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Introduction to Metallurgy MCQ Questions and Answers | Metallurgical Engineering

Enhance your knowledge of Introduction to Metallurgy with this comprehensive collection of MCQ questions and answers. These MCQ questions and answers in Introduction to 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-5 section-1

41
An electrolytic refining cell for copper consists of an alloy with activity of copper acu = 0.8 as the anode, and pure copper as the cathode. What is the absolute value of the cell potential (in millivolts) at 25°C, given that copper is divalent? Faraday constant is 96500 C/mol and the universal gas constant is 8.314 J/(mol.K).
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Answer & Solution
Answer: Option A
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42
The percentage of ferrite and pearlite in annealed 0.5% carbon steel is approximately
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Answer & Solution
Answer: Option D
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43
Total Magnification is obtained by . . . . . . . .
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Answer & Solution
Answer: Option D
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44
Match the particle morphologies in Group 1 with the powder production methods in Group 2.
Group-1 Group-2
P. Superalloy powder with rounded morphology 1. Carbonyl process
Q. Monosieed spherical Ta powder 2. Gas atomisation
R. Fe powder with onion peel structure 3. Oxide reduction
S. Irregularly shaped W powder 4. Rotating electrode process
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Answer & Solution
Answer: Option B
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45
Match the processes in Group I with the objectives in Group II.
Group I Group II
P. Vacuum Arc Degassing (VAD) 1. Primary iron making
Q. LD 2. secondary steel making
R. COREX 3. Direct smelting
S. Blast Furnace 4. Primary steel making
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Answer & Solution
Answer: Option D
Solution:
Vacuum Arc Degassing (VAD) is a refining process used after primary steel making to remove dissolved gases and improve steel quality, hence it belongs to secondary steel making.

LD process (Basic Oxygen Furnace) converts hot metal into steel by oxidizing impurities and is classified as primary steel making.

COREX process produces hot metal directly from iron ore without using coke ovens and sinter plants, therefore it is a direct smelting process.

Blast Furnace is used to extract iron from iron ore and is the main process for primary iron making.

Thus, the correct matching is P-2, Q-4, R-3, S-1, which corresponds to Option D.
46
Which one is not an agglomeration process?
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Answer & Solution
Answer: Option C
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47
The driving force for sintering a compact consisting of spherical particles of radius R1 is ΔG1. If the particle size is reduced to R2 = 0.1 R1, the corresponding driving force ΔG2 = αΔG1, where α is
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Answer: Option C
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48
The engineering stress-strain curve for a ceramic material is
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Answer: Option D
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49
The parameters can be measured using the DSC and DTA are
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Answer: Option C
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50
In heterogrnous nucleation, the radius of the critical nucleus does not depends upon
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Answer & Solution
Answer: Option A
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