GATE MT exam:gate PYQs & Answers — Page 25

Questions 241–250 of 650. Imported answers require independent review unless marked reviewed.

Match the welding techniques in Column I with the most appropriate applications in Column II.

Column I (P) Submerged arc welding (Q) Electroslag welding (R) Shielded metal arc welding (S) Resistance spot welding

Column II (1) Thick sections (2) Surfacing and repair (3) Thin sheets (4) Flat position

Your answerChoose one option.

P – 1, Q – 1, R – 2, S – 3

P – 3, Q – 2, R – 1, S – 4

P – 1, Q – 3, R – 4, S – 2

P – 2, Q – 4, R – 3, S – 1

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Concerning the chemical potentials of components in a binary system at constant pressure, the correct statement(s) is/are

Your answerSelect all correct options. You can choose more than one.

For single-phase equilibrium at a given temperature, chemical potentials of the components change with alloy composition.

For two-phase equilibrium at a given temperature, chemical potential of any component in both phases is the same.

For two-phase equilibrium at a given temperature, chemical potentials of the components change with alloy composition.

For single-phase equilibrium at a given composition, chemical potentials of the components do not change with temperature.

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Which of the following is/are the role(s) of coke in a blast furnace?

Your answerSelect all correct options. You can choose more than one.

reducing agent

heat source

gas permeable medium

flux

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Identify the INCORRECT statement(s)

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Calcination is typically exothermic and roasting is usually endothermic.

Coking of coal is carried out in a shaft furnace.

The aims of extractive metallurgy processing are separation, compound formation, metal production, and metal purification.

The secondary steelmaking offers steel cleanliness, composition adjustments, and temperature adjustments.

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For the given schematic TTT diagram of an eutectoid steel, the following statement(s) is/are true for the heat treatment schedules HT-1, HT-2, and HT-3.

Diagram for Metallurgical Engineering question 50

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HT-3 leads to the formation of a pearlite microstructure

HT-1 leads to a predominantly martensite microstructure

HT-2 leads to a bainite microstructure

HT-3 leads to a mixture of pearlite and bainite microstructure

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A dislocation loop PQRSTU is on the

plane of a cubic single crystal with Burgers vector

. The dislocation segments

and

are parallel to

and

directions, respectively.

Diagram for Metallurgical Engineering question 51

The correct statement(s) is/are

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Dislocation segment PQ is mixed in character.

Dislocation segment UT is screw in character.

Dislocation segment PU is mixed in character.

Dislocation segment QR is edge in character.

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Compared to top gating, the effect(s) of bottom gating in sand mold casting is/are

Your answerSelect all correct options. You can choose more than one.

reduced melt oxidation

reduced mold erosion

enhanced melt oxidation

enhanced mold erosion

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Choose the correct statement(s) in the context of fusion welding of austenitic stainless steel containing about 0.06 wt.% carbon.

Your answerSelect all correct options. You can choose more than one.

Corrosion resistance of heat affected zone is poorer than base material.

Corrosion resistance of heat affected zone is superior than fusion zone.

Corrosion resistance of heat affected zone is same as fusion zone.

Corrosion resistance is same for fusion zone, heat affected zone, and base material.

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For the equation

the value of

is __________ (in integer).

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Enthalpy of formation of an A–B regular solution containing 80 atomic percent A is 3.36

. The activity coefficient of A at 500 K for the solution containing 40 atomic percent A is __________ (round off to 1 decimal place).

Given: Universal gas constant, R = 8.314

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GATE MT exam:gate PYQs

Question 46

Question 47

Question 48

Question 49

Question 50

Question 51

Question 52

Question 53

Question 54

Question 55