1. <img src='./qimages/1774-1.jpg'>

<img src='./qimages/1774-1-1.jpg'>

2. The process used to introduce compressive residual stresses in near-surface regions for improving fatigue resistance

A. Electroslag remelting

B. Sand casting

C. Mechanical alloying

D. Laser shock peening

3. The fabrication step of mechanical grinding in nano science and technology is considered as an approach of

A. Bottom up

B. Top down

C. Middle up

D. Middle down

4. Equi channel angular pressing is

A. A Severe plastic deformation technique for producing ultrafine grained structures

B. A metal forming process for shaping flat sheets into cup shaped articles

C. A metal forming process to produce square shaped grooves

D. A method to produce coarse grain materials


5. Buckminster fullerene, a spherical molecule with the formula of C60 comprises of

A. 12 pentagons and 20 hexagons

B. 10 pentagons and 20 hexagons

C. 12 pentagons and 18 hexagons

D. 14 pentagons and 18 hexagons

6. Mechanical alloying is a process in which grain refinement occurs

A. By mixing of metals in a liquid state

B. By alloyirig molten liquid by Aluminium

C. Due to co-precipitation in a chemical process

D. By repeated deformation, fracturing and cold welding of powder particles in a ball mill

7. Giant Magneto Resistance is

A. Resistance of a thin film structure to mechanical deformation

B. Resistance of a thin film structure to chemical degradation

C. A quantum mechanical phenomenon occurring in a multilayered thin film structure

D. A classical mechanical phenomenon occurring in a multilayered thin film structure

8. A sintering technique using pulsed DC current that directly passes through graphite dye and powder to be consolidated in case of conductive samples

A. Spark plasma sintering

B. Activated sintering

C. Liquid phase sintering

D. Microwave sintering

9. Polygonization is the phenomenon where

A. Dislocations disappear into grain boundaries,

B. Mobile dislocations present in the material are rearranged in cell walls

C. Dislocations are generated by the operation of Frank-Read sources

D. Dislocations form tangles

10. Ultimate tensile strength is given by

A. Yield load/original area of cross section

B. Yield load/instantaneous area of cross section

C. Maximum load/instantaneous area of cross section

D. Maximum load/original area of cross section

11. An example of line defects in crystals

A. Dislocations

B. Vacancies

C. Stacking faults

D. Interstitials

12. Fermi level of a metal defines

A. The lowest occupied level of electron energies at absolute zero

B. The highest occupied level of electron energies at room temperature

C. The highest occupied level of electron energies at absolute zero

D. The band gap in an intrinsic semi-conductor

13. In Hall-Petch equation, alpha y alphai+kd-1/2,the relative hardening contribution of the grain boundaries is described by

A. k,locking parameter

B. d,grain diameter

C. alphay,yield stress

D. alphai,Frictional stress

14. Directional solidification can be used to produce

A. Shape memory alloys

B. Fuel clad tubes for nuclear reactors

C. Materials for railway axles

D. Turbine blades for gas turbine engines


15. The lowest density in a powder metallurgy product is its

A. Green density

B. Theoretical density

C. Sintered density

D. Smear density

16. Grain boundary sliding is promoted by

A. Elevated temperatures and low strain rate

B. Elevated temperatures and high strain rate

C. Sub zero temperatures and low strain rate

D. Ambient temperature and high strain rate

17. Which of the following is a semiconductor material?

A. Ge

B. CdS

C. GaP

D. All the above

18. Approximate boiling temperature of liquid nitrogen at STP conditions is

A. 273K

B. 77 K

C. 4.2K

D. 10K

19. One of the following is an inert gas electron configuration

A. 1s2 2s2 2p1

B. 1s2 2s2 2p6

C. 1s2 2s2 2p6 3s2 3p2

D. 1s2 2S1

20. Primitive cell of face centered cubic structure containS the following number of atoms

A. 4

B. 2

C. 1

D. 3

21. For materials with uniform grain size distribution, the ASTM grain size is derived from the equation, n=2N-1 where n is the number of grains/inch2. During microscopic examination, the ASTM index is determined from the observations made at a magnification of

A. 10X

B. 100X

C. l000X

D. l000X

22. A positive edge dislocation can be visualized as

A. Displacement of atoms from normal lattice positions into interstitial sites

B. As closed· vacancy [oops in the crystal

C. Insertion of extra half plane of atoms above the dislocation line

D. Insertion of extra half plane of atoms below the dislocation line

23. Expansion of occurs during heating due to

A. Only due to increase in lattice vibration amplitude

B. Increase in lattice vibration amplitude and increase in vacancy concentration

C. Increase in vacancy concentration

D. Annihilation of vacancies

24. The following material shows well defined fatigue limit

A. Mild steel

B. Aluminum

C. Alumina

D. Copper

25. Oxide dispersion strengthened alloys are generally produced by

A. Investment casting

B. Electroslag remelting

C. Rheocasting

D. Mechanical alloying


26. The following elements contribute mainly to grain boundary strengthening in Ni base superalloys

A. Aluminum, Titanium, Niobium

B. Carbon, Boron, Zirconium

C. Chromium, Aluminum

D. Chromium, Molybdenum, Tungsten

27. The surface hardening process used for coating or cladding of a substrate for the purpose of reducing surface damage

A. Hardfacing

B. Carburizing

C. Flame hardening

D. Induction hardening

28. The product of complex number and

A. -4+20i

B. 6+l0i

C. -2+24i

D. 2+24i

29. Cottrell atmosphere is associated with

A. Grain boundary shear

B. Formation of vacancy loops

C. Formation of slip band intrusion and extrusion

D. Yield point phenomenon

30. The S-N curve in low cycle fatigue region is described by

A. Goodman's relation

B. Coffin-Manson relationship

C. Basquin equation

D. Soderberg equation

31. During primary creep

A. Creep resistance of the material increases by virtue of its own deformation

B. A balance between strain hardening and recovery process takes place

C. Internal void formation occurs

D. Recrystallization or diffusional changes in the phases occur

32. Residual stresses are

A. Stresses above offset yield strength

B. Elastic stresses

C. Close to ultimate tensile strength

D. Close to true fracture stress

33. The usage of failed tensile test samples is mandatory to evaluate the following:

A. Yield strength and ultimate tensile strength

B. Ductility and percentage reduction area

C. Fracture strength and ultimate tensile strength

D. Elastic modulus and proportional limit

34. Peritectic reaction is given by:

A. Liquid+Solid1 Solid2

B. Liquid1+Liquid2 Liquid3

C. Solid1+Solid2 Liquid

D. Solid1+Solid2 Solid3

35. Millipede, a memory device based on a mechanical storage method uses an array of microcantilevers to create pattern of nanoindentation in a

A. Polymer medium

B. Molten salts

C. Molten metal

D. None of the above


36. Peak strengthening in age hardening Al-Cu alloys is derived from

A. Formation of coherent precipitate platelets of CuAl2

B. The occurrence of an equilibrium phase CuAl2

C. Ordering of copper atoms on planes of matrix

D. Local clustering of copper atoms

37. The nuclear fuel in pressurized heavy water reactors in India is

A. Oxides of Thorium and Plutonium

B. Plutonium oxide

C. Natural Uranium oxide

D. Enriched U235

38. In fusion reactor based on the concept of magnetic confinement of plasma isotopes of the following are used for energy generation

A. Plutonium

B. Thorium

C. Uranium

D. Hydrogen

39. The following alloys are used as electrodes for resistance welding

A. Cu-Cr

B. Al-Si

C. Cu-Zn

D. Sb-Sn

40. The following is correct in case of nano crystalline materials with respect to those of conventional grain size

A. The melting point is high

B. The grain boundary specific area is more

C. The density is high

D. The weight is more

41. Diffusion flux has the units of

A. No.of atoms/(area.time)

B. No.of atoms/(volume.time)

C. No.of atoms/(length.time)

D. No.of atoms/(mass.time)

42. Tabling process is unit operation for extraction of

A. Lead

B. Silicon

C. Gold

D. Copper

43. For a closed system of fixed internal energy and volume, at equilibrium

A. Gibbs free energy is minimum

B. Enthalpy is maximum

C. Helmoltz's free energy is minimum

D. Entropy is maximum

44. In the limit <img src='./qimages/1774-44.jpg'>

A. 2

B. 0

C. 1/2

D. does not exist

45. The included angle between the opposite faces of diamond pyramid indenter used in Vicker's hardness test is

A. 180°

B. 136°

C. 90°

D. 0°

46. Cold working of a metallic material is carried out

A. At its recrystallization temperature

B. Below brittle to ductile transition temperature

C. Above its recrystallization temperature

D. Below its recrystallization temperature

47. Tetragonal phase ZrO2 can be stabilized down to room temperature by adding a small amount of

A. Sn

B. Be

C. Y2O3

D. La

48. Magnetically hard ferrites used for loud speakers, telephone ringers and receivers have the general formula MO.6Fe2O3 where M is usually

A. Ba or Sr ion

B. Fe,Mn or Ni ion

C. FeorSiion

D. None of the above

49. The metallic materials that are widely being used for hip joints in human body are

A. Niobium alloys

B. Copper alloys

C. Mild steel

D. Titanium alloys

50. The condensed phase rule is represented by

A.

B.

C.

D.

51. The following has the highest co-efficient of thermal expansion

A. Plastics

B. Ceramics

C. Tungsten

D. Tin

52. Curie temperature is a useful concept for

A. Ferro-magnetic material

B. Super plastic material

C. Ferro-elastic material

D. Dielectric material

53. Zinc has even number of electrons in the outer shell and a full valence band, therefore

A. Zinc is an insulator

B. Zinc is a semi-conductor

C. Zinc is a conductor

D. None of the above

54. The neutron capture cross-section is customarily measure in barns. 1 barn equals to

A. 10 power-28 m2

B. 10 power-27 m2

C. 10 power-26 m2

D. 10 power-25 m2

55. A small portion of In is incorporated ill a Ge crystal. Ge crystal is now

A. A conductor

B. An insulator

C. A n-type semiconductor

D. A p-type semiconductor

56. For continuous machining applications the following tool materials are primarily used

A. High speed steel

B. Cast cobalt alloy

C. Cementite carbides

D. None of the above

57. The improvement in high cycle fatigue resistance of steel is obtained by having

A. Surface decarburization

B. Fine grain size

C. Tensile residual stresses on surface

D. Presence of globular inclusions of oxides

58. Refinement of grain size in Magnesium alloys is carried out by the addition of

A. Manganese

B. Zinc

C. Zirconium

D. Cerium

59. Top-down approach is generally employed

A. To activate the particles without altering the particle size of powders

B. For increasing the particle size of powders

C. For reducing the particle size of powders

D. None of the above

60. Differential Scanning Calorimetry is used for the determination of

A. Phase transformations

B. Surface topography

C. Co-efficient of thermal expansion

D. Grain boundary chemical analysis

61. A very large Reynold's number is an indication of

A. Laminar flow

B. High turbulent flow

C. Smooth and streamline flow

D. None of the above

62. The point defects strengthen metals and decrease their ductility by

A. Impeding the motion of dislocation

B. Promoting ionic bonding

C. Promoting covalent bonding

D. Increasing the density of metal

63. A free radical can be best detected by

A. Electron Spin Resonance

B. Nuclear Magnetic Resonance

C. Infrared Spectroscopy

D. Nuclear Quadrapole Resonance

64. Which of the following statements is true?

A. Reaction temperatures in plasma enhanced chemical vapor deposition are greater than in thermal chemical vapor deposition

B. Reaction temperatures in plasma enhanced chemical vapor deposition are less than in thermal chemical vapor deposition

C. Reaction temperatures in plasma enhanced chemical vapor deposition are equal to those in thermal chemical vapor deposition

D. None of the above

65. The following technique has the ability to carry out precise and controlled manipulation of atoms, molecules and nano structures

A. X-ray photoelectron spectroscopy

B. High resolution transmission electron microscope

C. Scanning Tunneling Microscopy

D. Optical microscopy

66. The relationship between Young's modulus modulus of rigidity and Poisson's ratio is

<img src='./qimages/1774-66.jpg'>

67. The energy of neutrons that cause fission in thermal nuclear reactors is

A. 14 MeV

B. 25 keV

C. 0.25 eV

D. >0.1 MeV

68. Presence of super-lattice line/peak in an x-ray diffractogram of a solid indicates the presence of

A. Nucleation of precipicates

B. Long range ordering

C. Immiscibility of alloying elements

D. averaged precipitates

69. The total area under stress-strain curve represents

A. Fracture strength

B. Malleability

C. Toughness

D. Resilience

70. The term diamond-like-carbon is most commonly used to refer to

A. Graphene layers

B. Amorphous carbon thin films

C. Crystalline diamond composites

D. All of the above

71. Sensitization in stainless steels is associated with

A. Depletion of Carbon to less than 0.2% at grain boundaries

B. Depletion of Chromium to less than 12% at grain boundaries

C. Depletion of Nickel to less than at grain boundaries

D. Depletion of Titanium to less than 0.5% at grain boundaries

72. In the superconducting state, the electrical resistivity of a material is

A. One tenth its normal value

B. Ten times the normal value

C. Zero

D. Unaltered

73. Perspex is a

A. Metal

B. Ceramic

C. Gas

D. Polymeric material

74. A material with zero co-efficient of thermal expansion is

A. Invar

B. Nd-B compound

C. Tungsten

D. Celluloid

75. Energy gap of Germanium at room temperature is

A. 5.0 eV

B. 1.5 eV

C. 1.1 eV

D. 0.7 eV