Concept of Dislocations MCQ’s

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This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Concept of Dislocations”.

1. In which type of dislocation an extra plane is inserted inside the crystal?
a) Edge dislocation
b) Screw dislocation
c) Jog dislocation
d) Mixed dislocation

2. What is the difference between the angle of Burgers vector and dislocation line in edge dislocation and screw dislocation?
a) -90 degrees
b) 0 degrees
c) 45 degrees
d) 90 degrees

3. Edge dislocation and skew dislocation are linear crystalline defects.
a) True
b) False

4. In which type of dislocation planes are displaced relative to each other through shear?
a) Edge dislocation
b) Screw dislocation
c) Jog dislocation
d) Mixed dislocation

5. Which of the following is fields are not present for edge dislocation?
a) Tensile
b) Compressive
c) Shear stress
d) Strain

6. Which of the following dislocation can glide but not climb?
a) Screw dislocation
b) Edge dislocation
c) Jog dislocation
d) Mixed dislocation

7. In edge dislocation, a helical path is traced around the dislocation line.
a) True
b) False

8. Which of the following is fields are present for screw dislocation?
a) Tensile
b) Compressive
c) Shear stress
d) Strain

9. What is the dislocation in which the line direction and Burgers vector are neither perpendicular nor parallel?
a) Screw dislocation
b) Edge dislocation
c) Jog dislocation
d) Mixed dislocation

10. What can be the unit of dislocation density?
a) mm-2
b) mm-3
c) mm2
d) mm

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