A. Rate of firing and emissivity of flame
B. Thermal conductivity of the charge & structural materials of furnace
C. Nature of process; whether batch, continuous or intermittent
D. All A., B. and C.
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Related Mcqs:
- Which furnace employs an I.D. fan for the removal of flue gases from the furnace ?
- A. Coke oven B. Blast furnace stoves C. Beehive coke oven D. High pressure boiler...
- Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C ?
- A. 5 B. 60 C. 20 D. 40...
- Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the_________________?
- A. Quantity & temperature of waste gas B. Dust concentration & nature of dust in waste gas C. Corrosive nature of the waste gas D. All A., B. and C....
- Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace ?
- A. Economiser B. Regenerator C. Ceramic recuperator D. Waste heat boiler...
- An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called ____________ furnace?
- A. Resistance B. Arc C. Low frequency induction D. None of these...
- Heat transfer rate to the stock/charge in the furnace does not depend upon the________________?
- A. Emissivity of the refractory walls B. Size of the furnace C. Use of waste heat recovery equipments D. Thickness of the stock...
- Heat transfer rate to the charge/stock in a furnace does not depend upon the________________?
- A. Type of fuels viz. solid, liquid or gaseous B. Flue gas temperature C. Emissivity of refractory walls D. Initial temperature of the charged stock...
- Which of the following is not an additive for flue gases from furnace to reduce its dewpoint ?
- A. Ammonia B. Fine dolomite C. Alkaline powders D. None of these...
- Scaling of furnace stock is reduced by _______________ in flue gas?
- A. CO B. H2 C. High CO/CO2 D. All A., B. & C....
- In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the__________________?
- A. Ostwald chart B. Cox chart C. Sankey diagram D. None of these...
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