1. the and property of metals increase due to cold working
Correct : C. electrical resistance, internal stresses
2. the and property of metals decrease due to cold working
Correct : D. corrosion resistance, ductility
3. the property of metals increases and property decreases due to cold working
Correct : A. hardness, electrical conductivity
4. the process by which the internal stresses are reduced in cold worked metal is called
Correct : C. heat treatment
5. the heat treatment which is used to reduce the internal stresses after cold working is called as
Correct : B. annealing
6. during recovery part of annealing treatment, which of the following properties are improved noticeably?
Correct : D. internal stresses, electrical resistance, corrosion resistance
7. during which stage of annealing there is no major change in microstructure ?
Correct : B. recovery
8. the process of formation of new grains starts by the process of
Correct : B. nucleation
9. nucleation starts at areas of
Correct : B. high energy
10. new grain formation take place in stage of annealing treatment
Correct : C. recrystalliza tion
11. after the recrystalllization stage
Correct : D. all of the above
12. during grain growth takes place
Correct : C. larger grains are formed
13. strain hardening followed by annealing is known as
Correct : B. hot working
14. there are no residual internal stresses after hot working because
Correct : C. there is simultaneou s working and recrystalliza tion
15. wire drawing is a type of
Correct : A. cold working
16. hot forging is a type of
Correct : B. hot working
17. in working of metals, the microstructure is distorted
Correct : B. cold
18. it is possible to continuosly work on metal during working
Correct : A. hot
19. cold working requires higher
than hot working
Correct : C. energy for plastic deformation
20. the possibility of oxidation is higher in case of working of metals
Correct : A. hot
21. in case of hot working of metals, there is higher possibility of
Correct : C. both a and b
22. the machinery used for hot working is than used for cold working
Correct : C. same
23. the resolved shear stress of a unit cell in nickel is N/mm2 if a tensile stress of 13.7 Mpa is applied. Take angle between the axial force and slip direction is 450 and angle between axial force and normal to slip is 540
Correct : B. 5.7
24. if resolved shear stress is maximum, it is given by
Correct : D. 0.5σt
25. at 450 the resolved shear stress is
Correct : B. maximum
26. this is type of slip systems.
Correct : A. glide
27. it is type of stacking faults
Correct : D. intrisic
28. get for burger vector
Correct : C. direction
29. is defined as fraction of volume occupied by atoms in unit cell
Correct : C. atomic packing number
30. A crystalline material must have
Correct : C. repetitive arrangement of atoms in all three direction
31. A family of directions is represented by
Correct : B. <uvw>
32. A hexagonal crystal system consists of
Correct : D. both b & c
33. A higher value of atomic packing factor number indicates
Correct : D. both b & c
34. A higher value of co-ordination number indicates
Correct : B. higher density of material
35. A material having repetitive arrangement of atoms over larger atomic distances is called
Correct : A. crystalline material
36. A non-crystalline material is characterized as having _
Correct : B. repetitive arrangement of atoms in any one direction