Q. The hottest part of the flame lies in its ___________ zone.

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Q. Percentage of methane in coke oven gas may be around __________

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Q. __________ of the coal is the basis for Seylor’s coal classification.

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Q. Caking index of the coal blend used for the manufacture of metallurgical coke should be around __________

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Q. High excess air in combustion of fuels results in __________

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Q. The heat of combustion of a fuel __________

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Q. _________ has the widest inflammability limit (explosion limit) of all the gases.

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Q. What are the main constituents of benzol?

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Q. With increase in moisture content of coal, its __________

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Q. Oxygen percentage (by weight) in atmospheric air is?

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Q. In flue gas analysis by Orsat’s apparatus, carbon dioxide is absorbed by __________

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Q. Presence of free moisture in coal is most disadvantageous during __________

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Q. Which of the following petrographic constituents of coal is non-coking?

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Q. ‘Fat’ coal means a coal having __________

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Q. Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.

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Q. Proximate analysis of coal determines its __________ content.

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Q. If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be?

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Q. “Overfire burning” in a furnace is a phenomenon characterised by the __________

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Q. Atomising steam to fuel oil ratio in a burner should be around __________

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Q. Presence of free moisture in coal during its high temperature carbonisation __________

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