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Question: If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace. [A]. sidefired [B]. underfired [C]. covered [D]. recirculating Answer: Option B Explanation: No answer description available for this question.
Question: An example of indirectly heated furnace is the [A]. soaking pit [B]. muffle furnace [C]. reheating furnace [D]. none of these Answer: Option B Explanation: No answer description available for this question.
Question: Hearth furnaces are not used for [A]. roasting [B]. melting [C]. reheating [D]. none of these Answer: Option D Explanation: No answer description available for this question.
Question: An example of shaft furnace is the [A]. L.D. converter [B]. glass melting tank [C]. blast furnace [D]. soaking pit Answer: Option C Explanation: No answer description available for this question.
Ostwald charts are meant for__________________? A. Computing the excess/deficiency of combustion air B. Calculation of flue gas temperature C. Computation of flue gas analysis D. None of these
Which of the following furnaces will have maximum thermal efficiency ? A. Soaking pits B. Walking beam reheating furnaceC. Boiler furnace D. Rotary kilns
The function of an economiser in a boiler is to preheat the _____________________? A. Feedwater B. Combustion air C. Pulverised coal D. Furnace oil
Which of the following is not an additive for flue gases from furnace to reduce its dewpoint ? A. Ammonia B. Fine dolomite C. Alkaline powdersD. None of these
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 oxygenC. Blast furnace gas with air D. Blast furnace gas with oxygen
Fuel economy in an industrial furnace operation cannot be achieved by the use of__________________? A. Stoichiometric combustion air B. Non-preheated combustion air C. Combustion air not enriched with oxygen D. Recuperators