Q. Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

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Q. Furnace pressure is normally controlled by regulating the

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Q. An example of indirectly heated furnace is the

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Q. Specific heating capacity of a furnace is expressed as

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Q. Forced recirculation of furnace gases is practised

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Q. Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the

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Q. Air filtration in a furnace

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Q. Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing ?

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Q. Which of the following is a periodic furnace?

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Q. Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a

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Q. Regenerators compared to the recuperators for the same duty

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Q. Regenerators are used for waste heat recovery in

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Q. Which of the following furnaces will have maximum thermal efficiency ?

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Q. Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an

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Q. Dampers are located

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Q. Protective gas used in the annealing furnace for steel coil comprises of

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Q. Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of

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Q. Scaling of furnace stock is reduced by __________ in flue gas.

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Q. __________ furnace is not an electric furnace.

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Q. The main function of a muffle in the muffle furnace is to

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