Fuels and Combustion Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the Requirement of large volume combustion chamber Risk of explosion Incomplete combustion of coal Chances of clinker formation Requirement of large volume combustion chamber Risk of explosion Incomplete combustion of coal Chances of clinker formation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around __________ percent. 96 20 4 40 96 20 4 40 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is unsuitable fuel for producer gas manufacture? Coal having low fusion point of its ash Coke Anthracite Coal having high fusion point of its ash Coal having low fusion point of its ash Coke Anthracite Coal having high fusion point of its ash 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 Very high, if the fuel is of low calorific value None of these High Low Very high, if the fuel is of low calorific value None of these High Low ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Cannel coal Has a high volatile matter content and burns with a luminous smoky flame Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named Is non-coking All of these Has a high volatile matter content and burns with a luminous smoky flame Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named Is non-coking All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion When the coal is heated in absence of air, it is called its Gasification Carbonisation Coalification Deoxidation Gasification Carbonisation Coalification Deoxidation ANSWER DOWNLOAD EXAMIANS APP
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