Fuels and Combustion A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that 21% excess oxygen has been used for combustion 21% excess air has been used for combustion No excess air has been used for combustion Complete combustion of fuel has taken place 21% excess oxygen has been used for combustion 21% excess air has been used for combustion No excess air has been used for combustion Complete combustion of fuel has taken place ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Out of the following fuels, the difference between gross and net calorific value will be minimum in case of Coke oven gas Water gas Natural gas Blast furnace gas Coke oven gas Water gas Natural gas Blast furnace gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because It reduces its calorific value tremendously It reduces its flame temperature tremendously The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot There are chances of explosion during preheating It reduces its calorific value tremendously It reduces its flame temperature tremendously The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot There are chances of explosion during preheating ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High ash containing coke Has poor strength and abrasion resistance None of these Is desirable in producer gas manufacture Produces more slag when used in the blast furnace Has poor strength and abrasion resistance None of these Is desirable in producer gas manufacture Produces more slag when used in the blast furnace ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Bituminous coal Burns with smoky yellow flame Is generally coking Ignites less easily than anthracite Both B and C Burns with smoky yellow flame Is generally coking Ignites less easily than anthracite Both B and C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Softening temperature of coal ash is a measure of the __________ of coal. Caking tendency Clinkering tendency Coking tendency Size stability Caking tendency Clinkering tendency Coking tendency Size stability ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS