Fuels and Combustion During the carbonisation of coal Hard semi-coke starts shrinking at 600°C All of these All tar is evolved at < 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C Hard semi-coke starts shrinking at 600°C All of these All tar is evolved at < 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Very __________ coals are completely devoid of cokability i.e, it is non coking. Young Neither A nor B Mature Both A & B Young Neither A nor B Mature Both A & B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Critical Air Blast (CAB) value of coke is a direct measure of its None of these Strength Hardness Reactivity None of these Strength Hardness Reactivity ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is a rich fuel gas? Coal gas from underground gasification of coal None of these Refinery gases Producer gas Coal gas from underground gasification of coal None of these Refinery gases Producer gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal containing high amount of volatile matter will have Low ignition temperature Very little ash content Low adiabatic flame temperature High fusion point of its ash Low ignition temperature Very little ash content Low adiabatic flame temperature High fusion point of its ash ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In low temperature carbonisation of coal, the Yield of tar is about 3% of dry coal Volatile matter in coke is zero Temperature maintained is 700°C Yield of coke oven gas is 290 Nm³ /ton dry coal Yield of tar is about 3% of dry coal Volatile matter in coke is zero Temperature maintained is 700°C Yield of coke oven gas is 290 Nm³ /ton dry coal ANSWER DOWNLOAD EXAMIANS APP
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