Ductility of a material can be defined as

ability to undergo large permanent deformations in tension

ability to undergo large permanent deformations in compression

ability to recover its original form

ability to undergo large permanent deformations in tension

Malleability of a material can be defined as

ability to undergo large permanent deformations in compression

ability to recover its original form

ability to undergo large permanent deformations in tension

In compression, a prism of brittle material will break

in direction perpendicular to application of load

by forming a bulge (l>) by shearing along oblique plane

in direction perpendicular to application of load

by crushing into thousands of pieces

The ultimate tensile strength of low carbon steel by working at a high strain rate will

first increase and then decrease

first decrease and then increase.

The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00°C will

first increase and then decrease

Stress relaxation is- the phenomenon

in which deformation tends to loosen the joint and produces a stress reduced

in which stress remains constant on in-creasing load

in which deformation tends to loosen the joint and produces a stress reduced

stress reduces on increasing load

Isotropic materials are those which have the same

elastic properties in all directions

stresses induced in all directions

thermal properties in all directions

electric and magnetic properties in all directions

Recrystallization temperature is one

at which new spherical crystals first begin to form from the old deformed one when a strained metal is heated

at which crystals first start forming from molten metal when it is cooled

at which new spherical crystals first begin to form from the old deformed one when a strained metal is heated

at which change of allotropic form takes place

at which crystals grow bigger in size

at which crystals are destroyed on heating.

Points of arrest for iron correspond to

stages at which allotropic forms change

stages at which further heating does not increase temperature for some time

stages at which properties do not change with increase in temperature

there is nothing like points of arrest

A material is known as allotropic or polymorphic if it

exists in several crystal forms at different temperatures

has a fixed structure under all conditions

exists in several crystal forms at different temperatures

has its atoms distributed in a random pattern

Which of the following represents the allotropic forms of iron

alpha iron, gamma from and delta iron

alpha iron, beta iron and gamma iron

body centred cubic a-iron and face centred cubic a-iron

alpha iron, gamma from and delta iron

The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

below recrystallisation temperature

above recrystallization temperature.

The molecules in a solid move

back and forth like tiny pendulums

For the allotropic forms of iron, the points of arrest are

the points where no further change oc-curs

the points where there is no further flow of metal

the points where major changes take place.

Pig iron is the name given to

product of blast furnace made by reduction of iron ore

iron containing huge quantities of carbon

iron in molten form in the ladles

In grey cast iron, carbon is present in the form of

nodular aggregates of graphite.

In nodular iron, graphite is in the form of (C) flakes

nodular aggregates of graphite.

In malleable iron, carbon is present in the form of

nodular aggregates of graphite.

heat treated to change its properties

Pick up wrong statement about wrought iron

It is made by adding suitable percent¬age of carbon to molten iron and subjecting the product to repeated hammering and rolling.

It contains carbon of the order of 0 to 0.25%

It is made by adding suitable percent¬age of carbon to molten iron and subjecting the product to repeated hammering and rolling.

Chilled cast iron has

a very high percentage of graphite

graphite as its basic constituent of composition

its elastic limit close to the ultimate breaking strength

In mottled cast iron, carbon is available in

partly in free and partly in combined state.

alloying elements like chromium, tungsten nickel and copper

elements like phosphorus, sulphur and silicon in varying quantities

Engineering Materials MCQ Interview Questions and Answers Quiz

133.

. Malleable cast iron

contains l.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron

is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

is produced by annealing process. It is soft, tough, and easily machined metal

is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

none of the above.

1. Ductility of a material can be defined as

2. Malleability of a material can be defined as

3. In compression, a prism of brittle material will break

4. The ability of a material to resist softening at high temperature is known as

5. Mild steel belongs to the following category

6. The ultimate tensile strength of low carbon steel by working at a high strain rate will

7. Slow plastic defomiation of metals under a constant stress is known as

8. The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00°C will

9. The number of electrons in 1 cm3 of metal would be of the order of

10. Stress relaxation is- the phenomenon

11. The elastic stress strain behaviour of rubber is

12. Isotropic materials are those which have the same

13. Recrystallization temperature is one

14. Points of arrest for iron correspond to

15. Delta iron occurs at temperature of

16. A material is known as allotropic or polymorphic if it

17. Super conduction by metals is observed in the temperature range of

18. Which of the following constituents of steels is softest and least strong

19. Which of the following represents the allotropic forms of iron

20. The following types of materials are usually the most ductile

21. Pure iron is the structure of

22. The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

23. Gamma iron exits at following temperature

24. Ferromagnetic alpha iron exists in temperature range of

25. Paramagnetic alpha iron changes to gamma iron at

26. A reversible change in the atomic structure of steel with corresponding change in the properties is known as

27. The molecules in a solid move

28. The crystal structure of gamma iron is

29. The crystal of alpha iron is

30. The metallic structure of mild steel is

31. For the allotropic forms of iron, the points of arrest are

32. The percentage of carbon in pig iron varies from

33. The percentage of carbon in grey iron castings usually varies between

34. Pig iron is the name given to

35. The unique property of cast iron is its high

36. Cast iron is characterised by minimum of following %age of carbon

37. In grey cast iron, carbon is present in the form of

38. In nodular iron, graphite is in the form of (C) flakes

39. In malleable iron, carbon is present in the form of

40. Wrought iron is

41. Sulphur in pig iron tends to make it

42. Pick up wrong statement about wrought iron

43. Iron is

44. A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

45. Chilled cast iron has

46. Cast iron has

47. White cast iron contains carbon in the form of

48. In mottled cast iron, carbon is available in

49. An important property of high silicon (12 – 18%) cast iron is the high

50. An important property of malleable cast iron in comparison to grey cast iron is the high

51. Steel contains

52. Carbon steel is

53. Annealing of white cast iron results in production of

54. ‘Killed steels’ are those steels

55. Hardness of steel depends on

56. Maximum percentage of carbon in ferrite is

57. Maximum percentage of carbon in austenite is

58. Corrosion resistance of steel is increased by addition of

59. In which of the following cases, consideration of creep is important

60. The most effective inhibitor of grain growth, when added in small quantities is

61. Depth of hardness of steel is increased by addition of

62. Railway rails are normally made of

63. Pick up the wrong statement

64. Pick up the wrong statement Nickel and chromium in steel help in

65. Machining properties of steel are improved by adding

66. Eutectoid steel contains following percentage of carbon

67. The basic constituents of Hastelloy are

68. Basic constituents of Monel metal are

69. German silver is an alloy of

70. Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

71. A cold chisel is made of

72. An engineer’s hammer is made of

73. Inconel is an alloy of

74. By severely deforming a metal in a particular direction it becomes

75. Solder is an alloy consisting of

76. Cyaniding is the process of

77. Induction hardening is the process of

78. The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as

79. Process of austempering results in

80. The surface hardness of the following order is achieved by nitriding operation

1.

Ductility of a material can be defined as

2.

Malleability of a material can be defined as

3.

In compression, a prism of brittle material will break

4.

The ability of a material to resist softening at high temperature is known as

5.

Mild steel belongs to the following category

6.

The ultimate tensile strength of low carbon steel by working at a high strain rate will

7.

Slow plastic defomiation of metals under a constant stress is known as

8.

The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00°C will

9.

The number of electrons in 1 cm3 of metal would be of the order of

10.

Stress relaxation is- the phenomenon

11.

The elastic stress strain behaviour of rubber is

12.

Isotropic materials are those which have the same

13.

Recrystallization temperature is one

14.

Points of arrest for iron correspond to

15.

Delta iron occurs at temperature of

16.

A material is known as allotropic or polymorphic if it

17.

Super conduction by metals is observed in the temperature range of

18.

Which of the following constituents of steels is softest and least strong

19.

Which of the following represents the allotropic forms of iron

20.

The following types of materials are usually the most ductile

21.

Pure iron is the structure of

22.

The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

23.

Gamma iron exits at following temperature

24.

Ferromagnetic alpha iron exists in temperature range of

25.

Paramagnetic alpha iron changes to gamma iron at

26.

A reversible change in the atomic structure of steel with corresponding change in the properties is known as

27.

The molecules in a solid move

28.

The crystal structure of gamma iron is

29.

The crystal of alpha iron is

30.

The metallic structure of mild steel is

31.

For the allotropic forms of iron, the points of arrest are

32.

The percentage of carbon in pig iron varies from

33.

The percentage of carbon in grey iron castings usually varies between

34.

Pig iron is the name given to

35.

The unique property of cast iron is its high

36.

Cast iron is characterised by minimum of following %age of carbon

37.

In grey cast iron, carbon is present in the form of

38.

In nodular iron, graphite is in the form of (C) flakes

39.

In malleable iron, carbon is present in the form of

40.

Wrought iron is

41.

Sulphur in pig iron tends to make it

42.

Pick up wrong statement about wrought iron

43.

Iron is

44.

A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

45.

Chilled cast iron has

46.

Cast iron has

47.

White cast iron contains carbon in the form of

48.

In mottled cast iron, carbon is available in

49.

An important property of high silicon (12 – 18%) cast iron is the high

50.

An important property of malleable cast iron in comparison to grey cast iron is the high

51.

Steel contains

52.

Carbon steel is

53.

Annealing of white cast iron results in production of

54.

‘Killed steels’ are those steels

55.

Hardness of steel depends on

56.

Maximum percentage of carbon in ferrite is

57.

Maximum percentage of carbon in austenite is

58.

Corrosion resistance of steel is increased by addition of

59.

In which of the following cases, consideration of creep is important

60.

The most effective inhibitor of grain growth, when added in small quantities is

61.

Depth of hardness of steel is increased by addition of

62.

Railway rails are normally made of

63.

Pick up the wrong statement

64.

Pick up the wrong statement Nickel and chromium in steel help in

65.

Machining properties of steel are improved by adding

66.

Eutectoid steel contains following percentage of carbon

67.

The basic constituents of Hastelloy are

68.

Basic constituents of Monel metal are

69.

German silver is an alloy of

70.

Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

71.

A cold chisel is made of

72.

An engineer’s hammer is made of

73.

Inconel is an alloy of

74.

By severely deforming a metal in a particular direction it becomes

75.

Solder is an alloy consisting of

76.

Cyaniding is the process of

77.

Induction hardening is the process of

78.

The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as

79.

Process of austempering results in

80.

The surface hardness of the following order is achieved by nitriding operation