Related Questions

Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity?
A Sphere
B Cube
C Cylinder (L/D = 1)
D Raschig rings
The reciprocal of p/n is n/p and vice. Which of the following is the reciprocal of 3/2?
A 2/3
B 2/3
C 43/3
D 12/9
Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is
A 0.5
B 1
C $$\sqrt 2 $$
D $$\sqrt 3 $$
Sphericity of raschig ring (whose length and diameter are equal) is
A >1
B 1
C 2
The sphericity of a solid particle of cubical shape is
A $$\pi $$
B $${\left( {\frac{\pi }{6}} \right)^{\frac{1}{3}}}$$
C $${\left( {\frac{\pi }{6}} \right)^{\frac{1}{2}}}$$
D $$\frac{\pi }{3}$$
Sphericity of pulverised coal is
A 1
B >1
C ∞
For a non-spherical particle, the sphericity
A Is defined as the ratio of surface area of a sphere having the same volume as the particle to the actual surface area of the particle
B Has the dimension of length
C Is always less than 1
D Is the ratio of volume of a sphere having the same surface area as the particle to the actual volume of the particle
For raschig rings, the sphericity is
A 0.5
B 1
C $$\sqrt 3 $$
The reciprocal of stripping factor is termed as
A Selectivity index
B Relative volatility
C Absorption factor
D Murphree efficiency
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
A Rigid
B Tough
C Ductile
D Plastic

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