Fuels and Combustion With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases. All of these Hydrogen Unsaturated hydrocarbons Methane All of these Hydrogen Unsaturated hydrocarbons Methane 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 Low None of these High Very high, if the fuel is of low calorific value Low None of these High Very high, if the fuel is of low calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Gross and net calorific value of a fuel will be the same If its ash content is zero Ifits carbon content is very low Under no circumstances If its hydrogen/hydrogen compound content is zero If its ash content is zero Ifits carbon content is very low Under no circumstances If its hydrogen/hydrogen compound content is zero ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal Facilitates combustion with lower excess air Provides better control of furnace temperature Provides higher thermal efficiency & flame temperature All of these Facilitates combustion with lower excess air Provides better control of furnace temperature Provides higher thermal efficiency & flame temperature All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal is most disadvantageous during Its pulverisation (as it requires more power) None of these Combustion of fire slacks on the grates Handling (e.g. when emptying wagons) Its pulverisation (as it requires more power) None of these Combustion of fire slacks on the grates Handling (e.g. when emptying wagons) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.) GCV at constant volume NCV at constant volume GCV at constant pressure NCV at constant pressure GCV at constant volume NCV at constant volume GCV at constant pressure NCV at constant pressure ANSWER DOWNLOAD EXAMIANS APP
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