Q. By-products are __________ recovered in 'Beehive ovens'.

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Q. Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant ?

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Q. Percentage of hydrogen in coke oven gas may be around

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Q. Function of secondary air in pulverised coal firing is to

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Q. Calorific value of dry wood may be around __________ Kcal/kg.

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Q. Calorific value of gobar gas (containing CH₄ = 60% , H₂ = 10% ; CO₂ = 30%) may be about __________ Kcal/Nm³.

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Q. When steam is passed over coal resulting in the endothermic reaction represent by, C + H₂O = CO + H₂, it is called the __________ of coal.

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Q. Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.

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Q. Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

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Q. Ammonia content in raw coke oven gas is about __________ gm/Nm³.

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Q. Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

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Q. Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

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Q. Which of the following has the highest theoretical flame temperature ?

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Q. Ultimate analysis of coal determines its __________ content.

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Q. (64-132) rank coal (ASTM) means a coal with 64%

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Q. High sulphur (4-6%) coal in India are found in

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Q. High ash coals

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Q. Which of the following is not a by-product fuel ?

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Q. Preheating of combustion air is done to

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Q. Anthracite can be used for

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