Q. Which of the following is a rich fuel gas ?

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Q. Low temperature carbonisation of coal produces

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Q. Blast furnace coke is made from coal by

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Q. Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

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Q. Coke oven gas is stripped of its H₂S and mercaptans content by

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Q. In Lurgi coal gasifier,

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Q. Mineral matter content (M) and ash content (A) in coal are approximately related as

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Q. Use of pulverised coal in boiler furnace provides

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Q. Deficiency of combustion air during combustion of a gaseous fuel

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Q. Froth floatation is used for

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Q. (64-132) rank coal (ASTM) means a coal with 64%

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Q. The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

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Q. Which of the following is not a 'manufactured' fuel ?

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Q. Use of excess of combustion air in the combustion of fuels results in

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Q. Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?

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Q. Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter.

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Q. Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has

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Q. The calorific value of a gas of composition CO₂ = 20%, H₂ = 50%, CH₄ = 30%, is y. If the composition of gas is changed to H₂ = 50%, CH₄ = 30%, CO₂ = 10%, N₂ = 10%, then the calorifice value will be

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Q. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³ ), while the C.V. is same on weight basis (i.e., kcal/kg) ?

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Q. One kg of carbon for theoretically complete combustion requires __________ kg of air.

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