Fuels and Combustion Short/intense flame is produced during combustion of gaseous fuel by using Low amount/current of combustion air High amount/current of combustion air Very little excess air Preheated secondary air Low amount/current of combustion air High amount/current of combustion air Very little excess air Preheated secondary air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C. 120 65 180 30 120 65 180 30 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Actual flame temperature is always lower than the adiabatic flame temperature, because there is Always loss of heat from the flame Neither A nor B Both A & B No possibility of obtaining complete combustion at high temperature Always loss of heat from the flame Neither A nor B Both A & B No possibility of obtaining complete combustion at high temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent. 10 & 3 3 & 10 15 & 8 10 & 20 10 & 3 3 & 10 15 & 8 10 & 20 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of phosphorous in metallurgical coal Badly affects the quality of steel Increases its caking power Is not undersirable Reduces its calorific value Badly affects the quality of steel Increases its caking power Is not undersirable Reduces its calorific value 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 Fine sizes without the presence of any lump Large heaps with small surface to volume ratio Closed space without any ventilation facility Shallow and small piles Fine sizes without the presence of any lump Large heaps with small surface to volume ratio Closed space without any ventilation facility Shallow and small piles ANSWER DOWNLOAD EXAMIANS APP
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