For spheres, volume shape factor is given by____________________?

Related Mcqs:

1. For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter) ?

   A. π = (A/D2)
   B. π/6 = (V/D3)
   C. AD/V
   D. None of these

2. For spheres, the specific surface shape factor is given by___________________?

   A. AD/V
   B. D/V
   C. A/V
   D. √(AD/V)

3. Shape factor for a cylinder whose length equals its diameter is_________________?

   A. 1.5
   B. 0.5
   C. 1.0
   D. 2.0

4. In a ball mill, the volume occupied by the balls (when the mill is stopped) is about _______________ percent of the volume of the mill?

   A. 35
   B. 50
   C. 70
   D. 85

5. Size reduction of asbestos and mica is done by____________________?

   A. Hammer mills
   B. Rod mills
   C. Gyratory crushers
   D. Crushing rolls

6. Mixing of light fine powder such as insecticides is done by____________________?

   A. Banbury mixer
   B. Pug mill
   C. Impact wheels
   D. Kneader

7. 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

8. The basic filtration equation is given as dt/dV = (μ/A ΔP). [(α .CV/A) + Rm], where, V is volume of the filtrate; A is the filtration area, a is specific cake resistance, μ is viscosity of the filtrate, and C is the concentration of the solids in the feed slurry. In a 20 minutes constant rate filtration, 5 m3 of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes, it will take for another 5 m3 of filtrate to be produced? Neglect filter medium resistance, Rm; assume incompressible cake ?

   A. 10
   B. 20
   C. 25
   D. 30

9. The capacity of a classifier in ‘tons of solid/hr’ is given by (where, A = cross-sectional area in m2, V = rising velocity of fluid in m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids in kg/m3)_________________?

   A. 3.6 AVS.ρ
   B. 3.6 A.V.ρ
   C. 3.6 A.S. ρ
   D. 3.6 AVS/ρ
   Answer: Option

10. Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) ?

    A. m/ρ . Vp
    B. m . ρ/Vp
    C. m . Vp/ρ
    D. Vp/m . ρ