Q. Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called

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Q. Which of the following is not applicable to fluidised bed combustion of coal ?

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Q. Coal containing large quantity of __________ are difficult to wash.

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Q. Which of the following is not a micro component present in coal ?

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Q. Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.

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Q. A coal containing high amount of volatile matter will have

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Q. The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.

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Q. Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)?

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Q. Which of the following is coking ?

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Q. Undercharging of coal in the by-product coke ovens results in

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Q. During the carbonisation of coal

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Q. Pulverised coal used in boiler firing need not have

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Q. Lurgi coal gasifier is a pressurised __________ bed reactor.

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Q. Which is the most matured coal ?

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Q. The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be

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Q. Caking index of coal blend used for blast furnace coke making is about

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Q. Washing of coal

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Q. Calorific value of of blast furnace gas is around __________ KCal/Nm³.

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Q. In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.

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Q. Coal tar (produced by high temperature carbonisation) is the main source of

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