Fuels and Combustion Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent. In between 37 & 71% None of these >71% < 37% In between 37 & 71% None of these >71% < 37% ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High temperature in gasification of coal favours Both B and C Low production of CO₂ High production of CO High production of CO₂ Both B and C Low production of CO₂ High production of CO High production of CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coke oven gas constitutes mainly of CH₄ & CO H₂ & CO₂ H₂ & CO H₂ & CH₄ CH₄ & CO H₂ & CO₂ H₂ & CO H₂ & CH₄ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Rate of low temperature oxidation of coal due to bad storage conditions 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 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 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Grindability index of a coal is 100. It implies that the Power consumption in grinding the coal will be very high Coal can't be pulverised Coal can be pulverised with great difficulty Coal can be easily pulverised Power consumption in grinding the coal will be very high Coal can't be pulverised Coal can be pulverised with great difficulty Coal can be easily pulverised ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not applicable to fluidised bed combustion of coal? It can not burn low grade coal It achieves higher fuel combustion efficiency None of these Less heat transfer surface area is required in boilers It can not burn low grade coal It achieves higher fuel combustion efficiency None of these Less heat transfer surface area is required in boilers ANSWER DOWNLOAD EXAMIANS APP
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