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.Management Sciences
Category: Furnace Technology
Reverberatory furnace is used for_____________________?
A. Roasting/reduction of ores
B. Annealing steel coil
C. Heating air
D. Steel melting
Which of the following is a directly fired intermittent furnace ?
A. Walking beam reheating furnace
B. Reverberatory furnace
C. Tower furnace
D. Tunnel kiln
Reducing atmosphere is maintained in a__________________?
A. Calcination kiln
B. Blast furnace
C. Soaking pit
D. L.D. converter
Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by______________________?
A. Preheating the combustion air
B. Oxygen enrichment of combustion air
C. Preheating the fuel gas
D. All A., B. & C.
The electric furnace in which heat is produced by a combination of induced current and skin effect is called _____________ furnace?
A. Arc
B. Resistance
C. Low frequency induction
D. High frequency induction
Combustion of fuel in a furnace with oxygen enriched air results in higher__________________?
A. Flue gas volume
B. Flame temperature
C. Fuel consumption
D. Stack loss
Advantages of use of preheated combustion air are__________________?
A. Saving in fuel consumption
B. Reduction in scale losses
C. Increase in flame temperature
D. All A., B. and C.
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
Unit of furnace loading is____________________?
A. Ton stock/hr/m2 hearth area
B. Ton stock/hr
C. Ton stock/m2 hearth area
D. Both B. and C.
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