Q. If d is the diffusion coefficient and t is the boundary layer thickness. Then the mass transfer coefficient k is given by?

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Q. Gobar gas is produced by the __________ of ‘gobar’ (cow dung).

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Q. Coking time in beehive coke oven is about __________

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Q. The maximum adiabatic flame temperature is attained when the fuel is burnt with __________

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Q. Height of coke oven is limited (say maximum up to 7 metres) mainly by the __________

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Q. Which of the following has the highest calorific value?

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Q. Higher fuel combustion efficiency cannot be achieved by __________

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Q. Particular coal is said to be free burning when it __________

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Q. The cooling medium used in dry quenching of coke is __________

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Q. High amount of sulphur and phosphorous in coke causes __________

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Q. Cannel coal and boghead coal are the examples of __________

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Q. The difference between total carbon and fixed carbon of coal will be minimum in case of __________

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Q. Out of the following fuels, the difference between the net and gross calorific value is maximum in case of __________

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Q. Which of the following is the maximum coal producing state in India?

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Q. A good quality coal should have __________

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Q. __________ prohibits the use of alcohols directly in petrol engines.

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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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