Mechanical Metallurgy Mock Test 2

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Question 1 of 10

1. In the face-centered cubic structure, the (111) octahedral planes and the (110) directions are the close-packed systems. What is the total number of possible slip system in FCC?

Question 1 of 10

Question 2 of 10

2. The highest value of the critical resolved shear stress will be obtained in which of the following case?

mechanical-metallurgy-questions-answers-plastic-deformation-single-crystal-critical-resolved-shear-stress-q7c

mechanical-metallurgy-questions-answers-plastic-deformation-single-crystal-critical-resolved-shear-stress-q7b

mechanical-metallurgy-questions-answers-plastic-deformation-single-crystal-critical-resolved-shear-stress-q7a

mechanical-metallurgy-questions-answers-plastic-deformation-single-crystal-critical-resolved-shear-stress-q7d

Question 2 of 10

Question 3 of 10

3. The force required to move a dislocation is known as ____________

frictional force

drag force

hearing-nabarro force

peierls-nabarro force

Question 3 of 10

Question 4 of 10

4. Find the Miller indices of the given blue plane in the diagram, given that side of the cube, is equal to 1?

(1,1,1)

(1,0,0)

(0,0,1)

(0,1,0)

Question 4 of 10

Question 5 of 10

5. What is closed packed direction body-centered cubic system?

<111>

<122>

<100>

<110>

Question 5 of 10

Question 6 of 10

6. Which of the following diagram is the correct representation of the dislocation loop?

mechanical-metallurgy-questions-answers-burger-vector-dislocation-loop-q9b

mechanical-metallurgy-questions-answers-burger-vector-dislocation-loop-q9d

mechanical-metallurgy-questions-answers-burger-vector-dislocation-loop-q9c

mechanical-metallurgy-questions-answers-burger-vector-dislocation-loop-q9a

Question 6 of 10

Question 7 of 10

7. The unit of dislocation density is ___________

m²

m^-2

m³

Question 7 of 10

Question 8 of 10

8. Octahedral stresses are the stresses acting on the faces of a three-dimensional octahedron which has the geometric property that the faces of the planes make equal angles with each of the three principal directions of stresses.

True

False

Question 8 of 10

Question 9 of 10

9. Inhomogeneous deformation of crystal results in regions of different orientation called deformation bands. Deformation bands have been observed in both fcc and bcc metals, but not in hcp metals.

False

True

Question 9 of 10

Question 10 of 10

10. Single Dislocation can be physically seen with ________________

transmission electron microscope

scanning electron microscope

x-ray diffraction

optical microscope

Question 10 of 10