A. Calcination kiln
B. Blast furnace
C. Soaking pit
D. L.D. converter
Related Mcqs:
- Neutral atmosphere is maintained in a/an ____________ furnace?
A. Cold rolled steel coil annealing
B. Open hearth
C. Soaking pit
D. Walking beam reheating - _____________ atmosphere is maintained inside an iron blast furnace?
A. Oxidising
B. Reducing
C. Inert
D. Decarburising - A refractory wall separating the stock and the source of heat is provided in a__________________?
A. Updraft kiln
B. Muffle furnace
C. Continuous furnace
D. None of these - Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about ____________ percent?
A. 10-15
B. 25-30
C. 45-50
D. 65-70 - The purpose of controlling the furnace atmosphere is to prevent surface attack by__________________?
A. Oxidation/scaling
B. Decarburising
C. Sulphur penetration
D. Either of the above - In order to maintain an oxidising atmosphere in a furnace, it should have__________________?
A. More of excess air
B. Less of excess air
C. More of CO in flue gas
D. More of CO2 in flue gas - Which of the following variables affects the furnace capacity ?
A. Temperature of flue gas
B. Thermal conductivity of stock
C. Thickness of heating stock
D. All A., B. and C. - Which of the following is not a directly fired furnace ?
A. By-product coke oven
B. Calcination kiln
C. Sintering furnace
D. Open hearth furnace - The rate of scaling of furnace stock depends upon the_________________?
A. Temperature
B. Time
C. Nature of atmosphere
D. All A., B. and C. - 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
