Engineering Metallurgy mcq pdf [sppu]

Engineering Metallurgy mcq

engineering metallurgy mcq, engineering metallurgy mcq pdf, Engineering Metallurgy mcq pdf sppu, engineering metallurgy mcq questions anna university, engineering metallurgy mcq questions pdf, engineering metallurgy sppu mcq pdf, metallurgical engineering mcq

Q. 1. If austenite is allowed to transform i.e., cooled slowly at 727°C then the transformed
product is known as _______.

A : Ferrite
B : Pearlite
C : Bainite
D : Martensite

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Pearlite

Q. 2. Arrange the following in terms of increasing severity of quench
P.Oil quenching
Q.Water quenching
R. Water quenching with agitation
S. Brine quenching

A : P<Q<R<S
B : Q<R<P<S
C : P<Q<S<R
D : Q<P<R<S

P

Q. 3. What is the crystal structure of austenite upon heating?

A : Body-centered cubic
B : Face-centered cubic
C : Hexagonal closely packed
D : Body-centered tetrahedral

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Face-centered cubic

Q. 4. Which of the following cannot be obtained using a phase diagram?

A : Melting temperatures of various phases
B : Temperature range for solidification
C : Equilibrium solid solubility
D : Purity of materials

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Purity of materials

Q. 5. Scanning probe microscope magnification is range between?

A : 10-1 to 10-3
B : 10-2 to 10-5
C : 10-3 to 10-6
D : 10-7 to 10-10

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10-7 to 10-10

Q. 6. transmission electron microscopy (TEM) is used for ….?

A : Thick
B : Porous
C : Thin
D : Heavy

Thin

Q. 7. Following are the characteristics of martensitic transformation

A : It is diffusionless transformation
B : It has BCT structure
C : The cooling should be faster than CCR
D : All

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All

Q. 8. Which of the following is used in electron microscope?

A : electron beams
B : magnetic fields
C : light waves
D : electron beams and magnetic fields

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electron beams and magnetic fields

Q. 9. Match the phases of steel in Group I with the crystal structures in Group II GROUP I
GROUP II P. Martensite 1. bcc Q. Cementite 2. fcc R. Austenite 3. bct S. Ferrite 4.
Orthorhombic

A : P-3, Q-4, R-1, S-2
B : P-2, Q-3, R-1, S-4
C : P-3, Q-4, R-2, S-1
D : P-4, Q-3, R-2, S-1

P-3, Q-4, R-2, S-1

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Q. 10. In the homogeneous nucleation, nucleation rate is maximum __________

A : At freezing point
B : Above boiling point
C : Below melting point
D : At room temperature

Below melting point

Q. 11. A specific body of material or a series of alloys with the same compositions is/are known
as _________

A : Component
B : System
C : Alloy
D : Solute

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System

Q. 12. According to Hume Rothery’s rules, size of atoms must not differ by more than
________

A : 05
B : 0.15
C : 0.35
D : 0.55

0.15

Q. 13. Below the critical radius the tiny particles are _______ and are called _______

A : unstable, grains
B : stable, grains
C : unstable, embryo
D : stable, embryo

unstable, embryo

Q. 14. How many types of nucleation process are there and what are they?

A : 2 and (fusion and fission)
B : 2 and (Heterogeneous and Homogeneous)
C : 2 and (Heterogeneous and fusion)
D : 4 and (fusion, fission, Heterogeneous and Homogeneous)

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2 and (Heterogeneous and Homogeneous)

Q. 15. Metallographic ……..is a chemical technique used to highlight features of metals at
microscopic levels

A : Mounting
B : Grinding
C : Polishing
D : Etching

Etching

Q. 16. Fine grain size, usually, cannot be obtained during the following process?

A : Slow cooling
B : fast cooling
C : increasing nucleation rate
D : retarding grain growth

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Etching

Q. 17. If the cooling rate is fater than CCR the transformed product is known as
………………….

A : Ferrite
B : Pearlite
C : Bainite
D : Martensite

Martensite

Q. 18. The hardness of quenched Martensite

A : increases with increasing carbon percentage
B : decreases as carbon percentage increases
C : first increases and then remains almost constant as the carbon percentage increases
D : first increases and then decreases as carbon percentage increases.

first increases and then remains almost constant as the carbon percentage increases

Q. 19. One of the following is the transformation product of Austenite

A : Austenite to ferrite
B : Austenite to ledeburite
C : Austenite to martensite
D : None

Austenite to martensite

Q. 20. The critical nuclei radius is:

A : Proportional to the free energy
B : Proportional to the scattering vector
C : Inversely proportional to the surface tension
D : Proportional to the surface tension

Proportional to the surface tension

Q. 21. AFM stand for …………………….

A : Atomic Force Macroscopy
B : Atomic Force Microscopy
C : Automatic Force Microscopy
D : Atomic Forge Microscopy

Atomic Force Macroscopy

Q. 22. Chilled cast iron shows —— structure at the surface and —– structure at the centre.

A : Gray, White
B : White , Nodular
C : White , Black
D : White , Gray

White , Gray

Q. 23. Which among the following helps us in getting a three-dimensional picture of the
specimen?

A : Transmission Electron Microscope
B : Scanning Electron Microscope
C : Compound Microscope
D : Simple Microscope

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Scanning Electron Microscope

Q. 24. Phases that exist on left side of an invariant reaction line are called……?

A : Pro-phase
B : Hypo-Phase
C : Hyper-Phase
D : Eutectoid

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Hypo-Phase

Q. 25. The original grain size characteristics, however, can usually be restored by ……

A : Etching
B : stress relieving
C : Welding
D : Cold working

stress relieving

Q. 26. On what factors do the intensity of secondary electrons depend upon?

A : shape of the irradiated object
B : chemical composition of the irradiated object
C : number of electrons ejected
D : size and chemical composition of the irradiated object, number of electrons ejected and on the

size and chemical composition of the irradiated object, number of electrons ejected and on the

number of electrons reabsorbed by surrounding
Q. 27. The boundary line between (liquid+solid) and (solid) regions must be part of _________.

A : Slovus
B : Solidus
C : Liquidus
D : Tie-line

Solidus

Q. 28. Transformation of austenite to bainite starts from the nucleation of _____ at austenite
grain boundary.

A : Ferrite
B : Ledeburite
C : Martensite
D : Cementite

Ferrite

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Q. 29. What is the melting point of pure iron?

A : 1500°C
B : 1535°C
C : 1570°C
D : 1605°C

1535°C

Q. 30. Which one of the following techniques does NOT require quenching to obtain final case
hardness?

A : Flame hardening
B : Induction hardening
C : Nitriding
D : Carburizing

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Nitriding

Q. 31. The cast iron containing graphite in the form of flakes of graphite is …..

A : White Cast Iron
B : Chilled Cast Iron
C : Nodular Cast Iron
D : Gray Cast Iron

Gray Cast Iron

Q. 32. The boundary line between (alpha) and (alpha+beta) regions must be part of _________.

A : Slovus
B : Solidus
C : Liquidus
D : Tie-line

Slovus

Q. 33. Gibbs phase rule for general system:

A : P+F=C-1
B : P+F=C+1
C : P+F=C-2
D : P+F=C+2

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P+F=C+2

Q. 34. Where does the solidification in a phase diagram start?

A : Liquidus line
B : Solidus line
C : At equilibrium
D : At freezing point

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Liquidus line

Q. 35. Flow line are observed in which of following manufacturing process?

A : Casting
B : Welding
C : Forging
D : Forming

Forging

Q. 36. What is the highest magnification on an optical microscope?

A : 300 X
B : 1000X
C : 1500 X
D : 2000 X

1500 X

Q. 37. Pick the odd one in the following:

A : Isomorphous alloy
B : Terminal solid solution
C : Intermediate solid solution
D : Compound

Isomorphous alloy

Q. 38. Following is wrong about a phase diagram

A : It gives information on transformation rates
B : Relative amount of different phases can be found under given equilibrium conditions
C : It indicates the temperature at which different phases start to melt
D : Solid solubility limits are depicted by it.

It gives information on transformation rates

Q. 39. Nitric Acid and Alcohol is used for etching of ………. Material?

A : Plastic
B : Composite
C : Non-Ferrous Metals
D : Ferrous Metals

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Ferrous Metals

Q. 40. Martensite obtained with carbon less than 0.6% is

A : Lath
B : Plate
C : Both
D : None

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Lath

Q. 41. Which one of the following elements is an austenite stabilizer?

A : Nitrogen
B : Molybdenum
C : Vanadium
D : Tungsten

Nitrogen

Q. 42. Homogenous nucleation is:

A : The first step of any crystal growth.
B : Always leads to crystal growth.
C : A process that can lead to crystal growth.
D : A process that leads to crystal growth if paired with

A process that can lead to crystal growth

Q. 43. Reaction in which one solid gives two solid

A : Peritectic

B : Eutectic
C : Eutectoid
D : Monotectic

Q. 44. A solid + a liquid result in a solid up on equilibrium cooling during __________
reaction.

A : Peritectic
B : Eutectic
C : Eutectoid
D : Monotectic

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Peritectic

Q. 45. Retained austenite can be eliminated by

A : Tempering
B : Sub zero treatment
C : Plastic deformation
D : All

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All

Q. 46. The super saturated solution of carbon in iron BCT structure is known as
…………………

A : Ferrite
B : Pearlite
C : Bainite
D : Martensite

Martensite

Q. 47. The hardness of white cast iron is in the range of

A : 150 to 300 BHN
B : 350 to 500 BHN
C : 500 to 700 BHN
D : 800 to 900 BHN

350 to 500 BHN

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Q. 48. at room temperature, hardness, yield strength, tensile strength, fatigue strength and
impact strength all …… with …….grain size.

 


A : Decrease, Increase
B : Increase, decrease
C : Increase, Increase
D : Decrease, Decrease

Increase, decrease

Q. 49. Iron-Carbon phase diagram is a ___________

A : Unary phase diagram
B : Binary phase diagram
C : Tertiary phase diagram
D : Ternary phase diagram

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Binary phase diagram

Q. 50. The secondary electrons radiated back in scanning microscope is collected by?

A : specimen
B : anode
C : vacuum chamber
D : cathode

anode

Q. 51. Phases like bainite, pearlite & Martensite are transformed from …………..

A : Austenite
B : Ferrite
C : Both
D : None

Austenite

Q. 52. The austenite phase visible in microscope at room temperature is

A : Lower temperature austenite
B : Tempered austenite
C : weak austenite
D : Retained austenite

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Retained austenite

Q. 53. Corrosion resistance of steel is increased by adding

A : Cr

B : Ni
C : Al
D : W

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Cr

Q. 54. Carban Percentage in Steel is up to….?

A : 01
B : 021
C : 043
D : 067

021

Q. 55. Pearlite is __________.

A : Diffusion transformation
B : Diffusionless transformation
C : Both
D : None

Diffusion transformation

Q. 56. In SAE designation of steel , last two digits indicate the …………………

A : The average percent of carbon in the steel
B : The average percentage of Ni in the steel
C : The average percentage of Fe in steel
D : The average percentage of Cr in steel.

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The average percent of carbon in the steel

Q. 57. The ability of a material to exist in more than one crystal structure is known as _______

A : Polymorphism
B : Allotropy
C : Polyhedral phase
D : Lattice

Polymorphism

Q. 58. Which of the following are true for electron microscopy?

A : specimen should be thin and dry
B : image is obtained on a phosphorescent screen

C : electron beam must pass through evacuated chamber
D : specimen should be thin and dry, image is obtained on a phosphorescent screen and electron beam

specimen should be thin and dry, image is obtained on a phosphorescent screen and electron beam

must pass through evacuated chamber
Q. 59. Iron-Carbon phase diagram is a ___________

A : Unary phase diagram
B : Binary phase diagram
C : Tertiary phase diagram
D : Ternary phase diagram

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Binary phase diagram

Q. 60. Degree of scattering in transmission electron microscope is a function of __________

A : wavelength of electron beam used
B : number of atoms that lie in the electron path
C : number and mass of atoms that lie in the electron path
D : mass of atoms that lie in the electron path

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number and mass of atoms that lie in the electron path

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