Welding Process · Production Engineering · GATE ME

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Marks 1

GATE ME 2024
The most suitable electrode material used for joining low alloy steels using Gas Metal Arc Welding (GMAW) process is
GATE ME 2017 Set 1
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 w...
GATE ME 2016 Set 1
Under optimal conditions of the process the temperatures experienced by a copper work piece in fusion welding, brazing and soldering are such that
GATE ME 2015 Set 3
Which two of the following joining processes are autogeneous? $$(i)$$ Diffusion welding $$(ii)$$ Electro slag welding $$(iii)$$ Tungsten inert gas wel...
GATE ME 2015 Set 1
In a linear arc welding process, the heat input per unit length is inversely proportional to
GATE ME 2014 Set 1
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 4
Within the Heat Affected Zone (HAZ) in a fusion welding process, the work material undergoes
GATE ME 2011
Which one among the following welding processes uses non-consumable electrode?
GATE ME 2007
Which of the following is a solid state welding process.
GATE ME 2005
The strength of a brazed joint
GATE ME 2003
In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
GATE ME 2002
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 2001
Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
GATE ME 1996
Preheating before welding is done to
GATE ME 1994
The electrodes used in $$arc$$ welding are coated. This coating is not expected to
GATE ME 1994
Generally cylindrical parts produced by powder metallurgy should not have non uniform cross section and a length to diameter ratio exceeding . . . . ....
GATE ME 1994
The ratio of acetylene to oxygen is approximately ................ for neutral flame used in gas welding
GATE ME 1993
In $$DC$$ welding, the straight polarity (electrode negative) results in
GATE ME 1992
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 of sound in the ................
GATE ME 1991
For gas welding a particular job using a neutral oxy-acetylene flame the acetylene consumption was $$10$$ ltrs. The oxygen consumption from the cylind...
GATE ME 1990
Penetration is increased by
GATE ME 1990
At small variations of are length at operating conditions, the manual metal are welding transformer provides nearly

Marks 2

GATE ME 2024
In an arc welding process, the voltage and current are 30 V and 200 A, respectively. The cross-sectional area of the joint is 20 mm2 and the welding s...
GATE ME 2016 Set 2
The voltage - length characteristic of a direct current arc in an arc welding process is $$V=$$ $$(100+40l),$$ where $$l$$ is the length of the arc in...
GATE ME 2016 Set 3
Spot welding of two steel sheets each $$2$$ $$mm$$ thick carried out successfully by passing $$4$$ $$kA$$ of current for $$0.2$$ seconds through the e...
GATE ME 2015 Set 2
During a $$TIG$$ welding process, the arc current and arc voltage were $$50$$ $$A$$ and $$60$$ $$V,$$ respectively, when the welding speed was $$150$$...
GATE ME 2015 Set 1
A $$DC$$ welding power source has a linear voltage-current $$(V$$-$$I)$$ characteristic with open circuit voltage of $$80V$$ and a short circuit curre...
GATE ME 2014 Set 4
A butt weld joint is developed on steel plates having yield and ultimate tensile strength of $$500$$ $$MPa$$ and $$700$$ $$MPa,$$ respectively. The th...
GATE ME 2014 Set 3
For spot welding of two steel sheets (base metal) each of $$3$$ $$mm$$ thickness, welding current of $$10000$$ $$A$$ is applied for $$0.2$$ $$s$$. The...
GATE ME 2012
In a $$DC$$ $$arc$$ welding operating, the length characteristic was obtained as $${V_{arc}} = 20 + 5l$$ where the $$arc$$ length $$l$$ was varied bet...
GATE ME 2010
Two steel bars each of diameter $$10mm$$ are coaxially friction welded end to end at an axial pressure of $$200MPa$$ and rotational speed of $$400rpm$...
GATE ME 2008
In arc welding of a butt joint, the welding speed is to be selected such that highest cooling rate is achieved. Melting efficiency and heat transfer e...
GATE ME 2007
A $$DC$$ welding machine with a linear power source characteristic provides open circuit voltage of $$80V$$ and short circuit current of $$800A,$$ dur...
GATE ME 2007
Two metallic sheets, each of $$2.0$$ $$mm$$ thickness are welded in lap joint configuration by resistance spot welding at a welding current of $$10$$...
GATE ME 2006
In arc welding process, the voltage and current are $$25V$$ and $$300A$$ respectively. The arc heat transfer efficiency is $$0.85$$ and welding speed ...
GATE ME 2005
Spot welding of two $$1$$ $$mm$$ thick sheets of steel (density $$ = 8000kg/{m^3}$$ ) is carried out successfully by passing a certain amount of curre...
GATE ME 2004
Two 1 mm thick steel sheets are to be spot welded at a current of $$5000$$ $$A.$$ Assuming effective resistance to be $$200$$ micro-ohms and current ...
GATE ME 2003
Match the following ...
GATE ME 2001
resistance spot welding is performed on two plates of $$1.5$$ $$mm$$ thickness with $$6$$ $$mm$$ diameter electrode, using $$15000$$ $$A$$ current for...
GATE ME 1996
...
GATE ME 1991
...

Marks 5

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