Introduction to Metallurgy MCQ Questions and Answers | Metallurgical Engineering Page-5 section-1

41.
An electrolytic refining cell for copper consists of an alloy with activity of copper ac_u = 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).

A. 2.9

B. 4.6

C. 6.8

D. 8.9

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42.
The percentage of ferrite and pearlite in annealed 0.5% carbon steel is approximately

A. 7.3% ferrite and 92.7% pearlite

B. 92.7% ferrite and 7.3% pearlite

C. 37.5% ferrite and 62.5% pearlite

D. 63.5% pearlite and 37.5% ferrite

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43.
Total Magnification is obtained by . . . . . . . .

A. Magnifying power of the objective lens

B. Magnifying power of eyepiece

C. Magnifying power of condenser lens

D. Magnifying power of both the objective lens and eyepiece

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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

A. P-2, Q-1, R-4, S-3

B. P-1, Q-4, R-3, S-2

C. P-2, Q-4, R-1, S-3

D. P-4, Q-1, R-2, S-3

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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

A. P-3, Q-4, R-2, S-1

B. P-4, Q-3, R-1, S-2

C. P-3, Q-2, R-1, S-4

D. P-2, Q-4, R-3, S-1

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46.
Which one is not an agglomeration process?

A. Nodulizing

B. Briquetting

C. Roasting

D. Pelletizing

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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

A. 2

B. 5

C. 10

D. 15

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48.
The engineering stress-strain curve for a ceramic material is

A. parabolic

B. exponential

C. logarithmic

D. linear

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49.
The parameters can be measured using the DSC and DTA are

A. line positions of the crystals

B. elasticities of crystals

C. enthalpies of substances

D. catalytic properties of enzymes

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50.
In heterogrnous nucleation, the radius of the critical nucleus does not depends upon

A. contact angle

B. undercooling

C. the surface energy of the interface between the product and parent phases

D. enthalpy change per unit volume of the product phase

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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

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

Introduction to Metallurgy MCQ Questions and Answers | Metallurgical Engineering

Answer & Solution

42. The percentage of ferrite and pearlite in annealed 0.5% carbon steel is approximately

Answer & Solution

43. Total Magnification is obtained by . . . . . . . .

Answer & Solution

Answer & Solution

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

Answer & Solution

46. Which one is not an agglomeration process?

Answer & Solution

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

Answer & Solution

48. The engineering stress-strain curve for a ceramic material is

Answer & Solution

49. The parameters can be measured using the DSC and DTA are

Answer & Solution

50. In heterogrnous nucleation, the radius of the critical nucleus does not depends upon

Answer & Solution

42.
The percentage of ferrite and pearlite in annealed 0.5% carbon steel is approximately

43.
Total Magnification is obtained by . . . . . . . .

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

46.
Which one is not an agglomeration process?

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

48.
The engineering stress-strain curve for a ceramic material is

49.
The parameters can be measured using the DSC and DTA are

50.
In heterogrnous nucleation, the radius of the critical nucleus does not depends upon