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Physical Metallurgy MCQ Questions and Answers | Metallurgical Engineering

Enhance your knowledge of Physical Metallurgy with this comprehensive collection of MCQ questions and answers. These MCQ questions and answers in Physical Metallurgy are specifically designed for students of Metallurgical Engineering who are preparing for the GATE Exam. Strengthen your preparation and excel in your studies with this valuable resource. Page-4 section-1

Each section contains 100 MCQs on Physical Metallurgy .
31
The relation between dendrite arm spacing (x) and the solidification time (t) is given by (A and n are constants)
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Answer & Solution
Answer: Option C
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32
The hardenability of steels decreases with
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Answer & Solution
Answer: Option D
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33
The angle between the line vector and the burgers vector of an edge dislocation is
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Answer: Option B
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34
Which of the following cooling curves (shown in schematic) in an eutectoid steel will produce 50% bainitic structure?
Physical Metallurgy mcq question image
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Answer & Solution
Answer: Option B
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35
At 910°C γ-Fe transforms to α - Fe resulting in a percentage volume expansion of
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Answer: Option D
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36
The boundary line between (liquid) and (liquid+solid) regions is called
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Answer: Option B
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37
Metal A nucleates as a spheres in a melt. Assuming Y(liquid/solid surface energy) = 200mJ/m2 and ΔGv (change in volume free energy) = -108 J/M3 the critical radius (in nm) for stable nuclei is
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Answer: Option D
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38
Two Cu-Ni alloys, one with 47 wt.% Ni and the other with 53 wt.% Ni, are kept in separate crucibles and are allowed to equilibrate at the same-temperature T1 between the liquidus and the solidus. The two alloys have
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Answer: Option B
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39
Match the following.
Gruop-I Gruop-II
P. Line defect 1. Vacancy
Q. Point defect 2. Grain boundary
R. Area defect 3. Voids
S. Volume defect 4. Dislocations
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Answer & Solution
Answer: Option A
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40
The primary strengthening mechanism in 70 : 30 brass is
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Answer: Option A
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