Fuels and Combustion During the carbonisation of coal All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C All of these All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In general, the limit of inflammability/explosion limit of fuel gases is widened by the Increase in gas pressure Increase in temperature (i.e. preheating) All of these Use of pure oxygen for combustion instead of air Increase in gas pressure Increase in temperature (i.e. preheating) All of these Use of pure oxygen for combustion instead of air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pick out the wrong statement. Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing None of these Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing None of these Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The pyragallol solution used in orsat apparatus can absorb All of these Only O₂ Both O₂ and CO₂ Both O₂ and CO All of these Only O₂ Both O₂ and CO₂ Both O₂ and CO ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent. 12 24 6 18 12 24 6 18 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Incomplete combustion of a fuel is characterised by the high __________ in the flue gas. Temperature Oxygen Carbon monoxide Smoke Temperature Oxygen Carbon monoxide Smoke ANSWER DOWNLOAD EXAMIANS APP
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