A. Calcination kiln
B. Blast furnace
C. Soaking pit
D. L.D. converter
A. Soaking pit
B. Open hearth furnace
C. Coke ovens
D. None of these
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
A. Is the removal of carbon from iron carbide (Fe3C)
B. Affects its crystalline structure
C. Is favoured by CO2
D. All A., B. and C.
A. Surface area & emissivity of the stock
B. Properties of the muffle wall (temperature, area, and emissivity)
C. Both A. & B.
D. Neither A. nor B.
A. Store smaller quantity of waste heat
B. Are lighter & compact
C. Involve higher initial cost
D. All A., B. & C.
A. Transportation of coal
B. Drying of coal
C. Combustion of coal by supplying it around the burner
D. Preheating the primary air