Q. The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be

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Q. Caking index of coal blend used for blast furnace coke making is about

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Q. Washing of coal

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Q. Calorific value of of blast furnace gas is around __________ KCal/Nm³.

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Q. In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.

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Q. Coal tar (produced by high temperature carbonisation) is the main source of

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Q. The calorific value is the highest out of the following for

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Q. Coke compared to the coal from which it has been made, contains

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Q. A gaseous fuel in order to develop luminousity on burning, must contain

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Q. Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in

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Q. The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called

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Q. A coal having high volatile matter content will

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Q. During coking of coal, the ash content (percentage)

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Q. Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.

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Q. The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

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Q. The weathering index of a coal

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Q. Bright coal

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Q. Most of the coking coals are

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Q. Gobar gas constitutes mainly of

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Q. High ash containing coke

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