Related Questions

Blast furnace stoves are meant for heating
A Air
B Blast furnace gas
C Steam
D None of these
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
A 15
B 40
C 70
D 85
Operation of blast furnace stove is based on the principles of a __________ furnace.
A Regenerative
B Recuperative
C Both A and B
D Neither A nor B
In the blast furnace, incorporation of water vapour in the blast gives the following effect.
A Increases the reducing potential of the gas
B Increases the flame temperature
C No significant change occurs
D Increases the hydrogen content in the metal
Abrasion index of blast furnace coke should be around __________ percent.
A 20
B 35
C 80
D 55
The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.
A 0.2
B 2
C 4
D 8
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.
A 50
B 65
C 85
D 99
The open "Sigrees" or coal stoves often require fanning to sustain burning because of
A Tendency of carbon dioxide to form a layer along with dust smoke
B Lack of oxygen in the surroundings of sigrees
C Accumulation of smoke and dust over the sigrees
D Interrupted release of moisture from the material
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
A Bauxite
B Limestone
C Quartz
D Manganese
Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.
A 20
B 40
C 65
D 80

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