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

Correct Answer: 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

Bissoy MCQ
#Chemical Engineering #Mechanical Operations

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
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 $$\sqrt 3 $$
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 raschig ring (whose length and diameter are equal) is
A >1
B 1
C 2
Reciprocal of sphericity is termed as the
A Specific surface ratio
B Shape factor
C Sauter diameter
D Surface area per unit mass
Sphericity of pulverised coal is
A 1
B >1
C ∞
For raschig rings, the sphericity is
A 0.5
B 1
C $$\sqrt 3 $$
একটি কণা t = 0 সময়ে স্থির অবস্থা থেকে যাত্রা শুরু করে। কণাটির ওপর প্রযুক্ত লব্ধি বল, সময় t এর সমানুপাতিক। কণাটির গতিশক্তি নিচের কোনটির সমানুপাতিক হবে? (A particle starts from rest at t = 0. The net force acting on the particle is proportional to time t. Its kinetic energy is proportional to which one of the following?)
A t2
B t3
C t
D t4
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where $$\omega $$ = Displacement of the particle from mean position)
A $$\omega \sqrt {{{\text{x}}^2} - {{\text{r}}^2}} $$
B $$\omega \sqrt {{{\text{r}}^2} - {{\text{x}}^2}} $$
C $${\omega ^2}\sqrt {{{\text{x}}^2} - {{\text{r}}^2}} $$
D $${\omega ^2}\sqrt {{{\text{r}}^2} - {{\text{x}}^2}} $$
The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by (where, r = Amplitude of motion and y = Displacement of the particle from mean position.)
A $$\omega \sqrt {{{\text{y}}^2} - {{\text{r}}^2}} $$
B $$\omega \sqrt {{{\text{r}}^2} - {{\text{y}}^2}} $$
C $${\omega ^2}\sqrt {{{\text{y}}^2} - {{\text{r}}^2}} $$
D $${\omega ^2}\sqrt {{{\text{r}}^2} - {{\text{y}}^2}} $$

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