Introduction to Metallurgy MCQ Questions and Answers

11

The structure of solids is investigated by using

A) Cosmic rays B) γ-rays C) β-rays D) X-rays

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Answer & Solution

Answer: Option D

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12

Which one of the following can give information about the corrosion rate?

A) Pourbaix diagram B) Polarization technique C) EMF series D) Galvanic series

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Answer & Solution

Answer: Option B

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13

\[\left[ {\begin{array}{*{20}{c}} {21}&0&0 \\ 0&9&0 \\ 0&0&6 \end{array}} \right]MPa\]
The maximum shear stress available for the above stress tensor is . . . . . . . . MPa.

A) 9 B) 6 C) 1.5 D) 7.5

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Answer & Solution

Answer: Option A

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14

The pilling-Bedworth ratio is defined as

A) the molar weight of an oxide divided by the molar weight of the metal consumed in oxide formation B) the volume of the oxide divided by the volume of the metal consumed in oxide formation C) the density of the oxide divided by the density of the metal consumed in oxide formation D) the molar Gibbs energy of the oxide divided by the Gibbs energy of the metal consumed in oxide formation

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Answer & Solution

Answer: Option B

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15

Fick's second law of diffusion is stated as:

A) $$\frac{{\partial C}}{{\partial T}} = D.\frac{{{\partial ^2}C}}{{\partial {x^2}}}$$ B) $$\frac{{\partial C}}{{\partial x}} = D.\frac{{{\partial ^2}C}}{{\partial {t^2}}}$$ C) $$\frac{{\partial C}}{{\partial t}} = \frac{\partial }{{\partial x}}\left( {D.\frac{{\partial C}}{{\partial t}}} \right)$$ D) $$\frac{{\partial C}}{{\partial t}} = \frac{\partial }{{\partial t}}\left( {D.\frac{{\partial C}}{{\partial x}}} \right)$$

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Answer & Solution

Answer: Option A

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16

The reflections allowed in DC crystal

A) when h, k and l are all odd, or when all are even, (h + k + l) should be divisible by four B) for all values of (h² + k² + l²) C) for h + k = l D) when h, k and l are all odd or all even

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Answer & Solution

Answer: Option A

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17

Which part of a microscope do you look through to see an object magnified?

A) eyepiece lens B) objective lens C) stage D) focus knob

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Answer & Solution

Answer: Option A

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18

Identify the combination of mechanisms which best describes sintering of pure metals in powder metallurgy.
P. Grain boundary melting
Q. Liquid metal freezing
R. Interparticle melting
S. Recrystallisation
T. Grain growth
U. Oxidation
V. Reduction

A) S and I B) P and Q C) R and Q D) U and V

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Answer & Solution

Answer: Option D

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19

Which one of the following expands upon solidification?

A) Low carbon steel B) High carboon steel C) White cast iron D) Gray cast iron

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Answer & Solution

Answer: Option D

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20

The Larson-Miller parameter 'P' connecting the temperature 'T' and the rupture time 't_r' is given as

A) P = T(log t_r + c) B) $$P = \log {t_r} - \frac{c}{T}$$ C) $$P = \frac{{\left( {c - T} \right)}}{{{t_r}}}$$ D) P = Tlog t_r

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Answer & Solution

Answer: Option A

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Introduction to Metallurgy MCQ Questions and Answers | Metallurgical Engineering