Related Questions

Faster rate of drying of moulded refractories results in high __________ of refractories.
A Green strength
B Voids
C Shrinkage
D Both B and C
Panel test determines the __________ of refractories.
A Fusion point
B Spalling resistance
C Slag penetration resistance
D Refractoriness under load (RUL)
Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity).
A Fireclay
B Carborundum
C Graphite
D Chromite
Presence of MgO in alumino-silicate refractories __________ its refractoriness.
A Increases
B Lowers
C Does not affect
D Either A or B; depends on its quantity
Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as __________ percent.
A 55
B 70
C 80
D 90
Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent.
A 10
B 15
C 20
D 30
Porosity of fireclay refractories is __________ percent.
A 5-10
B 10-25
C 25-35
D 35-50
The largest consumer of refractories is the __________ industry.
A Cement
B Metallurgical
C Fertiliser
D Power
Refractories used in/for __________ should have low thermal conductivity.
A Coke ovens
B Insulation
C Regenerators
D Muffle furnaces
Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm².
A 10
B 100
C 500
D 1000

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