Related Questions

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
A 20
B 40
C 60
D 80
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
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
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
Abrasion index of blast furnace coke should be around __________ percent.
A 20
B 35
C 80
D 55
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
A 1.5
B 3
C 5
D 7
Which of the following combustibles is absent in blast furnace gas?
A H2
B CH4
C CO
D None of these
__________ atmosphere is maintained inside an iron blast furnace.
A Oxidising
B Reducing
C Inert
D Decarburising
The portion of the blast furnace below its widest cross-section is called
A Hearth
B Stack
C Bosh
D Throat
Blast furnace is used to produce
A Pig iron
B Cast iron
C Wrought iron
D Steel

Next steps