Related Questions

Width of the coke oven towards coke side is slightly more than that on pusher side to
A Facilitate easy discharging of coke as it swells during carbonisation
B Facilitate uniform heating of the oven
C Increase the output of the coke
D None of these
Coke oven walls are lined with __________ bricks.
A Silica
B Tar-dolomite
C Low thermal conductivity
D Fire clay
Faster rate of drying of moulded refractories results in high __________ of refractories.
A Green strength
B Voids
C Shrinkage
D Both B and C
Silica refractories are not used in
A Coke oven walls
B Beehive coke ovens
C Dome and upper portion of B.F. stoves
D Open hearth furnace roof
Percentage of methane in coke oven gas may be around
A 5
B 25
C 15
D 35
Percentage of hydrogen in coke oven gas may be around
A 10
B 25
C 45
D 60
With increase in the density of silica refractories, its
A Resistance to slag attack increases
B Spalling resistance reduces
C Both A & B
D Neither A nor B
Silica refractories
A Crack when subjected to sudden change of temperature
B Can not be used in the dome of hot blast stoves
C Have lower thermal conductivity than fireclay bricks
D All of the above
A cake is put in the oven at 7.20 am. If the cake takes three quarters of an hour to bake, at what time should it be taken out of the oven ?
A 8:10 a.m.
B 8:05 a.m.
C 8:15 a.m.
D 7:50 a.m.
Flushing liquor used for cooling coke oven gas constitutes of
A Ammoniacal liquor
B K2CO3 solution
C Dilute H2SO4
D Dilute HCl

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