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 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 21% excess oxygen has been used for combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr. 2.5 0.5 20 10 2.5 0.5 20 10 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Safe condition for storage of high V.M. bituminous coal is that Height of the coal heap should be < 3 metres Both A and B Neither A nor B Maximum 200 tons should be stored in a heap Height of the coal heap should be < 3 metres Both A and B Neither A nor B Maximum 200 tons should be stored in a heap ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A particular coal is said to be free burning when it None of these Burns completely Shows little or no fusing action Gives smokeless burning None of these Burns completely Shows little or no fusing action Gives smokeless burning ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coking time in beehive coke oven is about 2-3 days Two weeks 12 hours One week 2-3 days Two weeks 12 hours One week ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent. 15 to 25 75 35 to 45 55 to 75 15 to 25 75 35 to 45 55 to 75 ANSWER DOWNLOAD EXAMIANS APP
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