GATE MT topic:materials-science PYQs & Answers — Page 50

Questions 491–500 of 650. Imported answers require independent review unless marked reviewed.

Match the reactors / refining sites in Column I with the corresponding refining process in Column II.

Column I: Reactors / refining sites (P) Blast furnace runner (Q) AOD (R) Torpedo car (S) BOF

Column II: Refining processes

De-carburization

External De-sulfurization

De-phosphorization

External De-siliconization

Your answerChoose one option.

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

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

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

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

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Match the injection metallurgy techniques in Column I with the corresponding objectives in Column II.

Column I: Injection metallurgy techniques (P) Aluminium wire feeding (Q) Calcium treatment (R) Argon rinsing (S) Lime powder injection

Column II: Objectives

Inclusion modification

Mixing of liquid steel

De-sulphurization

Deoxidation

Your answerChoose one option.

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

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

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

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

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The table (see options below) providing correct information about crystal structure, co-ordination number and packing fraction is ____________.

[Note: FCC: Face centered cubic; BCC: Body centered cubic; DC: Diamond cubic. CN: Coordination number; PF: Packing fraction]

Your answerChoose one option.

Crystal structure | CN | PF FCC | 12 | 0.74 BCC | 8 | 0.68 DC | 4 | 0.34

Crystal structure | CN | PF FCC | 8 | 0.74 BCC | 4 | 0.68 DC | 6 | 0.34

Crystal structure | CN | PF FCC | 8 | 0.52 BCC | 12 | 0.68 DC | 12 | 0.74

Crystal structure | CN | PF FCC | 12 | 0.74 BCC | 8 | 0.68 DC | 4 | 0.74

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Match the phase transformation in Column I with the corresponding reaction in Column II.

[Note: α, β, γ are solid phases; L, L₁, L₂ are liquid phases.]

Column I: Phase transformation (P) Peritectic (Q) Monotectic (R) Eutectoid (S) Syntetic

Column II: Reaction

γ → α + β

L₁ + L₂ → α

L₁ → L₂ + α

L + α → β

Your answerChoose one option.

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

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

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

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

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In a typical scanning electron microscope (SEM) image, information about topography and atomic contrast are obtained from _____________.

Your answerChoose one option.

secondary electron and auger electron, respectively.

primary electron and secondary electron, respectively.

secondary electron and back-scatter electron, respectively.

back-scatter electron and auger electron, respectively.

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Match the ceramics in Column I with corresponding application in Column II.

Column I: Ceramics (P) Mullite (Q) Spinel ferrites (R) Tungsten carbide (S) Barium titanate

Column II: Application

Cutting tools

Refractories

Piezoelectric

Soft magnet

Your answerChoose one option.

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

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

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

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

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An aluminum single crystal is loaded in tension along [1̄ 1 0] axis. Among the following slip systems, the one that will be activated first is

Your answerChoose one option.

(1̄ 1̄ 1)[0 1̄ 1]

(1̄ 1̄ 1)[0 1 1]

(1̄ 1̄ 1)[1 1̄ 0]

(1̄ 1̄ 1)[1 0 1]

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The correct Mohr’s circle construction for the stress state given below is _____________.

Diagram for Metallurgical Engineering question 33

Stress state:

The shared axes are

to the right and

upward.

Your answerChoose one option.

Diagram for Metallurgical Engineering question 33 (figure 2)

Diagram for Metallurgical Engineering question 33 (figure 3)

Diagram for Metallurgical Engineering question 33 (figure 4)

Diagram for Metallurgical Engineering question 33 (figure 5)

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Match the automobile components in Column I with the corresponding manufacturing process in Column II.

Column I: Automobile components (P) Engine block (Q) Brake pad (R) Connecting rod (S) Door panel

Column II: Manufacturing process

Forging

Sheet metal forming

Casting

Powder metallurgy

Your answerChoose one option.

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

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

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

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

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The equilibrium constant for the following reaction at 300 K is _____________.

C (graphite) + 2H₂ (g) → CH₄ (g)

Given: At 300 K, ΔH° = −74,900 J.mol⁻¹; ΔS° = −80 J.mol⁻¹.K⁻¹; R = 8.314 J.mol⁻¹.K⁻¹.

Your answerChoose one option.

5.6 × 10⁶

3.6 × 10⁷

4.0 × 10⁸

7.3 × 10⁸

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GATE MT topic:materials-science PYQs

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