Fuels and Combustion Undercharging of coal in the by-product coke ovens results in Increase in its throughput No change in the c.v. of coke oven gas Decrease in the c.v. of coke oven gas Increase in the c.v. of coke oven gas Increase in its throughput No change in the c.v. of coke oven gas Decrease in the c.v. of coke oven gas Increase in the c.v. of coke oven gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value as determined by bomb calorimeter is the Net calorific value at constant volume Lower calorific value at constant pressure Gross calorific value at constant pressure Higher calorific value at constant volume Net calorific value at constant volume Lower calorific value at constant pressure Gross calorific value at constant pressure Higher calorific value at constant volume ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following would require least amount of secondary air for combustion? Semi-bituminous coal containing 25% ash and 20% volatile matter Anthracite containing 10% volatile matter and 8% ash Bituminous coal containing 20% ash and 25% volatile matter Coke breeze containing 25% ash and 2% volatile matter Semi-bituminous coal containing 25% ash and 20% volatile matter Anthracite containing 10% volatile matter and 8% ash Bituminous coal containing 20% ash and 25% volatile matter Coke breeze containing 25% ash and 2% volatile matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuel gases is heavier than air? Blast furnace gas Coke oven gas Water gas Natural gas Blast furnace gas Coke oven gas Water gas Natural gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Beehive coke oven Gives larger yield of coke (around 85%) as compared to by-product ovens Facilitates by-products recovery Takes 2-3 days for coking of coal but requires no external fuel for heating Produces coke with very poor strength Gives larger yield of coke (around 85%) as compared to by-product ovens Facilitates by-products recovery Takes 2-3 days for coking of coal but requires no external fuel for heating Produces coke with very poor strength ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not a binder for coal briquetting? Bitumen Molasses None of these Coal tar Bitumen Molasses None of these Coal tar ANSWER DOWNLOAD EXAMIANS APP
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