Related Questions

Basic open hearth furnace (BOF) is not used for producing __________ steel.
A Killed
B Rimming
C High alloy
D None of these
Skull is not formed on the carbon blocks in the hearth of a blast furnace, when it becomes cold, becaus of its
A Non-wetting characteristic
B High thermal conductivity
C High crushing strength
D None of these
If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.
A Sidefired
B Underfired
C Covered
D Recirculating
Roof of a basic open hearth furnace is lined with __________ bricks.
A Silica
B Fireclay
C Dolomite
D Magnesite
__________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold.
A High thermal conductivity
B Low porosity
C Non-wetting characteristics
D High density
Bottom of basic open hearth furnace are constructed of
A Dead burnt magnesite ramming mass
B Porous fireclay bricks
C Semi-silica bricks
D Silicon carbide bricks
Hearth furnaces are not used for
A Roasting
B Melting
C Reheating
D None of these
__________ furnace is not an electric furnace.
A Arc
B Induction
C Pot
D Resistance
Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by
A Increasing the draft in the furnace
B Preheating the fuel gas
C Oxygen enrichment of combustion air
D Preheating the combustion air
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

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