A. 5
B. 60
C. 20
D. 40
A. Retards the heat transfer
B. Assists in temperature equalisation in the charge
C. Permits the use of controlled atmosphere for the protection of stock
D. All A., B. and C.
A. Roasting
B. Melting
C. Reheating
D. None of these
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. Conduction
B. Convection
C. Radiation
D. Either A., B. or C.; depends on the type of furnace
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.
A. kcal/hr/m3 combustion space
B. kcal/m3 combustion space
C. kcal/hr
D. None of these
A. Are lighter
B. Occupy more space
C. Are less costly
D. Have higher pressure differential between flue gas & air side
A. Occupy more space
B. Are less costly
C. Are of smaller size
D. All A., B. and C.
A. Flue gas volume
B. Flame temperature
C. Fuel consumption
D. Stack loss