Question: In a furnace employing forced draught as compared to induced draught, [A]. air is sucked in, so air leaks are more and hence the furnace efficiency is reduced. [B]. the fan operates hot and hence blades are liable to…

Question: Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of [A]. graphite powder [B]. thoria [C]. zircon powder [D]. beryllium Answer: Option C Explanation: No answer description…

Question: Combustion of fuel in a furnace with oxygen enriched air results in higher [A]. flue gas volume [B]. flame temperature [C]. fuel consumption [D]. stack loss Answer: Option B Explanation: No answer description available for this question.

Question: Artificial draught produced by a fan in the furnace can be controlled by the [A]. speed of the fan. [B]. damper. [C]. variation in the pitch of fan blades. [D]. all (a), (b) and (c). Answer: Option D Explanation:…

Question: The advantages of firing pulverised coal in the furnace lies in the fact that, it [A]. permits the use of high ash content coal. [B]. permits the use of low fusion point ash coal. [C]. accelerates the burning rate…

Question: Overfire burning in a furnace is a phenomenon characterised by [A]. supply of excess fuel. [B]. supply of excess air. [C]. burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air. [D]. none of…

Question: While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C. [A]. 2000 [B]. 3000 [C]. 4500 [D]. 6000 Answer: Option C…

Question: __________ furnace is not an electric furnace. [A]. Arc [B]. Induction [C]. Pot [D]. Resistance. Answer: Option C Explanation: No answer description available for this question.

Question: In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by [A]. conduction [B]. convection [C]. radiation [D]. can not be predicted. Answer: Option C Explanation: No answer description available for…

Question: 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 [A]. furnace oil with air. [B]. furnace oil with…