ENTRANCE EXAMINAnONS, JUNE 2011
QUESTION PAPER

Integrated M.Tech./Ph.D. and Ph.D. (Materials Engineering)
Marks: 75
Timc: 2.00 hrs Hall ricket no:

I. Write your Booklet Code and Hall Tickct Number on thc OMR Answer Sheet given to you. Also write the Hall Ticket Number in the Space provided abovc.
U. Read the following instructions carefully before answering the questions.
III.
This Question paper has TWO parts: PART and PART

I.
It consists of25 objective type questions of one mark each. Tb.re is a neg.tiv. m.rking of 0.33 m.rks for ev.ry wrong .n....r. The marks obtained by a candidate in this pan will be used for resolving tie eases.


2.
P.rt It consists of 50 objective questions of one mark each. There is no negative marking in this pan.

3.
AU questions.re to be .ns...red. Answers for these questions arc to be entered on the OMR sbeet, filling the appropriate cirele against each question. For example. if the answer to a question is it should be marked as below:


No additional sheets will be provided. Rough work can be done in the question paper
itself and rough work sheets provided at the end of the booklet.

4.
Hand over both the question paper booklet and the OMR answer sheet at the end of the examination.

5.
Calculators are permitted. Log tables are not allowed. Mobil. pbones .re not permitted inside tb. Examination HaU.

6.
This book contains 18 pages including this cover sheet.



PART

I. The Heisenberg llIICCrtaioty principle says that the product is
A. 0
B. h/411
C. S h/411
D. h where h is the Planck's constant
2. The Joule-Thompson coefficient for an ideal gas is
A. Zero
B. P""itive
C. Negative
D. Either positive or negative
3. Nodular Cast Iron is
A. From White Cast Iron by heat treatment
B. By inoculation ofeast iron melt
C. By hot working Grey Cast Iron
D. By cold working ofnodular cast iron
4. Progressive accumulation ofdamage ofa material under cyclic loading conditions is called as
A. Fatigue
B. Ductility
C. Creep
D. Malleability
5. Hexagonal Closed Packed materials will have the following stacking sequence:
A. ABABABABAB .
B. ABCABCABCABC .
C. ABCABCACBCAB .
D. ABABBAABAABBA .




6. Zone Refining is:
A. A process ofpurifying metals
B. Estimating grain orientation
C. Estimating velocity ofa rocket
D. Evwuating the exact composition of a substance
7. The steel making process that uses oxygen lancing ofmcIt is


A. LD
B. Open Hearth

C. Bessemer convenor
D. Cupola
8. The phenomenon of a metal existing more than in one crystalline form is known as
A. Amorphous
B. Allotropy
C. Isomorphism
D. Condensation
9. Under equilibrium cooling conditions. the solidification of pure iron from the liquid occurs at
A. I130°C
B. 910°C
C. 1492°C
D. 1540°C
10. The combination of planes and on which slip takes place in metallic materials is known as
A. Slip system
B. Kinks
C. Dislocation channeling
D. Jogs
II. The number of electrons present in the outer shell of the noblc gases Neon and Argon
A. 3
B. 5
C. 7
D.8
3
12. Ifthe coordination numbers oftwo unit cells are same, they both will bave similar
A. Atomie weight
B. Ductility
C. Packing fllClOr
D. Crystal structure
13. The point defects strengthen metals and decrease their ductility by
A. Promoting covalent bonding
B. Promoting ionic bonding
C. Impeding the motion ofdislocations
D. Increasing the density of metal
14. Bohr radius ofthe flrSl electron orbit ofa Hydrogen atom is
A. 5.3 x em
B. 5.3 x 10.7 em
C. 5.3x 10"em
D. 5.3 x 10'11 em
15. Solar cells are basically
A. Photoconductive
B. Photoemissivc
C. Photovoltaic
D. Photorcsistive
16. Soli iron is used in many pans ofelectrical machines for
A. Low hysteresis loss and low permeability
B. Low hysteresis loss and high permeability
C. High hysteresis loss and low permeability
D. High hysteresis loss and high permeability
17. A very large Reynolds' number is an indication of
A. High turbulent flow
B. Laminar flow
C. Smooth and streamline flow
D. None ofthe above
18. A fiee radical can be best detected by
A. Nuclear Magnetic Resonance
B. Nuclear Quadrapole Resonance
C. Electron Spin Resonance
O. Infnued Spectroscopy
19. Quenching ofplain carbon steel is a process that
A. Softens the material
B. Produces Pearlite
C. HanlCDS the material
D. Spherodizes the carbides
20. A radioactive nucleus of type I decays exponentially with a decay constant ..1, to stable nucleus oftype ifat time the number oftype 1 and 2 nuclei &Ie respectivcly a Noand whal is the number oftype 2 nucleus present at time
A. No exp-..1,1
B. No{l-exp-..1,I)
C.
O. 1-No exp-..1,1
21 . If IxIstands for largest integer not exceeding x. the integral
equals,
A.3
B.O

C.
I


0.2





22. The matrix I 3 has
A. No independent eigenvectors
B. 1 independent eigenvector
C. 2 independent eigenvectors
O. 3 independent eigenvectors
23. Resolution ofa scanning electron microscope is deh:nnincd by the
A. Wavelength ofthe elechno beam
B. Objective lens
C. Condenser lens
D. Beam size
24. The Miller indices ofthe diagonal plane ofa cube are
A.(IIO)
B.
C.
0.(111)

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

B.
C. u-2E1
D. E3'1
PART

26. "Thennodynamic death" is suggested by
A. The fullt law ofthennodynamics,
B. The second law ofthennodynamics
C. The third law ofthermodynamics
D. Zeroeth law ofthermodynamics
27. Il-brass, CuZn is
A. An electron compound
B. A size factor compound
C. An electrochemical compound
D. An intennetallic compound
2M. The Czochralski apparatus can be used to produce
A. Polycrystals of silicon
B. Single crystal ingots
C. High temperature ceramics
D. Steels for eryogenic applications
29. The prime funetion ofa eutting fluid is
A. To decrease friction. wear and heat generation in the cuning region
B. To quench the tool during cutting to make it hard by phasc transfonnation
C. To impart eolour to the surfaee ofthc part being machined
D. To corrode the newly machined surface
30 The improvement in high cycle fatigue resistance ofsteel is obtained by having
A. Fine grain size
B. Surface decarburization
C. Tensile residual stresses on surface
D. Presence of globular inclusions of oxides
A. Superconductor
B. Semiconductor
C. Soft magnet
D. Dielectric material

32. The season cracking of Brass in ammonia bearing environment is the following type of

conosion

A. Stress corrosion
B. Galvanic corrosion
C. Pilling corrosion
D. Inter-granular corrosion

33. Martensite transformation is an example of
A. Recollstructive transformation
B. Displacive transformation

C. Diffusioll.phase transformation
D. Massive phase transformation
34. Creep failure at very high temperatures 0.61'M. where TM is absolute temperature in Kelvin) is identified by the presence of
A. Cavities on grain boundaries
B. Dimples on tracture surface

C. Pits 011 fracture surface
D. Striations

35. The unit for plane-strain fracture tOllghnesS
A. MN/m
B.
C. MN/mJ/2
D. MN/m'12

36. A defect that is bounded by two mirror planes is
A. Stacking fault
B. Twin
C. Orain boundary
D. Screw dislocation
37. Poisson's ratiO refers to
A. Strength in transvcrse direction/strength in the longitudinal direction
B. Minimum stress/maximum SlresS in a fatigue cycle
C. Strain in trans'l.-r.iC direction/strain in the longitudinal dila:tion
D. Strain in the longitudinal direction/slnlin in transverse direction
38. cast iron is prefcrred for machine beds duc to
A. High fatigue strength
B. High damping capacity
C. Very high ductility
D. lIS light weight
Tendency for grain growth in steels can be strongly reduced by the addition of
A. AI, Ti and V
B. S,Pand Sb
C. Mn, NiandC
D. Ba, Cu and Mn
40. Thc dvnamic hardness ofa metal surface is obtained using
A. Shore sclem"""pe
B. Rockwell C hardness test
C. Moh's hardness lest
D. Brinell hardness test
I

41. The integral fxe'dx is equal to o
A.O

C.
I


B.O.5
D.3.5

42. "Meissner effect'· is associated with
A. Superplasticitv.
B. Superelasicity.
C. Superconductivity
D. Superallo)'s
43. Directional Solidification can be used to producc
A. Creep-resistant materials required for aerospace applications
B. Shape memory alloys
C. Fuel clad tubes for nuclear rcactors
D. Materials for Railway axles

44. Ultimate tensile strength is by:
A. Maximum Icnad/original area of cross section
R. Maximum load/instantaneous area of cross section
C. Yield load/original area of cross section
D. Yield load/instantaneous area ofcross section

45. Elements A and B will fonn a solid solution under the following condition all are lattice
paramelers of A and B respectively)
A. laA-a.l> 15
B. laA-a.1 15
C. laA+a.l< 15%
lJ. laA+a.l> 15%

10


46. Ellingbam diagram is a representative plot between:
A. aGvsT
B. aGvsP
c.
aUvsT

D.
aU vsP



47. A thermocouple is used to measure temperature. It works on the principle expounded by
A. Seebeck
B. Einstein
C. Raman
D. Roentgen

48. Fermi level ofa metal defines
A. The highest occupied level ofelectron energies at absolute zero
B. The lowest occupied level of electron energies at absolute zero
C. The highest occupied Icvel of electron energies at room temperature
D. The band gap in an intrinsic semi-conductor

49. An intermetallic that is superconducting is
A. Ni,AI
B. Nb,Sn
C. TiJAI
D. MoSi2

50. Peak strengthening in age hardening AI-Cu alloys is derived from
A. LocaJ clustering ofcopper atoms
B. Ordering of copper atoms on oo} planes of matrix
C. Formation of coherent precipitate platelets ofCuAl2
D. The occurrence ofan equilibrium phase CuAl2

51. The alloying element that facilitates the formation of passive layer in stainless steels
A. Nickcl
B. Carbon
C. Niobium
D. Chromium

52. Major strengthening phase in Ni-hase superalloys is
A. Gamma-prime
B. Sigma Phase
C. Chromium carbide
D. Eta-phase
53. Radiation pyrometers are used
A. For measurement ofradiation dose
B. For determining viscosity ofthe liquids
C. For temperature measurement
D. For measuring length ofraillrack
54. To calculate the residual stresses in a matcrial using X-ray diffraction, the following
parameter is used
A. Area under the peak
B. Maximunl intensity ofthe peak
C. Full width at half maximum of the peak
D. Full width at full maximum ofthe peak
55. Pig iron is produced in
A. Bessemer converter
B. Open hear'.h furnace
C. Blast furnace
D. Cupola
56. Differential Scanning Calorimetry is used for the determination of
A. Surface topography
B. Co-efficient ofthermal expansion
C. Phase transformations
D. Grain boundary chemical analysis
p­


57. A material, which develops a voltage when subjected to mechanical compression, twisting or


distortion is known as
A. Piezoelectric
B. Pyroelectic
C. Magnetostrictive
D. Ferroelectric
58. Joule-Thompson expansion of an ideal gas is
A. Adiabatic
B. Isobaric
C. Isothermal
D. lsocoric
59. The limit ofrcsolution ofa microscope is given by
A. The wavclenb'lh of the radiation
B. Magnifying power of the eyepiece
C. Aperture size
D. Polarization of the radiation
60. The units ofmagnetic flux density are
A. Ampere
B. Weber
C. Tcsla
D. Faraday
61. During machining ofcast iron at low cutting speeds, the type of chip that gets generated is
A. A discontinuous chip
B. A continuous chip
C. A continuous chip with build-up-edge
D. Shear localized chip
62. lbe resistance to relative motion between two bodies in contact under a normal load is defined as
A. Erosion
B. Wear
C.Friction

O. Fretting
63. Hot tops in the moulds are provided to reduce the
A. depth ofthe shrinkage cavity fonned in ingot
B. usage ofmolten metal in ingot
C. size oflbe ingot
D. oxidation ofmolten metal
64. Toughness ofa material is given by
A. Its tntal mass
.

B. Its surface area
C. Area under the stress-strain curve
O. The slope of the stress-strain curve below proponionallimit
65. Which uflhe following expresses Boyle's law correctly
A. dV
dP

B. dV P
V

C. dV V
dP P

D. dV
dP P

66. The binary representation ofthe decimal number 7.125 is
A. 111.111
B.ll1.010

C. 111.001
0.111.100
4­

67. The electrodes used for resistance welding
A. Copper-Chromium alloys
B. Flux coated mild steel electrodes
C. Tungsten filler wire
D. Rotating anode

68. The yield strength of many metals and alloys has been found
A. To vary linearly with grain size
B. To vary as square root of grain size
C. To vary as inverse of square ruot of grain size
D. To vary as square of grain size

69. Hume-Rothery proposed that the formalion of electron compounds ""eur at the following
ratios
A. 21/12, 21/13, 21/14
R. 3f2. 3/5
C. 7/4. 7/6
D.I/3.2/3.4/3


70. The pwct:'ssing method to improve the creep resistance of the material by reduction of transverse grain boundaries
A. Rotary swaging
R. Directional solidification
C. Cold rolling
D. Hot extrusion

71. The following eJement is a fertile isotope in nuclear fuels
A.U'"
B. Pu239
C. Th2J2
D.U233


72. The dimensional formula for specifie hcat capacity is
A.
B. MLT'O"
C. M"LT'O"
D. MOL"T'O,I

73. The First law of Themiodynamies is represented by
A.dQ=TdS B.dQ=dU+dW
C. PV-onstant
D. PV=nRT

74. For a thcnnodynamie system to be Slable.
A. Its free energy should be maximum
R. Its free energy should be minimum
C. Its enthalpy should be minimum
D. Its entropy should be minimum

75. One of the following is an Eutectic reaction.
A. Liquid Solid I+Solid2
R. Liquid Liquid2+Solid I
C. Liquid1+SolidI Solid2
D. Solid Solid1+Solid2
Ii,