Diffusion : General Science MCQ Practice Questions & Answers (Urdu)

General ScienceEasyDiffusion

1.

The following enhances the coring

A

Minute difference between liquids and solids

B

Marked difference between liquids and solids

C

Either

D

None

General ScienceEasyDiffusion

2.

Macro-segregation can be removed by

A

Annealing

B

Hot working

C

Both

D

None

General ScienceEasyDiffusion

3.

The following phenomena are useful in zone-refining process

A

Coring

B

Segregation

C

Both

D

None

General ScienceEasyDiffusion

4.

The most influencing factor of diffusivity

A

Diffusing species

B

Temperature

C

Lattice structure

D

Presence of defects

General ScienceEasyDiffusion

5.

Example for steady-state diffusion

A

Hydrogen purification by palladium sheet

B

Doping semi-conductors

C

Corrosion resistance of duralumin

D

Decarburization of steel

General ScienceEasyDiffusion

6.

Not an example for short-circuit path

A

Vacancy

B

Dislocations

C

Grain boundaries

D

External surfaces

General ScienceEasyDiffusion

7.

The following mechanism contributes very little the diffusivity

A

Vacancy

B

Interstitial

C

Substitutional

D

Self-interstitial

General ScienceEasyDiffusion

8.

The value of error function for 8 is

A

-8

B

-1

C

1

D

8

General ScienceEasyDiffusion

9.

Probably the fastest diffusing species in Fe is

A

H

B

Ni

C

W

D

C

General ScienceEasyDiffusion

10.

Diffusion can occur in ....................... materials

A

Solid

B

Liquid

C

Gaseous

D

All

Diffusion in General Science : Practice MCQ Questions & Answers with Explanations

Diffusion in General Science : Practice MCQ Questions & Answers with Explanations