter All of these Is recovered as ammonia during its carbonisation Is present upto 1-2% Comes from protein in parent vegetable matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Highly caking coals Produce strong coke Produce weak coke Both B and C May damage the coke oven walls during carbonisation Produce strong coke Produce weak coke Both B and C May damage the coke oven walls during carbonisation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing? High power consumption in its transportation Erosion of induced draft fan blades Ash disposal problem Excessive fly-ash discharge from the stack High power consumption in its transportation Erosion of induced draft fan blades Ash disposal problem Excessive fly-ash discharge from the stack ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be High Very high, if the fuel is of low calorific value None of these Low High Very high, if the fuel is of low calorific value None of these Low ANSWER DOWNLOAD EXAMIANS APP
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