Q. __________ is an indirectly heated furnace.

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Q. The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

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Q. In a muffle furnace, the muffle

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Q. Which is not a hearth furnace ?

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Q. An example of shaft furnace is the

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Q. Example of an indirectly heated furnace is

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Q. Which furnace employs preheating, heating and soaking zones ?

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Q. Calcination of limestone to produce lime is done in a __________ kiln.

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Q. Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of

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Q. Ceramic recuperators compared to metallic recuperators for the same duty

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Q. Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of

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Q. In reverberatory furnace, charge is heated mainly by

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Q. An example of a periodic furnace is the

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Q. Ostwald charts are meant for

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Q. Maximum heat transfer in high temperature furnaces is by

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Q. Fuel used in B.F. stove is

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Q. Tunnel kilns are usually used for

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Q. The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

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Q. Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

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Q. Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

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