Mechanical Metallurgy Mock Test 3

10%

Question 1 of 10

1. The habit plane is the plane which ________________

is parallel to the principal shear stress direction

has the maximum atomic density

is parallel to the principal normal stress direction

remains unaffected during transformation

Question 1 of 10

Question 2 of 10

2. The Ashby model does not define ________________

geometrically stored dislocation

deformation of single crystal

statistically stored dislocation

deformation of polycrystal

Question 2 of 10

Question 3 of 10

3. Which of the following is not a long-range interaction about the solid solution strengthening?

Elastic interaction

Modulus interaction

Long-range order interaction

Stacking fault interaction

Question 3 of 10

Question 4 of 10

4. Which of the following method helps in avoiding stretcher strain marks in deep drawing?

Shot Peening

Coating

Skin pass rolling

Carburation

Question 4 of 10

Question 5 of 10

5. The extended dislocation formed on the basal plane of Hexagonal closed packed structure are sessile dislocation.

False

True

Question 5 of 10

Question 6 of 10

6. Hexagonal closed packed materials is generally not ductile.

True

False

Question 6 of 10

Question 7 of 10

7. The metal with strong chemical affinity tends to form a good solid solution.

False

True

Question 7 of 10

Question 8 of 10

8. The yield strength of a material is 200MPa when the grain size is 80 micron. If the frictional stress is 80MPa, find the strength when the grain diameter is 160 micron?

150MPa

100 MPa

250MPa

180 MPa

Question 8 of 10

Question 9 of 10

9. For a dislocation with burger’s vector equal to b, the strain energy per unit length is X. What will be the strain energy with burger’s vector is equal to 3b?

√3X

Question 9 of 10

Question 10 of 10

10. The interaction of two screw dislocation produces ___________

kink of screw orientation in both screw dislocations

jogs of edge orientation in both screw dislocations

jogs of screw orientation in both screw dislocations

kink of edge orientation in both screw dislocations

Question 10 of 10