Materials Science Mock Test 2

10%

Question 1 of 10

1. The void fraction is the ratio of unfilled volume to total volume of a structure. For ideal metallic FCC crystal, it is:

0.22

0.38

0.32

0.26

Question 1 of 10

Question 2 of 10

2. K-alpha x-rays have shorter wavelengths than K-beta x-rays?

False

True

Question 2 of 10

Question 3 of 10

3. The point coordinates of the vertex just opposite to the origin are

1 1 1

0 0 0

0 1 1

0 0 1

Question 3 of 10

Question 4 of 10

4. Miller indices of the hatched plane in the following figure are:

(3 2 0)

(2 3 1)

(1 1 1)

(3 2 1)

Question 4 of 10

Question 5 of 10

5. Laue’s model pictures XRD as reflection from parallel crystalline planes. Reflection is different from refraction as:

diffraction in crystals occurs only at Bragg’s angles

intensity of diffracted beams is less

all of the mentioned

diffraction occurs throughout the bulk

Question 5 of 10

Question 6 of 10

6. Consider the following cooling diagram for an amorphous solid.

Glass-transition temperature is represented as:

None of the mentioned

Question 6 of 10

Question 7 of 10

7. Metal glass was first prepared at:

University of Michigan

Technion

California Institute of Technology

Massachusetts Institute of Technology

Question 7 of 10

Question 8 of 10

8. Pores & cracks in crystalline solids can be classified as bulk defects.

True

False

Question 8 of 10

Question 9 of 10

9. How are point defects classified based on the source of the atom?

Statistical and structural

Interior and exterior

Random and ordered

Intrinsic and extrinsic

Question 9 of 10

Question 10 of 10

10. Coordination number of HCP and FCC lattices respectively are:

12, 12

8, 8

12, 8

4, 4

Question 10 of 10