Q. The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C.

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Q. Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?

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Q. Pick out the wrong statement.

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Q. Combustion of pulverised coal as compared to that of lump coal __________

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Q. The decrease in the atomic number is not observed in case of __________

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Q. Which of these is the outer most coating in the burning of a coke particle?

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Q. Which law deals with the rate of diffusion of Oxygen per unit surface area of the particle?

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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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