A. 0.5
B. 1
C. √2
D. √3
Related Mcqs:
- 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 - Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle)?
A. 6.V/D.S
B. V/6D.S
C. D.S/V
D. V/D.S - If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is φs is defined by________________?
A. φs = 6 Vp/dpsp
B. φs = Vp/dpsp
C. φs = 6 dpSp/Vp
D. φs = dpSp/Vp - The sphericity of a solid particle of cubical shape is ___________________?
A. π
B. (π/6)1/3
C. (π/6)1/2
D. π/3 - Equivalent diameter of a particle is the diameter of the sphere having the same __________________?
A. Ratio of surface to volume as the actual volume
B. Ratio of volume to surface as the particle
C. Volume as the particle
D. None of these - Sphericity of raschig ring (whose length and diameter are equal) is___________________?
A. > 1
B. < 1
C. 1
D. 2 - The sphericity of a cylinder of 1 mm diameter and length 3 mm is_________________?
A. 0.9
B. 0.78
C. 0.6
D. 0.5 - Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) ?
A. 0.5 D
B. D
C. 1.5 D
D. 2 D - In a grinding operation, the limiting particle size is the size of the _______________ particle in the sample?
A. Smallest
B. Largest
C. Either A. or B.
D. Neither A. nor B. - Sphericity of pulverised coal is__________________?
A. 1
B. < 1
C. > 1
D. ∞
