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 fuel gases is heavier than air? Blast furnace gas Natural gas Water gas Coke oven gas Blast furnace gas Natural gas Water gas Coke oven gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For maximum discharge through a chimney, its height should be More than 105.7 metres 200 meters Infinitely long Equal to the height of the hot gas column producing draught More than 105.7 metres 200 meters Infinitely long Equal to the height of the hot gas column producing draught ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Gobar gas is produced by the __________ of 'gobar' (cow dung). Fermentation Dehydration Hydrolysis Oxidation Fermentation Dehydration Hydrolysis Oxidation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Highly reactive coke have lower Critical air blast (CAB) value Coke reactivity index (CRI) Porosity Both B and C Critical air blast (CAB) value Coke reactivity index (CRI) Porosity Both B and C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not used as a binder in coal briquetting? Pitch Molasses Tar Line Pitch Molasses Tar Line ANSWER DOWNLOAD EXAMIANS APP
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