Fuels and Combustion Weathering of coal during storage causes Decrease in its caking capacity All of these Reduction in coal size Increase in its friability Decrease in its caking capacity All of these Reduction in coal size Increase in its friability ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High rate of heating of coke ovens Increases the time of carbonisation None of these May damage its walls due to abrupt excessive swelling of coal Produces larger size coke Increases the time of carbonisation None of these May damage its walls due to abrupt excessive swelling of coal Produces larger size coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal as compared to that of lump coal Develops a low temperature flame Develops a non-luminous flame Can be done with less excess air Provides a lower rate of heat release Develops a low temperature flame Develops a non-luminous flame Can be done with less excess air Provides a lower rate of heat release ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Increase in ash content of blast furnace coke Does not affect its consumption in the furnace Increases its consumption in the furnace Reduces its consumption in the furnace Decreases its hardness and abrasion resistance Does not affect its consumption in the furnace Increases its consumption in the furnace Reduces its consumption in the furnace Decreases its hardness and abrasion resistance ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Highly caking coals Both B and C Produce strong coke May damage the coke oven walls during carbonisation Produce weak coke Both B and C Produce strong coke May damage the coke oven walls during carbonisation Produce weak coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature? Calorific value of the fuel Speed of combustion of fuel Heat transfer rate to the stock in the furnace Flame temperature achieved Calorific value of the fuel Speed of combustion of fuel Heat transfer rate to the stock in the furnace Flame temperature achieved ANSWER DOWNLOAD EXAMIANS APP
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