MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Surface decarburisation in steels in cold working . |
| A. | does not occurs |
| B. | occurs |
| Answer» B. occurs | |
| 2. |
Stacking fault is type of defect |
| A. | point |
| B. | line |
| C. | volume |
| D. | surface |
| Answer» E. | |
| 3. |
Stacking fault energies are in the range of |
| A. | 0.01-0.1 j/m2 |
| B. | 0.01-0.1 j/cm2 |
| C. | 0.1-10 j/m2 |
| D. | 0.1-10 j/m2 |
| Answer» B. 0.01-0.1 j/cm2 | |
| 4. |
Square brackets are used to represent crystallographic |
| A. | point location |
| B. | direction |
| C. | plane |
| D. | none of the above |
| Answer» C. plane | |
| 5. |
slip plane orientation after grain boundary |
| A. | by pass |
| B. | crosses |
| C. | change |
| D. | none of the above |
| Answer» D. none of the above | |
| 6. |
Slip systems having two types one is glide & another one is |
| A. | climb |
| B. | slip |
| C. | twinns |
| D. | none of the above |
| Answer» B. slip | |
| 7. |
Sharp break in dislocation line that is in slip plane . |
| A. | jog |
| B. | kink |
| C. | either jog or kink |
| D. | none |
| Answer» C. either jog or kink | |
| 8. |
screw dislocations includes |
| A. | tension lattice strain |
| B. | compression lattice strain |
| C. | shear lattice strain |
| D. | all |
| Answer» D. all | |
| 9. |
screw dislocations have burger vector for dislocation line |
| A. | perpendicul ar |
| B. | parallel |
| C. | inclined |
| D. | first perpendicul ar then parallel |
| Answer» B. parallel | |
| 10. |
Schottky-defect in ceramic material is |
| A. | interstitial impurity |
| B. | vacancy- interstitial pair of cations |
| C. | pair of nearby cation and anion vacancies |
| D. | substitution al impurity |
| Answer» D. substitution al impurity | |
| 11. |
Schottky-defect is of this type. |
| A. | point |
| B. | line |
| C. | volume |
| D. | surface |
| Answer» B. line | |
| 12. |
Schottky defect found in |
| A. | metal |
| B. | non-metal |
| C. | ionic |
| D. | plastics |
| Answer» D. plastics | |
| 13. |
Schottky defect have missing of |
| A. | cation |
| B. | anion |
| C. | electron |
| D. | both a&b |
| Answer» E. | |
| 14. |
Recrystallization rate varies in the following manner with temperature |
| A. | linearly increasing |
| B. | linearly decreasing |
| C. | exponential |
| D. | logarithmic |
| Answer» D. logarithmic | |
| 15. |
Repeatable entity of a crystal structure is known as |
| A. | crystal |
| B. | lattice |
| C. | unit cell |
| D. | miller indices |
| Answer» D. miller indices | |
| 16. |
Requirement for cross-slip movement of dislocation |
| A. | preferred slip plane |
| B. | preferred slip direction |
| C. | no preferred slip plane |
| D. | no preferred slip direction |
| Answer» D. no preferred slip direction | |
| 17. |
Round brackets are used to represent crystallographic |
| A. | point location |
| B. | direction |
| C. | plane |
| D. | none of the above |
| Answer» D. none of the above | |
| 18. |
Recrystallisation temperature of Iron is ……….. |
| A. | 727 °c |
| B. | 775 °c |
| C. | 800 °c |
| D. | 700 °c |
| Answer» B. 775 °c | |
| 19. |
Positive screw dislocation is represented by |
| A. | â”´ |
| B. | 0 |
| C. | ┬ |
| Answer» B. 0 | |
| 20. |
Oxidation of metals occurs during cold working. |
| A. | true |
| B. | false |
| Answer» C. | |
| 21. |
Poor surface finish in………process |
| A. | cold working |
| B. | hot working |
| C. | casting |
| D. | welding |
| Answer» C. casting | |
| 22. |
Plastic deformation results from the following. |
| A. | edge dislocation |
| B. | screw dislocations |
| C. | mixed dislocations |
| D. | all of the above |
| Answer» E. | |
| 23. |
No.of atoms in FCCstructure are ….. |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 24. |
No. of atoms in Body-Centered Cubic structure are ….. |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 25. |
No. of atoms in hexagon close packed structure are ….. |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» E. | |
| 26. |
Minimum number of slip systems that must be operative during plastic deformation |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» D. 6 | |
| 27. |
Miller indices of the line of intersection of (⎯ 1⎯ 11) and (110) are |
| A. | [110] |
| B. | [101] |
| C. | [10-1] |
| D. | [-110] |
| Answer» E. | |
| 28. |
Material having CRSS shows large plastic deformation |
| A. | high |
| B. | low |
| C. | constant |
| D. | none of the above |
| Answer» C. constant | |
| 29. |
Material having cohesive strength shows large plastic deformation |
| A. | high |
| B. | low |
| C. | constant |
| D. | none of the above |
| Answer» B. low | |
| 30. |
Ligancy number for HCP is |
| A. | 6 |
| B. | 12 |
| C. | 4 |
| D. | 8 |
| Answer» C. 4 | |
| 31. |
Lattice structure represents arrangement of unit cells in |
| A. | 2- dimensional axes system |
| B. | 3- dimensional axes system |
| C. | orthographi c system |
| D. | none of the above |
| Answer» C. orthographi c system | |
| 32. |
It is a type of Twin |
| A. | annealing |
| B. | tempering |
| C. | normalising |
| D. | hardening |
| Answer» B. tempering | |
| 33. |
Inter atomic distance is more                   the dislocation line in negative edge dislocation |
| A. | above |
| B. | below |
| C. | right side of |
| D. | left side of |
| Answer» B. below | |
| 34. |
In vacancy point defects, stress field produced in the vicinity. |
| A. | tension |
| B. | shear |
| C. | compression |
| D. | all |
| Answer» B. shear | |
| 35. |
In hot working microstructure is |
| A. | distorted |
| B. | equiaxed |
| C. | refined |
| D. | both b & c |
| Answer» E. | |
| 36. |
Inter atomic distance is more                   the dislocation line in positive edge dislocation |
| A. | above |
| B. | below |
| C. | right side of |
| D. | left side of |
| Answer» C. right side of | |
| 37. |
Indexing or designation in a unit cell can be done for a particular |
| A. | point location |
| B. | direction |
| C. | plane |
| D. | all of the above |
| Answer» E. | |
| 38. |
In hot working force required is than cold working |
| A. | greater |
| B. | less |
| C. | equal |
| D. | can’t say |
| Answer» C. equal | |
| 39. |
In geometrical softening, at the beginning λ is |
| A. | less than 45° |
| B. | more than 35° |
| C. | more than 45° |
| D. | less than 35° |
| Answer» C. more than 45° | |
| 40. |
In geometrical hardening, at the beginning λ is |
| A. | less than 45° |
| B. | more than 35° |
| C. | more than 45° |
| D. | less than 35° |
| Answer» B. more than 35° | |
| 41. |
In FCC, the lattice parameter (a) is |
| A. | (4/√3) r |
| B. | 4/√3 r |
| C. | (4/√2) r |
| D. | 4/√2 r |
| Answer» D. 4/√2 r | |
| 42. |
In Cold work,strength |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | none |
| Answer» B. decreases | |
| 43. |
In cold working, due to strain hardening ductility of metal |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» C. remains same | |
| 44. |
In cold working, electrical resistance |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» B. decreases | |
| 45. |
In cold working, corrosion resistance |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» C. remains same | |
| 46. |
In climb, the dislocation moves of the surface |
| A. | in , glide |
| B. | out, glide |
| C. | in, twinns |
| D. | out, twinns |
| Answer» C. in, twinns | |
| 47. |
In case of polycrystalline materials regeneration rate of dislocations |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | can’t say |
| Answer» B. decreases | |
| 48. |
In BCC, the lattice parameter (a) is |
| A. | (4/√3) r |
| B. | 4/√3 r |
| C. | (4/√2) r |
| D. | 4/√2 r |
| Answer» B. 4/√3 r | |
| 49. |
If the deformation is carried out below RCT, it is |
| A. | cold working |
| B. | hot working |
| C. | both a and b |
| D. | none |
| Answer» B. hot working | |
| 50. |
If the deformation is carried out above RCT, it is |
| A. | cold working |
| B. | hot working |
| C. | both a and b |
| D. | none |
| Answer» C. both a and b | |