Quiznetik

Material Science | Set 1

1. the study of different pattern formation of atoms is called as

Correct : B. crystallography

2. crystallography is study of

Correct : C. different pattern formation of atoms

3. crystal structure is arrangement of in differeny patterns

Correct : C. atoms

4. a crystalline material must have

Correct : C. repetitive arrangement of atoms in any three direction

5. a non-crystalline material is characterized as having

Correct : B. non- repetitive arrangement of atoms in all three direction

6. a material having non repititive arrangement of atoms over larger atomic distance is called

Correct : B. non crystalline material

7. a material having repititive arrangement of atoms over larger atomic distance is called

Correct : A. crystalline material

8. examples of crystalline materials are

Correct : B. most metals

9. out of the following is non crystalline material

Correct : B. most polymers

10. Metals are type of materials

Correct : B. crystalline

11. most polymers are type of materials

Correct : A. noncrystalli ne

12. for purpose of study of crystal structures, atoms are assumed as

Correct : C. 3 dimensional spheres

13. the smallest representation of geometry of crystal structure of a material is called

Correct : B. unit cell

14. the arrengement of multiple unit cells toghether is called

Correct : B. crystal structure

15. a unit cell represents of a crystal strtucture

Correct : C. geometry

16. the represents arrangemnet of unit cells in 3 dimensional axes

Correct : C. lattice structure

17. lattice structure represents arrengement of unit cells in

Correct : B. 3 dimensional system

18. the constant distance between adjacent atoms of unit cell is called as

Correct : D. lattice constant

19. lattice constant represents

Correct : A. distance between adjacent atoms of unit cell

20. the angle between two lattice parameters of unit cell is called as -

Correct : B. lattice angle

21. lattice angle represents

Correct : C. angle between two lattice parameters of unit cell

22. crystal system classifies crystal structure according to

Correct : C. geometry of unit cell

23. the geometry of unit cell can be completely defiened by _

Correct : D. both b and c

24. a simple cubic crystal structure consists of

Correct : D. both a and c

25. A hexagonal closed pack crystal structure consists of

Correct : D. both a and b

26. indexong or designation in a unit cell can be done for a particular

Correct : D. all of the above

27. the basis of determining index values for a simple cubic structure is unit cell

Correct : B. 3 dimensional

28. circular parenthesis symbolically represents

Correct : C. crystallogra phic planes

29. square brackets symbolocally represents crystallographic -

Correct : B. crystaloogra phic directions

30. out of the following is used for reprenstation of Miller Indices for a single plane

Correct : C. ()

31. out of the following is used for reprenstation of Miller Indices for a single direction

Correct : B. []

32. in any cubic crustal structure the corner atoms shared by adjacent unit cells

Correct : D. 8

33. in face centered cubic crystal structure the face atom is shared by adjacent unit cells

Correct : B. 2

34. in body centered cubic structure the center atom is shared by adjacent unit cells

Correct : D. 0

35. in cubic crystal structure, the                        located atom is shared by 8 adjacent unit cells

Correct : C. corner

36. A higher value of average number of atoms per unit cell indicates

Correct : B. higher density of materials

37. co-ordination number is also referred to as

Correct : A. ligancy number

38. is defined as number of atoms adjacent to and touching a central atoms under consideration

Correct : A. co- ordination number

39. a higher value of coordination number indicates

Correct : B. higher density of materials

40. is defined as fraction of volume occupied by atoms in unit cell

Correct : C. atomic packing factor

41. APN is defined as

Correct : A. ratio of volume occupied by atoms in unit cell to volume of unit cell

42. a higher value of APN number indicates

Correct : D. both b and c

43. in simple cubic crystal structure there are number of corner atoms

Correct : C. 8

44. in simple cubic crystal structure there are number of face atom

Correct : D. none of the above

45. in simple cubic crystal structure there are number of center atom

Correct : D. 0

46. in simple cubic crystal structure, the average number of atoms per unit cell is

Correct : A. 1

47. in a cubic crystal structure, the average number of atoms per unit cell is 1

Correct : A. simple cubic

48. in simple cubic crystal structure, the relationsheep between lattice constant and radius of atom is given by

Correct : B. r=a/2

49. the average packing factor for simple cubic crystal is given as

Correct : A. 0.52

50. the coordination number for simple cubic structure is given as

Correct : A. 6

51. in body centred crystal structure, there is               number of corner atoms

Correct : C. 8

52. in body centred crystal structure, there is               number of face atoms

Correct : D. 0

53. in body centred crystal structure, there is                 number of center atoms

Correct : A. 1

54. in body centred crystal structure, the average number of atoms per unit cell is

Correct : B. 2

55. in a crystal structure, the average number of atoms per unit cell is 2

Correct : B. body centred

56. in body centred crystal structure, the relationship between lattice constant and radius of atom is given by

Correct : C. r=√3a/4

57. the average packing factor for body centred crystal structure is given as

Correct : B. 0.68

58. the coordination number for simple body structure is given as

Correct : B. 8

59. in a face centred crystal structure there is                     number of corner atoms

Correct : C. 8

60. in a face centred crystal structure there is                     number of face atoms

Correct : D. 6

61. in a face centred crystal structure there is                     number of centred atoms

Correct : D. 0

62. in a face centred crystal structure, the average number of atoms per unit cell is

Correct : C. 4

63. in a crystal structure, the average number of atoms per unit cell is 4

Correct : C. face centred

64. in a face centred crystal structure, the relationship between lattice constant and radius of atom is given by

Correct : D. r=a/2√2

65. the average packing factor for face centred crystal structure is given as

Correct : C. 0.74

66. the coordination number for a face centred crystal structure is given by

Correct : C. 12

67. in a hexagonal close packed crystal structure, there is number of corner atoms

Correct : D. 12

68. in a hexagonal close packed crystal structure, there is number of

Correct : A. 2

69. in a hexagonal close packed crystal structure, there is number of center atoms

Correct : D. 3

70. in a hexagonal close packed crystal structure, the average number of atoms per unit cell is

Correct : D. 6

71. in a crystal structure, the average number of atoms per unit cell is 6

Correct : D. hexagonal close packed

72. the average packing factor for hexagonal close packed crystal structure is given as

Correct : C. 0.74

73. the coordination number for a hexagonal close packed crystal structure is given as

Correct : C. 12

74. the examples of simple cubic crystal structure are

Correct : D. none of the above

75. the examples of body centred cubic structure are

Correct : A. cr, mo. fe, ta, w

76. the examples of face centred cubic structure are

Correct : C. mg, cd, zn, co, be

77. the examples of hexagonal close packed crystal structure are

Correct : A. cr, mo. fe, ta, w

78. Chromium has crystal structure

Correct : B. body centred

79. Aluminum has crystal structure

Correct : C. face centred

80. Magnesium has crystal structure

Correct : D. hexagonal close packed

81. Zinc has crystal structure

Correct : D. hexagonal close packed

82. Copper has crystal structure

Correct : C. face centred

83. Molybdenum has crystal structure

Correct : B. body centred

84. α - Fe has crystal structure

Correct : B. body centred

85. Tungsten has crystal structure

Correct : B. body centred

86. Silver has crystal structure

Correct : C. face centred

87. Lead has crystal structure

Correct : C. face centred

88. Cadmium has crystal structure

Correct : D. hexagonal close packed

89. Cobalt has crystal structure

Correct : D. hexagonal close packed

90. the correct order of packing factor for BCC, FCC, HCP is

Correct : B. 0.68,0.74,0. 74

91. the correct order of packing factor for SC, BCC, FCC is

Correct : D. 0.52, 0.68, 0.74

92. the correct order of packing factor for FCC, HCP, BCC is

Correct : B. 0.74, 0.74, 0.68

93. which of the following is not true for FCC structure

Correct : A. it has atomic packing factor of 0.52

94. which of the following is true for FCC structure

Correct : D. all of the above

95. which of the following is true for SC structure

Correct : A. it has atomic packing factor of

96. which of the following is not true for SC structure

Correct : D. none of the above

97. which of the following is true for BCC structure

Correct : B. it has no central atom

98. which of the following is not true for BCC structure

Correct : D. none of the above

99. a crystalline material has atoms in                ordered location which is

Correct : B. perfect, repetitive

100. the mechanical property of material depends on

Correct : C. crystal structure