Fuels and Combustion During combustion of gaseous fuels, deficiency of air Does not affect the flame length Increases the flame temperature Tends to shorten the flame Lengthens the flame Does not affect the flame length Increases the flame temperature Tends to shorten the flame Lengthens the flame ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In high temperature carbonisation (as compared to low temperature carbonisation) of coal Coke oven gas yield is more Tar yield is less but free carbon in tar is more All of these Calorific value of coke oven gas is less Coke oven gas yield is more Tar yield is less but free carbon in tar is more All of these Calorific value of coke oven gas is less ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coals used for the generation of producer gas should have Low fusion point of ash Very low ash content (8-10%) High caking index High volatile matter content Low fusion point of ash Very low ash content (8-10%) High caking index High volatile matter content 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 Its pulverisation (as it requires more power) Combustion of fire slacks on the grates Handling (e.g. when emptying wagons) None of these Its pulverisation (as it requires more power) Combustion of fire slacks on the grates ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of gobar gas (containing CH₄ = 60% , H₂ = 10% ; CO₂ = 30%) may be about __________ Kcal/Nm³. 10200 5400 1800 3200 10200 5400 1800 3200 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in Shallow and small piles Closed space without any ventilation facility Large heaps with small surface to volume ratio Fine sizes without the presence of any lump Shallow and small piles Closed space without any ventilation facility Large heaps with small surface to volume ratio Fine sizes without the presence of any lump ANSWER DOWNLOAD EXAMIANS APP
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