Related Questions

Cold crushing strength of a refractory does not depend upon its
A Shape
B Composition
C Firing temperature
D Texture
Faster rate of drying of moulded refractories results in high __________ of refractories.
A Green strength
B Voids
C Shrinkage
D Both B and C
What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?
A 16°
B 32°
C 40°
D 46°
Choke crushing (in case of a Jaw crusher) compared to free crushing
A Results in increased capacity
B Consumes less power
C Consumes more power
D Both A and C
For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to
A The new surface created
B The size reduction ratio
C The change in volume due to crushing
D None of these
RUL of refractories depends on the
A Chemical composition
B Physical structure
C Presence of impurities like iron & alkali
D All of the above
The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond's law, Rittinger's law and Kick's law) depend upon the
A Feed material
B Type of crushing machine
C Both A & B
D Neither A nor B
Angle of nip of the crushing rolls does not depend upon the
A Diameter of the rolls
B Speed of the rolls
C Product size
D Feed size
Crushing strength of a first class brick should not be less than
A 3.5 N/mm2
B 7.0 N/mm2
C 10.5 N/mm2
D 14.0 N/mm2
For a square key made of mild steel, the shear and crushing strength are related as
A Shear strength is equal to crushing strength
B Shear strength is greater than crushing strength
C Shear strength is less than crushing strength
D None of the above

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