Materials Characterisation - Physical Metallurgy - Metallurgical Engineering Previous Year Questions

1

2007 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2007

The X-ray diffraction angle (2θ, in degrees) for the (110) set of planes is

A

22.3°

B

35.5°

C

44.6°

D

63.3°

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2

2007 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2007

The zone axis is

A

[112]

B

[111]

C

[001]

D

[110]

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3

2008 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2008

The Miller indices of the reflecting plane are

A

(111)

B

(200)

C

(220)

D

(222)

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4

2009 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2009

In an X-ray diffraction experiment, radiation of wavelength 0.154 nm is used. Assuming the order of reflection to be 1, the Bragg angle for the (220) set of planes in copper will be

A

12.56°

B

36.98°

C

48.98°

D

74.21°

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5

2010 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2010

The energy dispersive spectrometer (EDS) in an electron microscope does chemical analysis by analysing the energy of

A

secondary electrons

B

characteristic X-rays

C

auger electrons

D

back-scattered electrons

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6

2012 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2012

A peak in the X-ray diffraction pattern is observed at 2θ = 78°, corresponding to {311} planes of an fcc metal, when the incident beam has a wavelength of 0.154 nm. The lattice parameter of the metal is approximately

A

0.6 nm

B

0.4 nm

C

0.3 nm

D

0.2 nm

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7

2012 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2012

Grain size of the material is approximately

A

45 μm

B

35 μm

C

4.5 μm

D

3.5 μm

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8

2013 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2013

For an FCC metal, the ratio of interplanar spacing obtained from the first two peaks of the X-ray diffraction pattern is

A

1.91

B

1.63

C

1.41

D

1.15

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9

2016 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2016

A schematic of X-ray diffraction pattern of a single phase cubic polycrystal is given below. The miller indices of peak A is

A

210

B

220

C

222

D

310

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10

2017 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2017

The second peak in the powder X-ray diffraction pattern of a FCC metal occurs at a Bragg angle θ (in degrees) = __________ (answer up to two decimal places)
(Given: λ_CuKα = 0.154 nm; lattice parameter of the metal = 0.36 nm)

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11

2018 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2018

What is the most-abundant anion in a \(2CaO.SiO_2\) melt?

A

\((SiO_4)^{4-}\)

B

\((Si_2O_7)^{6-}\)

C

\((Si_3O_{10})^{8-}\)

D

\((Si_4O_{14})^{10-}\)

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12

2019 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2019

In a typical scanning electron microscope (SEM) image, information about topography and atomic contrast are obtained from __________.

A

secondary electron and auger electron, respectively.

B

primary electron and secondary electron, respectively.

C

secondary electron and back-scatter electron, respectively.

D

back-scatter electron and auger electron, respectively.

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13

2020 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2020

X-ray diffraction pattern from an elemental metal with a FCC crystal structure shows the first peak at a Bragg angle \( \theta = 24.65^\circ \). The lattice parameter of this metal is ________ nm.
Given, wavelength of the X-ray used is 0.1543 nm.

A

0.185

B

0.262

C

0.320

D

0.370

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14

2021 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2021

In the X-ray diffraction pattern of a FCC crystal, the first reflection occurs at a Bragg angle (θ) of 30°. The Bragg angle (in degree) for the second reflection will be: ______ (round off to 1 decimal place).

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15

2022 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2022

The sequence of peaks corresponding to the planes (in the order of increasing \(2\theta\)) observed in the X-ray diffractogram of a pure copper powder sample is ________

A

111, 200, 220, 311

B

110, 200, 211, 220

C

110, 200, 211, 311

D

111, 200, 311, 220

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16

2024 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2024

Which of the following $(h\ k\ l)$ reflections is/are allowed in an X-ray diffraction pattern of a crystal with face centered cubic lattice?

A

(0 0 1)

B

(0 1 1)

C

(1 1 1)

D

(0 0 2)

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17

2026 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2026

During metallography, Nital is the most commonly used for etching ______________.

A

Bronze

B

Brass

C

Mild Steel

D

Aluminium

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18

2026 · Metallurgical Engineering · Physical Metallurgy · Materials Characterisation

Metallurgical Engineering (MT) 2026

Residual stress present in a material can be determined by which one of the following techniques:

A

X-ray Diffraction (XRD)

B

Tensile Testing

C

Thermo-Gravimetric Analysis (TGA)

D

Optical Microscopy

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