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 For every 10% increase in the excess air; the fuel consumption increases by __________ percent. 2 0.1 5 10 2 0.1 5 10 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuels is generally not used in thermal power plant boiler firing? Furnace oil, light diesel oil and tar/PCM Coal middling from washeries Pulverised coking coal F. gas, coke oven gas and L.D. converter gas Furnace oil, light diesel oil and tar/PCM Coal middling from washeries Pulverised coking coal F. gas, coke oven gas and L.D. converter gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pulverised coal used in boiler firing need not have High fusion point of its ash Less moisture content High bulk density Lower ash content High fusion point of its ash Less moisture content High bulk density Lower ash content ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A good coking coal should have high __________ content. Sulphur & phosphorus Moisture Ash None of these Sulphur & phosphorus Moisture Ash None of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Washing of coal decreases its Ash content Both B and C Caking index Mineral matter content Ash content Both B and C Caking index Mineral matter content ANSWER DOWNLOAD EXAMIANS APP
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