Fuels and Combustion During the carbonisation of coal Hard semi-coke starts shrinking at 600°C All tar is evolved at < 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C Hard semi-coke starts shrinking at 600°C All tar is evolved at < 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is a measure of the agglutinating (i.e., binding) property of coal? Gray-king index Thickness of plastic layer Caking index Swelling index Gray-king index Thickness of plastic layer Caking index Swelling index ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its Yield of carbonised products Calorific value Friability & oxygen content Caking index Yield of carbonised products Calorific value Friability & oxygen content Caking index ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Size of blast furnace grade coke is __________ mm. >100 15-25 0-15 25-80 >100 15-25 0-15 25-80 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The most matured coal out of the following is Bituminous Sub-bituminous Semi-anthracite Lignite Bituminous Sub-bituminous Semi-anthracite Lignite ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Yield of blast furnace gas is about __________ Nm³ /ton of pig iron. 10000 300 2000 5000 10000 300 2000 5000 ANSWER DOWNLOAD EXAMIANS APP
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