Recent questions tagged principles-of-welding / GO Mechanical

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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)

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 e...

Arjun

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Arjun asked Feb 9, 2019

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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

Which one of the following welding methods provides the highest heat flux $(W/mm^2)$?Oxy-acetylene gas weldingTungsten inert gas weldingPlasma arc weldingLaser beam weldi...

Arjun

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Arjun asked Feb 9, 2019

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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

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...

Andrijana3306

1.5k points

Andrijana3306 asked Mar 19, 2018

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

The type of weld represented by the shaded region in the figure isgroovespotfilletplug

Arjun

28.5k points

Arjun asked Feb 17, 2018

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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 $50\%$

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\...

Arjun

28.5k points

Arjun asked Feb 26, 2017

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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

The welding process which uses a blanket of fusible granular flux istungsten inert gas weldingsubmerged arc weldingelectroslag weldingthermit welding

Arjun

28.5k points

Arjun asked Feb 24, 2017

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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 $T_{\text{welding}} > T_{\text{soldering}}> T_{\text{brazing}}$ ... $T_{\text{welding}} > T_{\text{brazing}} > T_{\text{soldering}}$

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_{...

Arjun

28.5k points

Arjun asked Feb 24, 2017

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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)

Which two of the following joining processes are autogeneous?Diffusion weldingElectroslag weldingTungsten inert gas weldingFriction welding(i) and (iv)(ii) and (iii)(ii) ...

Arjun

28.5k points

Arjun asked Feb 24, 2017

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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 $40.00$ $44.72$ $55.90$ $62.25$

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...

Arjun

28.5k points

Arjun asked Feb 24, 2017

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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_________

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 maximu...

Arjun

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Arjun asked Feb 24, 2017

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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

In a linear arc welding process, the heat input per unit length is inversely proportional towelding currentwelding voltagewelding speedduty cycle of the power source

Arjun

28.5k points

Arjun asked Feb 24, 2017

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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

Within the Heat Affected Zone (HAZ) in a fusion welding process, the work material undergoesmicrostructural changes but does not meltneither melting nor microstructural c...

Arjun

28.5k points

Arjun asked Feb 19, 2017

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

Match the CORRECT pairs:$\begin{array}{llll} & \text{Process} & & \text{Characteristics/Applications} \\ P. & \text{Friction Welding} & 1. & \text{Non-consumable electrod...

piyag476

1.4k points

piyag476 asked Feb 19, 2017