Fuels and Combustion During the carbonisation of coal All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C All tar is evolved at < 600°C Hard semi-coke starts shrinking 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 Pulverised coal used in boiler firing need not have Lower ash content Less moisture content High fusion point of its ash High bulk density Lower ash content Less moisture content High fusion point of its ash High bulk density ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuels is generally not used in thermal power plant boiler firing? F. gas, coke oven gas and L.D. converter gas Furnace oil, light diesel oil and tar/PCM Pulverised coking coal Coal middling from washeries F. gas, coke oven gas and L.D. converter gas Furnace oil, light diesel oil and tar/PCM Pulverised coking coal Coal middling from washeries ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the Incomplete combustion High oxygen in flue gas None of these Complete combustion Incomplete combustion High oxygen in flue gas None of these Complete combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Power alcohol as compared to straight run gasoline has lower Octane number Calorific value Specific gravity Viscosity Octane number Calorific value Specific gravity Viscosity ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air. Decreases Remains same Increases May increase or decrease depending on the type of fuel Decreases Remains same Increases May increase or decrease depending on the type of fuel ANSWER DOWNLOAD EXAMIANS APP
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