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
Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about
A 0.1
B 1
C 2.5
D 3.5
The main charge in blast furnace is usually
A Iron ore & coke
B Iron ore, coke & air
C Limestone, coke & iron ore
D Limestone, sand & iron ore
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 charge is fed into the blast furnace through the
A Stack
B Throat
C Bosh
D Tyres
The charge of the blast furnace consists of
A Calcined ore (8 parts), coke (4 parts) and limestone (1 part)
B Calcined ore (4 parts), coke (1 part) and limestone (8 parts)
C Calcined ore (1 part), coke (8 parts) and limestone (4 parts)
D Calcined ore, coke and limestone all in equal parts
The coke in the charge of blast furnace
A Controls the grade of pig iron
B Acts as an iron bearing mineral
C Supplies heat to reduce ore and melt the iron
D Forms a slag by combining with impurities
A, B and C enter into a partnership. A contributes one-third of the capital while B contributes as much as A and C together contribute. If the profit at the end of the year amounts to Tk. 900, What would C receive?
A Tk. 200
B Tk. 150
C Tk. 100
D Tk. 300
Which is the main reducing agent during production of iron from iron ore in a blast furnace?
A C
B CO
C CO2
D H2

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