Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is

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 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

$$\frac{\pi }{3}$$

If the length of a edge of cube X is thrice the length of an edge of cube Y, What is the ration of the volume of cube Y to the volume of cube X?

A

1/2

B

1/4

C

1/6

D

1/8

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

A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long?

A

48

B

32

C

24

D

18

Sphericity of raschig ring (whose length and diameter are equal) is

A

>1

B

1

C

2

a box is made in the form of a cube. IF a second cubical box has inside first box , how many times as much does the second box contain ?

A

6

B

9

C

12

D

27

A box is made in the form of a cube. If a second cubical ox has inside dimensions three times those of the first box, how many times as much does the second box contain?

A

6

B

9

C

12

D

27

A box is made in the form of a cube. If a second cubical box has inside dimensions three times those of the first box, how many times as much does the second box contain?

A

12

B

27

C

9

D

6

A box is made in the form of a cube. If a second cubical box has inside dimensions three those of the first box, how many times as much does the second contain?

A

27

B

12

C

9

D

6

Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is

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