Fuels and Combustion With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases. Methane Unsaturated hydrocarbons All of these Hydrogen Methane Unsaturated hydrocarbons All of these Hydrogen 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 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 Low ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal is most disadvantageous during Handling (e.g. when emptying wagons) None of these Combustion of fire slacks on the grates Its pulverisation (as it requires more power) Handling (e.g. when emptying wagons) None of these Combustion of fire slacks on the grates Its pulverisation (as it requires more power) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Junker's calorimeter is used to determine the calorific value of None of these Gaseous fuels Pulverised coal Fuel oil None of these Gaseous fuels Pulverised coal Fuel oil ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Preheating of __________ the flame temperature. Combustion air decreases The gaseous fuel before combustion decreases Either the fuel or the air or both, increases Either the fuel or the air does not affect Combustion air decreases The gaseous fuel before combustion decreases Either the fuel or the air or both, increases Either the fuel or the air does not affect ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following accounts for maximum energy loss in a boiler? Unburnt carbon in flue gases Incomplete combustion Flue gases Ash content in the fuel Unburnt carbon in flue gases Incomplete combustion Flue gases Ash content in the fuel ANSWER DOWNLOAD EXAMIANS APP
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