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

3/4th of square were taken to form shape A and the rest was made to form shape B. Shape A was divided into four equal squares (Shape C), what will be the ratio of the one shape C to one shape B.

A

1:4

B

3:16

C

1:2

D

3:4

For spheres, volume shape factor is given by

A

π(=A/D²)

B

2π(=2A/D²)

C

π/6(=V/D³)

D

AD/V

For spheres, the specific surface shape factor is given by

A

$$\frac{{{\text{AD}}}}{{\text{V}}}$$

B

$$\frac{{\text{D}}}{{\text{V}}}$$

C

$$\frac{{\text{A}}}{{\text{V}}}$$

D

$$\sqrt {\frac{{{\text{AD}}}}{{\text{V}}}} $$

In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes

A

Are easier to clean

B

Are less prone to fouling

C

Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less

D

None of these

The area of two spheres are in the ratio 1:4. The ratio of their volume is-

A

1 : 6

B

1 : 8

C

1 : 4

D

1 : 2

If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following:

A

Q = S + F

B

Q = S - F

C

Q = F - S

D

Q = S × F

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

Shape factor for a cylinder whose length equals its diameter is

A

1.5

B

0.5

C

1.0

D

2.0

Solution Y is 40 percent sugar by volume and solution X is 20 percent sugar by volume. how many gallons of solution that is 25 percent sugar by volume/

A

75

B

150

C

240

D

450

Solution X is 10% percent alcohol by volume, and solution Y is 30 percent alcohol by volume. How many milliliters of solution Y must be added to 200 milliliters of solution X to create a solution that is 25 percent alcohol by volume?

A

600

B

800

C

300

D

250

E

None of these

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

Related Questions