Materials Science Mock Test 3

10%

Question 1 of 10

1. In which type of dislocation planes are displaced relative to each other through shear?

Edge dislocation

Jog dislocation

Mixed dislocation

Screw dislocation

Question 1 of 10

Question 2 of 10

2. In polymeric material the surface of which type of layer is considered to be an interfacial defect?

Main chain unit

Chain ends

Chain folded layer

Short side branches

Question 2 of 10

Question 3 of 10

3. Which of the following is not an important application of microstructure examination?

To design alloys with new property combinations

To predict the properties of materials once these relationships have been established

To ascertain the mode of chemical fracture

To ensure that the associations between the properties and structure (and defects) are properly understood

Question 3 of 10

Question 4 of 10

4. Which of the following dislocation can glide but not climb?

Edge dislocation

Screw dislocation

Jog dislocation

Mixed dislocation

Question 4 of 10

Question 5 of 10

5. What will be the interfacial energy for domain wall?

Greatest compared to other interfacial defects

Less than the external surface and grain boundary but more than other interfacial defects

Least compared to other interfacial defects

Less than external surface but more than other interfacial defects

Question 5 of 10

Question 6 of 10

6. Concentration gradient refers to:

Change of concentration with respect to space

Change of concentration with respect to time

Change of concentration with respect to temperature

None of the mentioned

Question 6 of 10

Question 7 of 10

7. Osmosis is different from diffusion as:

Osmosis is a form of active transport

In osmosis, solute moves from lower concentration to higher

Diffusion requires semi-permeable membrane

Osmosis requires a liquid solvent

Question 7 of 10

Question 8 of 10

8. What is the difference between the angle of Burgers vector and dislocation line in edge dislocation and screw dislocation?

90 degrees

45 degrees

-90 degrees

0 degrees

Question 8 of 10

Question 9 of 10

9. Which of the following oxides are highly defective?

FeO

Al₂O₃

CaO

MgO

Question 9 of 10

Question 10 of 10

10. Diffusion is not used in which of the following?

Catalysis

Heat treatment of metals

Manufacturing of alloys

Doping of semiconductors

Question 10 of 10