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Physics of Metals in Metallurgy MCQ Questions and Answers | Metallurgical Engineering

Enhance your knowledge of Physics of Metals in Metallurgy with this comprehensive collection of MCQ questions and answers. These MCQ questions and answers in Physics of Metals in 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

31
The Fe. Al intermetallic phase has a disordered bcc structure at high temperatures. This first four Bragg reflections will be
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Answer: Option D
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32
An elliptical dislocation loop is gliding on plane ABCD of a single crystal of BCC material as shown in the following figure. It is gliding along the burger vector 'b'. Identify the correct statement.
Physics of Metals in Metallurgy mcq question image
P. Plane ABCD belongs to the family of (110).
Q. Burger vector 'b' belong to <110> direction.
R. Dislocation has the edge character at point x and the screw character at point z.
S. Dislocation has the screw character at point x
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Answer: Option D
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33
Match the planes in Group 1 with the interplaner spacings in Group 2 for a cubic crystal having a lattice parameter of 'α'.
Group 1 Group 2
P. (100) 1. $$\frac{\alpha }{{\surd 5}}$$
Q. (110) 2. $$\frac{\alpha }{{\surd 3}}$$
R. (111) 3. $$\frac{\alpha }{{\surd 2}}$$
S. (210) 4. α
5. $$\frac{\alpha }{2}$$
6. $$\frac{\alpha }{3}$$
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Answer: Option D
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34
Match the energy gaps in Group II with the materials in Group I.
Group I Group II
P. Diamond 1. 0.1 eV
Q. Silicon 2. 0.7 eV
R. Grey tin 3. 1.1 eV
4. 6.0 eV
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Answer: Option D
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35
In an FCC crystal, the strain energy per unit length of a dislocation with Burgers vector $$\frac{a}{2}$$ <110> is . . . . . . . . times that of a $$\frac{a}{6}$$ <112> dislocation.
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Answer: Option C
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36
In a hcp single crystal, slip on the basal plane may occur; if the tensile axis is along
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Answer: Option B
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37
The elastic strain in copper is due to
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Answer: Option A
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38
The atomic packing factor the diamond cubic structure is
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Answer: Option B
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39
For a cubic metal with lattice parameter of 3.92°A, the first four diffraction peaks from the X-ray powder diffraction pattern taken with Cu-Ka radiation (λ = 1.5405°A) occur at 2θ values of 39.7, 46.2, 67.5 and 81.3 degrees. The crystal structure of the metal is
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Answer: Option B
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40
In a conventional unit cell of a crystal a = b ≠ c and a = β = γ = 90°. This crystal belongs to which of the followings systems?
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Answer: Option B
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