Welding Technology - Askmemetallurgy

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Askmemetallurgy OfficialGold

Asked: February 25, 2022In: Welding Technology

GATE MT 2022 Q43

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 ...Read more

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 ms^–1.

The second weld is made at a welding speed of 0.0022 ms^–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).

Askmemetallurgy OfficialGold

Asked: February 25, 2022In: Welding Technology

GATE MT 2022 Q28. Which of the following parameter(s) influence(s) the melting rate of the consumable wire in a gas metal arc welding process?

Poll Results

2.86% (A) Stick-out length ( 1 voter )

22.86% (B) Welding speed ( 8 voters )

57.14% (C) Welding current ( 20 voters )

17.14% (D) Diameter of the consumable wire ( 6 voters )

Based On 35 Votes

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Askmemetallurgy OfficialGold

Asked: February 25, 2022In: Welding Technology

GATE MT 2022 Q10. Which one of the following figures illustrates a lap joint with fillet weld?

2022 10

Ashish lisuIron

Asked: July 8, 2021In: Welding Technology

what is the difference between TIG and other welding process and in which process heat loss will be more and why? which welding process is suitable for thin sheets welding?

Ashish lisuIron

Asked: July 8, 2021In: Welding Technology

In arc welding how heat is transferred to the metal piece?

Ashish lisuIron

Asked: July 8, 2021In: Welding Technology

how different type of residual stress generates during different welding thermal cycle? how different type of residual stress generates during rolling process?

[Deleted User]

Asked: June 25, 2021In: Welding Technology

What is the effect of Cr content of SA350 Gr. LF2 forged hollows during welding (SAW)?

[Deleted User]

Asked: June 25, 2021In: Welding Technology

What is the effect of Chromium content of SA 350 grade LF2 forged hollows during welding? (SAW) hollows

Ashish kumar pradhan

Asked: June 20, 2021In: Welding Technology

what is the role of hydrogen in hydrogen welding?

Asked: June 19, 2021In: Welding Technology

why TIG welding can be done in all welding positions?

Asked: April 4, 2021In: Welding Technology

What is HAZ in welding?

Askmemetallurgy OfficialGold

Asked: March 31, 2021In: Welding Technology

GATE MT 2021 Q40. A continuous fillet weld is made using a 3000 W welding machine. At a travel speed of 6 mm s-1, the cross-sectional area (in mm2) of the weld is: (round off to nearest integer). Given: The unit energy required to melt the metal is 6 J mm-3.Heat transfer factor = 0.6 Melting factor = 0.5

[email protected]Copper

Asked: July 8, 2020In: Welding Technology

What type of microstructure is seen at the interface of metal and wall after casting and also welding?

Asked: July 7, 2020In: Welding Technology

anyone can explain how the hydrogen embrittlement occurs in low carbon steel during welding?

Askmemetallurgy OfficialGold

Asked: June 25, 2020In: Welding Technology

GATE MT 2018 Q45

The temperature profile (T in Kelvin) of an arc weld across its width is given as𝑇 = 2000 exp(−0.3𝑥2) where 𝑥 (in mm) is the distance from the weld centre. The melting point of the base material is 1500 K. ...Read more

The temperature profile (T in Kelvin) of an arc weld across its width is given as𝑇 = 2000 exp(−0.3𝑥²) where 𝑥 (in mm) is the distance from the weld centre. The melting point of the base material is 1500 K. The width of the fusion zone is _________(in mm tO two decimal places).

Askmemetallurgy OfficialGold

Asked: June 20, 2020In: Welding Technology

GATE MT 2018 Q16. Which of the following categories of materials is suitable as a filler for brazing of steel sheets?

Poll Results

11.69%(A)Epoxy resins ( 9 voters )

67.53%(B) Near-eutectic alloys ( 52 voters )

14.29%(C) Refractory alloys ( 11 voters )

6.49%(D) Large freezing range alloys ( 5 voters )

Based On 77 Votes

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Askmemetallurgy OfficialGold

Asked: June 19, 2020In: Welding Technology

GATE MT 2018 Q14.Which of the following welding processes is NOT suitable for joining thin metal sheets?

Poll Results

18.55%(A)Gas Metal Arc Welding ( 23 voters )

57.26%(B)Electro Slag Welding ( 71 voters )

12.9%(C)Electron Beam Welding ( 16 voters )

11.29%(D)Laser Beam Welding ( 14 voters )

Based On 124 Votes

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Askmemetallurgy OfficialGold

Asked: June 11, 2020In: Welding Technology

GATE MT 2019 Q24. An arc welding is performed at 400 Amperes, 20 V at a transverse speed of 5 mm/s. If the heat transfer efficiency is 0.6, the energy input per unit length( in J/mm, rounded off to the nearest integer ) during the process is ___________.

Askmemetallurgy OfficialGold

Asked: June 8, 2020In: Welding Technology

GATE MT 2019 Q10. Two blocks of same metal are to be welded. The configuration that will undergo least deformation after welding is :

GATE MT 2019 Q10. Two blocks of same metal are to be welded. The configuration that will undergo least deformation after welding is :

Poll Results

9.84%A ( 6 voters )

13.11%B ( 8 voters )

27.87%C ( 17 voters )

49.18%D ( 30 voters )

Based On 61 Votes

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Asked: May 23, 2020In: Welding Technology

Which welding process has highest temperature gradient?

Askmemetallurgy OfficialGold

Asked: May 10, 2020In: Welding Technology

GATE MT 2020 Q29. Two plates of composition. Fc—lo wt.% Ni and Fe – 20 wt.% Cr – 5 wt.% Ni are Fusion-welded using a filler rod of composition 20 wt, % Ni – 80 wt.% Cr. Contribution to dilution of the weld pool is 20% from each plate. The Ni content in the weld pool is (round off to the nearest integer).

GATE MT 2020 Q29. Two plates of composition. Fc—lo wt.% Ni and Fe – 20 wt.% Cr – 5 wt.% Ni are Fusion-welded using a filler rod of composition 20 wt, % Ni – 80 wt.% Cr. Contribution to dilution of the weld pool is 20% from each plate. The Ni content in the weld pool is (round off to the nearest integer).

AakashSinghCopper

Asked: May 2, 2020In: Welding Technology

Two blocks of same metal are to be welded. The configuration that will undergo the least distortion after welding is….

Two blocks of same metal are to be welded. The configuration that will undergo the least distortion after welding is….

Poll Results

15.25%A ( 9 voters )

13.56%B ( 8 voters )

25.42%C ( 15 voters )

45.76%D ( 27 voters )

Based On 59 Votes

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Askmemetallurgy OfficialGold

Asked: April 9, 2020In: Welding Technology

GATE MT 2016 Q21. Of the following welding processes [P] Laser Beam Welding [Q] Submerged Arc Welding [R] Metal Inert Gas Welding the width of the heat-affected zone in decreasing order is

Poll Results

10.99%(A) P > Q > R ( 10 voters )

65.93%(B) Q > R > P ( 60 voters )

10.99%(C) R > P > Q ( 10 voters )

12.09%(D) P > R > Q ( 11 voters )

Based On 91 Votes

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Santosh PrakashIron

Asked: April 8, 2020In: Welding Technology

During welding overmatched electrodes are used for SMAW welding. These are due to losses during welding. Can someone how one can reduce the overmatch in SMAW welding

Askmemetallurgy OfficialGold

Asked: April 4, 2020In: Welding Technology

GATE MT 2015 Q56. Determine the correctness or otherwise of the following assertion [a]and reason[R] Assertion: In a pure metal weld, elastic modulus in heat affected zone (HAZ) is the same as that in the base metal. Reason: Coarse grained microstructrue in the HAZ results in lower hardenss.

Poll Results

9.09%(A) Both [a] and [r] are true and [r] is the correct reason of [a]. ( 3 voters )

72.73%(B) Both [a] and [r] are true and [r] is not the correct reason of [a]. ( 24 voters )

15.15%(c) Both [a] and [r] are false. ( 5 voters )

3.03%(D) [a] is true but [r] is false. ( 1 voter )

Based On 33 Votes

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