GATE MT Metal joining PYQs & Answers

Questions 1–10 of 18. Imported answers require independent review unless marked reviewed.

Which one of the following fusion welding techniques results in least Heat-Affected Zone (HAZ)?

Your answerChoose one option.

Submerged Arc Welding (SAW)

Tungsten Inert Gas Welding (TIG)

Electron Beam Welding (EBW)

Oxy-Acetylene Welding (OAW)

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Which of the following statements is/are CORRECT with respect to fusion welding and solid-state welding of metals and alloys?

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

Thermomechanically affected zone is found in the fusion welding of pure metals.

Partially melted zone is NOT found in the fusion welding of pure metal.

Diffusion bonding is one type of solid-state welding process.

Partially melted zone is found in the fusion welding of alloys with a large freezing range.

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Which of the following welding processes does NOT / do NOT utilize consumable electrode?

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

Plasma arc welding

Gas metal arc welding

Shielded metal arc welding

Electron beam welding

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Which of the following statements is/are correct for joining processes?

(A) In case of soldering and brazing, the filler material has a melting point lower than that of the metals joined.

(B) In tungsten inert gas welding, tungsten is the filler material.

(D) The following reaction is associated with thermit welding:

Note:

stands for gas.

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

In case of soldering and brazing, the filler material has a melting point lower than that of the metals joined.

In tungsten inert gas welding, tungsten is the filler material.

Friction welding is a solid-state joining process.

The following reaction is associated with thermit welding:

. Note:

stands for gas.

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During arc welding, the actual heat input is 200

and the current and voltage are 200 A and 20 V, respectively. For a weld cross-sectional area of 2

and heat transfer efficiency of 0.9, the velocity of welding is ________

. (Round off to the nearest integer).

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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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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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Which one of the following figures illustrates a lap joint with fillet weld?

Diagram for Metallurgical Engineering question 21

Your answerChoose one option.

III

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Which of the following parameter(s) influence(s) the melting rate of the consumable wire in a gas metal arc welding process?

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

Stick-out length

Weld speed

Welding current

Diameter of the consumable wire

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Steel plates are welded autogenously using Gas Tungsten Arc welding with an arc heat transfer efficiency of 0.65. The first weld is made using a welding current of 200 A at an arc voltage of 18 V with a welding speed of 0.002 m·s⁻¹. The second weld is made at a welding speed of 0.002 m·s⁻¹ with the same arc voltage. If both the welds have identical heat input, the welding current of the second weld is ________ A (round off to the nearest integer).

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GATE MT Metal joining PYQs

How to practice Metal joining

Question 14

Question 46

Question 47

Question 49

Question 65

Question 46

Question 53

Question 21

Question 44

Question 59