Q. With increase in the oxygen content of the coal, its __________ decreases.

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Q. Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature ?

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Q. Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

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Q. Washing of coal is done to reduce the

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Q. Volumetric ratio of N₂ to O₂ in dry atmospheric air is

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Q. Coke oven gas burns with an yellowish flame, because of the presence of

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Q. Main constituent of the gas produced from a gobar gas plant is

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Q. Steam is intermittently admitted into the fuel bed during the production of producer gas to

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Q. In general, the limit of inflammability/explosion limit of fuel gases is widened by the

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Q. Caking coal is desirable for

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Q. Blast furnace gas compared to coke oven gas has

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Q. "Micum Index" of a coke is a measure of its

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Q. 'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.

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Q. Volatile matter content in coking coal may be about __________ percent.

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Q. The main function of primary air in pulverised coal fired burner is to

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Q. __________ is used as jet engine fuel.

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Q. The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.

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Q. Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.

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Q. The catalyst used in shift converter is

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Q. The optimum percentage of excess air for combustion depends upon the __________ of the fuel.

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