Q. Assam coals suffers mainly from the disadvantage of high __________ content.

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Q. Preheating of coal charge for the coke ovens reduces the

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Q. Which of the following coke has the least percentage of ash ?

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Q. Soft coke is not

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Q. Mineral matter, 'M' and ash percentage 'A' in coal are roughly related as

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Q. Blast furnace gas constitutes mainly of

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Q. A good coking coal should have high __________ content.

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Q. Which of the following is not a binder for coal briquetting ?

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Q. The liquid used for the washing of coal in an industrial coal washery is a mixture of water and

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Q. Spontaneous combustion of coal on storage results due to

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Q. High temperature carbonisation of coal produces

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Q. Which of the following is the most poisonous gas ?

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Q. Bomb calorimeter can be used to determine the __________ of the coal.

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Q. Which of the following is a poisonous fuel gas?

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Q. In low temperature carbonisation (as compared to high temperature carbonisation) of coal

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Q. Washing of coal does not reduce its

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Q. Coke having higher porosity has

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Q. Calorific value of coke oven gas is around __________ Kcal/Nm³.

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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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