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 Which of the following has the highest flame velocity? CH₄ CO H₂ C₂H₆ CH₄ CO H₂ C₂H₆ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High ash containing coke Produces more slag when used in the blast furnace Is desirable in producer gas manufacture None of these Has poor strength and abrasion resistance Produces more slag when used in the blast furnace Is desirable in producer gas manufacture None of these Has poor strength and abrasion resistance ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of BaSO₄ & NaCl MgCO₃ & NaCl MgSO₄ & BaCl₂ MgO & Na₂CO₃ BaSO₄ & NaCl MgCO₃ & NaCl MgSO₄ & BaCl₂ MgO & Na₂CO₃ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion When steam is passed over coal resulting in the endothermic reaction represent by, C + H₂O = CO + H₂, it is called the __________ of coal. Coalification Gasification Carbonisation Oxidation Coalification Gasification Carbonisation Oxidation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in C/H ratio of a fuel, the dew point of flue gases Increases Decreases Remains same May increase or decrease ; depends on the type of fuel Increases Decreases Remains same May increase or decrease ; depends on the type of fuel ANSWER DOWNLOAD EXAMIANS APP
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