Furnace Technology Questions

• Power required in case of forced draught as compared to induced draught (for the same draught produced) is
• Which of the following is not a directly fired furnace?
• The heat recoverable from flue gases of furnaces depends on the
• Maximum heat transfer in high temperature furnaces is by
• To reduce the stack loss, heat recovery from flue gas can be done by
• Means for giving direction to the circulation of gases in furnaces are
• Which furnace employs preheating, heating and soaking zones?
• The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
• Low stack loss indicates the
• Which is not a hearth furnace?
• Coke ovens in steel plant are heated by
• Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by
• An example of a periodic furnace is the
• Calcination of limestone to produce lime is done in a __________ kiln.
• Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.
• Ostwald charts are meant for
• The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.
• In order to maintain a reducing atmosphere in a furnace, it should have
• Fuel used in B.F. stove is
• In reverberatory furnace, charge is heated mainly by