Related Questions

The maximum value of hoop compression in a dome is given by (where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome)
A wR / 4d
B wR/2d
C wR/d
D 2wR/d
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
Outer combustion chamber of blast furnace stove is lined with __________ bricks.
A Fireclay
B Silica
C Chrome magnesite
D Zirconia
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
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is
A Water
B Carbon tetrachloride
C Paraffin
D Ethylene glycol
In the lower part of the blast furnace (zone of fusion), the temperature is
A 400°C to 700°C
B 800°C to 1000°C
C 1200°C to 1300°C
D 1500°C to 1700°C
Most of the phosphorous present in the blast furnace burden enters into
A Hot metal
B Flue gases
C Slag
D Refractory lining
The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the
A Venturi atomiser
B Gravity settling chamber
C Electro-static precipitator
D Cyclone separator
Which property of refractories is the most important for top section of the blast furnace?
A Resistance to abrasion
B Resistance to slag peneration
C Stability of volume at high temperature
D Resistance to corrosion by slag

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