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
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
Dried milk dried meat are examples of preservation by
A Pasteurization
B Dehydration
C Strerilization
D None of the above
Magnesite refractories are generally not used in the
A Electric furnace walls
B Steel melting furnace
C Open hearth furnace
D Burning zone of cement kilns
Silicon carbide refractories are used in the
A Muffle furnace
B Zinc smelting furnace
C Ceramic recuperators
D All of the above
Carbon refractories are exclusively used in the
A Hearth of blast furnace
B Walls of coke oven
C Regenerators of coke oven
D Side wall of soaking pits
With increasing alumina content, the fusion point of high alumina refractories
A Increases
B Decreases
C Remains constant
D May increase or decrease ; depends on its alumina content
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
Except __________ , all other refractories are bad conductors of electricity (i.e, have low electrical conductivity).
A Fireclay
B Carborundum
C Graphite
D Chromite
Cold crushing strength of refractories depends upon its
A Composition
B Texture
C Firing temperature
D All of the above

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