A. Specific surface ratio
B. Shape factor
C. Sauter diameter
D. Surface area per unit mass
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 of raschig ring (whose length and diameter are equal) is___________________?
A. > 1
B. < 1
C. 1
D. 2 - 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 - Sphericity of pulverised coal is__________________?
A. 1
B. < 1
C. > 1
D. ∞ - 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 - For raschig rings, the sphericity is_____________________?
A. 0.5
B. 1
C. < 1
D. √3 - 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 - 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 - Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is ________________ ?
A. 0.5
B. 1
C. √2
D. √3 - A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _______________ flow of filtrate?
A. Compressible cakes and laminar
B. Incompressible cake and laminar
C. Compressible cake and turbulent
D. Incompressible cake and turbulent
