Q. Highly caking coals

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Q. Main use of hard coke produced by high temperature carbonisation is in the

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Q. Hard pitch is used for making

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Q. Supply of excess air for complete combustion of fuel is necessitated to facilitate

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Q. A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

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Q. Combustion of pulverised fuel

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Q. Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.

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Q. Low temperature oxidation of coal during storage does not decrease its

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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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