Related Questions

Cold crushing strength of a refractory does not depend upon its
A Shape
B Composition
C Firing temperature
D Texture
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
A Mortars
B Cements
C Castables
D None of these
If a refractory contains high content of silicon, it means refractory is
A Acidic
B Basic
C Neutral
D Brittle
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
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
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
Cold crushing strength of refractories depends upon its
A Composition
B Texture
C Firing temperature
D All of the above
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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