Fuels and Combustion Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction? CO + H₂O ⟷ CO₂ + H₂ C + H₂O ⟷ CO + H₂ 2CO ⟷ C + CO₂ C + 2H₂O ⟷ CO₂ + 2H₂ CO + H₂O ⟷ CO₂ + H₂ C + H₂O ⟷ CO + H₂ 2CO ⟷ C + CO₂ C + 2H₂O ⟷ CO₂ + 2H₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always Unpredicatable > 1 1 Unpredicatable > 1 1 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always > 1 Unpredictable 1 < 1 > 1 Unpredictable 1 < 1 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Rate of low temperature oxidation of coal due to bad storage conditions Is accelerated by storage in large heaps with small surface to volume ratio Is more for low volatile coal compared to high volatile coal Decreases with increase in surface area Does not vary with increase in surface area Is accelerated by storage in large heaps with small surface to volume ratio Is more for low volatile coal compared to high volatile coal Decreases with increase in surface area Does not vary with increase in surface area ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Spontaneous combustion of coal on storage results due to Low temperature oxidation All of these Storage in large heaps with small surface to volume ratio Inadequate ventilation Low temperature oxidation All of these Storage in large heaps with small surface to volume ratio Inadequate ventilation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not applicable to fluidised bed combustion of coal? It achieves higher fuel combustion efficiency It can not burn low grade coal None of these Less heat transfer surface area is required in boilers It achieves higher fuel combustion efficiency It can not burn low grade coal None of these Less heat transfer surface area is required in boilers ANSWER DOWNLOAD EXAMIANS APP
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