GATE ME

Welding Process

Production Engineering

(Past Years Questions)

Marks 1

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In an arc welding process, welding speed is doubled. Assuming all other process parameters to be constant, the cross se...
GATE ME 2017 Set 1
Under optimal conditions of the process the temperatures experienced by a copper work piece in fusion welding, brazing a...
GATE ME 2016 Set 1
Which two of the following joining processes are autogeneous? $$(i)$$ Diffusion welding $$(ii)$$ Electro slag welding $$...
GATE ME 2015 Set 3
In a linear arc welding process, the heat input per unit length is inversely proportional to
GATE ME 2015 Set 1
Within the Heat Affected Zone (HAZ) in a fusion welding process, the work material undergoes
GATE ME 2014 Set 4
The major difficulty during welding of aluminium is due to its
GATE ME 2014 Set 1
In solid-state welding, the contamination layers between the surfaces to be welded are removed by
GATE ME 2014 Set 1
Which one among the following welding processes uses non-consumable electrode?
GATE ME 2011
Which of the following is a solid state welding process.
GATE ME 2007
The strength of a brazed joint
GATE ME 2005
In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
GATE ME 2003
The temperature of a carburizing flame in gas welding is _______ that of a neutral or an oxidizing flame.
GATE ME 2002
Which of the following arc welding processes does not use consumable electrode
GATE ME 2002
Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness ch...
GATE ME 2001
Preheating before welding is done to
GATE ME 1996
The electrodes used in $$arc$$ welding are coated. This coating is not expected to
GATE ME 1994
The ratio of acetylene to oxygen is approximately ................ for neutral flame used in gas welding
GATE ME 1994
Generally cylindrical parts produced by powder metallurgy should not have non uniform cross section and a length to diam...
GATE ME 1994
In $$DC$$ welding, the straight polarity (electrode negative) results in
GATE ME 1993
For resistance spot welding of $$1.5$$ $$mm$$ thick steel sheets, the current required is of the order
GATE ME 1992
In an explosive welding process, the ..................... (maximum/minimum) velocity of impact is fixed by the velocity...
GATE ME 1992
For gas welding a particular job using a neutral oxy-acetylene flame the acetylene consumption was $$10$$ ltrs. The oxyg...
GATE ME 1991
Penetration is increased by
GATE ME 1990
At small variations of are length at operating conditions, the manual metal are welding transformer provides nearly
GATE ME 1990

Marks 2

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Spot welding of two steel sheets each $$2$$ $$mm$$ thick carried out successfully by passing $$4$$ $$kA$$ of current for...
GATE ME 2016 Set 3
The voltage - length characteristic of a direct current arc in an arc welding process is $$V=$$ $$(100+40l),$$ where $$l...
GATE ME 2016 Set 2
During a $$TIG$$ welding process, the arc current and arc voltage were $$50$$ $$A$$ and $$60$$ $$V,$$ respectively, when...
GATE ME 2015 Set 2
A $$DC$$ welding power source has a linear voltage-current $$(V$$-$$I)$$ characteristic with open circuit voltage of $$8...
GATE ME 2015 Set 1
A butt weld joint is developed on steel plates having yield and ultimate tensile strength of $$500$$ $$MPa$$ and $$700$$...
GATE ME 2014 Set 4
For spot welding of two steel sheets (base metal) each of $$3$$ $$mm$$ thickness, welding current of $$10000$$ $$A$$ is ...
GATE ME 2014 Set 3
In a $$DC$$ $$arc$$ welding operating, the length characteristic was obtained as $${V_{arc}} = 20 + 5l$$ where the $$arc...
GATE ME 2012
Two steel bars each of diameter $$10mm$$ are coaxially friction welded end to end at an axial pressure of $$200MPa$$ and...
GATE ME 2010
In arc welding of a butt joint, the welding speed is to be selected such that highest cooling rate is achieved. Melting ...
GATE ME 2008
A $$DC$$ welding machine with a linear power source characteristic provides open circuit voltage of $$80V$$ and short ci...
GATE ME 2007
Two metallic sheets, each of $$2.0$$ $$mm$$ thickness are welded in lap joint configuration by resistance spot welding ...
GATE ME 2007
In arc welding process, the voltage and current are $$25V$$ and $$300A$$ respectively. The arc heat transfer efficiency ...
GATE ME 2006
Spot welding of two $$1$$ $$mm$$ thick sheets of steel (density $$ = 8000kg/{m^3}$$ ) is carried out successfully by pas...
GATE ME 2005
Two 1 mm thick steel sheets are to be spot welded at a current of $$5000$$ $$A.$$ Assuming effective resistance to be $...
GATE ME 2004
Match the following ...
GATE ME 2003
resistance spot welding is performed on two plates of $$1.5$$ $$mm$$ thickness with $$6$$ $$mm$$ diameter electrode, usi...
GATE ME 2001
...
GATE ME 1996
...
GATE ME 1991

Marks 5

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The arc - voltage characteristics of a $$DC$$ power source has a linear power source characteristic of $$V=20+40L,$$ wh...
GATE ME 2003
Two different pairs of sheets of same material are welded by resistance-spot welding. In one pair, the average radius $$...
GATE ME 2000
For butt welding $$40mm$$ thick steel plates, when the expected quantity of such jobs is $$5000$$ per month over a perio...
GATE ME 1999
In butt welding operation on plates, the heat input necessary is given by $$Q = 8\,K\,{T_c}\,t\,\,\,\left[ {0.2 + {{Vb...
GATE ME 1999
The voltage-arc length characteristics of a $$DC$$ arc is given by $$V=20+4L.$$ Where $$L$$ is in $$mm$$. During a weldi...
GATE ME 1998
The voltage-arc length characteristics of a $$DC$$ arc is given by $$V=20+4L.$$ Where $$L$$ is in $$mm$$. During a weldi...
GATE ME 1998
Welding of $$C40$$ steel plate of $$10mm$$ thickness required a current of $$16$$amps, while it was $$360$$amps when the...
GATE ME 1997
The cross section weld bead is shown in fig the profile of the bead and the fusion zone are taken circular for convenien...
GATE ME 1996
A low carbon steel is to be welded by the manual metal arc welding process using a linear $$V$$-$$I$$ characteristic $$D...
GATE ME 1992
Manual metal arc welding is to be used for welding two plates each measuring $$800 \times 200 \times 19mm.$$ Given that ...
GATE ME 1990
An arc welding $$DC$$ power source has a linear power source characteristic with open circuit voltage $${V_O} = \,\,80$$...
GATE ME 1989

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