Related Questions

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
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
A 20
B 40
C 60
D 80
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
Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?
A Sinter
B Coke
C Iron ore
D Limestone
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be
A $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^{\frac{1}{2}}}$$
B $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^{\frac{1}{3}}}$$
C $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^2}$$
D $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^3}$$
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

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