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GATE2019 ME-2: 51
A gas tungsten arc welding operation is performed using a current of $250 \: A$ and an arc voltage of $20 \: V$ at a welding speed of $5 \: mm/s$. Assuming that the arc efficiency is $70 \%$, the net heat input per unit length of the weld will be _________$kJ/mm$ (round off to one decimal place)

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 9, 2019

by Arjun

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GATE2019 ME-1: 14
Which one of the following welding methods provides the highest heat flux $(W/mm^2)$? Oxy-acetylene gas welding Tungsten inert gas welding Plasma arc welding Laser beam welding

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 9, 2019

by Arjun

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GATE ME 2012 | Question: 39
In a DC arc welding operation, the voltage-arc length characteristic was obtained as $V_{arc} = 20+5l$ where the arc length $l$ was varied between $5$ mm and $7$ mm. Here $V_{arc}$ denotes the arc voltage in $Volts$. The arc current was varied from $400$ A and $500$ A. ... for the welding operation are $45$ V, $450$ A $75$ V, $750$ A $95$ V, $950$ A $150$ V, $1500$ A

Andrijana3306 asked in Materials, Manufacturing and Industrial Engineering Mar 20, 2018

by Andrijana3306

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GATE2018-1-12
The type of weld represented by the shaded region in the figure is groove spot fillet plug

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 17, 2018

by Arjun

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GATE2017 ME-1: 23
In an arc welding process, welding speed is doubled. Assuming all other process parameters to be constant, the cross-sectional area of the weld bead will Increase by $25\%$ Increase by $50\%$ Reduce by $25\%$ Reduce by $50\%$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 27, 2017

by Arjun

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GATE2016-2-22
The welding process which uses a blanket of fusible granular flux is tungsten inert gas welding submerged arc welding electroslag welding thermit welding

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

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GATE2016-1-21
Under optimal conditions of the process the temperatures experienced by a copper work piece in fusion welding, brazing and soldering are such that $T_{\text{welding}} > T_{\text{soldering}}> T_{\text{brazing}}$ ... $T_{\text{welding}} > T_{\text{brazing}} > T_{\text{soldering}}$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

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GATE2015-3-21
Which two of the following joining processes are autogeneous? Diffusion welding Electroslag welding Tungsten inert gas welding Friction welding (i) and (iv) (ii) and (iii) (ii) and (iv) (i) and (iii)

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

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GATE2015-2-51
During a TIG welding process, the arc current and arc voltage were $50$ $A$ and $60$ $V$, respectively, when the welding speed was $150$ $mm/min$. In another process, the TIG welding is carried out at a welding speed of $120$ $mm/min$ at the same arc voltage and ... so that weld quality remains the same. The welding current (in $A$) for this process is $40.00$ $44.72$ $55.90$ $62.25$

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

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GATE2015-1-31
A DC welding power source has a linear voltage-current ($V$-$I$) characteristic with open circuit voltage of $80$ $V$ and a short circuit current of $300$ $A$. For maximum arc power, the current (in Amperes) should be set as_________

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

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GATE2015-1-24
In a linear arc welding process, the heat input per unit length is inversely proportional to welding current welding voltage welding speed duty cycle of the power source

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 24, 2017

by Arjun

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GATE Mechanical 2014 Set 4 | Question: 20
Within the Heat Affected Zone (HAZ) in a fusion welding process, the work material undergoes microstructural changes but does not melt neither melting nor microstructural changes both melting and microstructural changes after solidification melting and retains the original microstructure after solidification

Arjun asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2017

by Arjun

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GATE ME 2013 | Question: 11
Match the CORRECT pairs: ... $P-4; Q-2; R-3; S-1$ $P-2; Q-3; R-4; S-1$ $P-2; Q-4; R-1; S-3$

piyag476 asked in Materials, Manufacturing and Industrial Engineering Feb 19, 2017

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