Projection welding is a

A Continuous spot welding process
B Multi-spot welding process
C Arc welding process
D Process used for joining round bars

Correct Answer: Multi-spot welding process

Projection welding is a modification of spot welding.
In this process, the weld is localized by means of raised sections, or projections, on one or both of the workpieces to be joined.
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Related Questions

In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
A Same
B Less
C More
D None of these
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
A Same
B Less
C More
D None of these
If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?
A Forehand welding
B Flux cored ARC welding
C Electro slag welding
D Pulsed spray welding
In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as
A Fusion
B Reverse polarity
C Forward welding
D Direct polarity
For the given values of initial velocity of projection and angle of inclination of the plane, the maximum range for a projectile projected upwards will be obtained, if the angle of projection is
A $$\alpha = \frac{\pi }{4} - \frac{\beta }{2}$$
B $$\alpha = \frac{\pi }{2} + \frac{\beta }{2}$$
C $$\alpha = \frac{\beta }{2} - \frac{\pi }{2}$$
D $$\alpha = \frac{\pi }{4} - \frac{\beta }{4}$$
E $$\alpha = \frac{\pi }{2} - \frac{\beta }{2}$$
The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.
A Less than
B More than
C Equal to
D None of these
The Cartesian equation of trajectory is (where u = Velocity of projection, $$\alpha $$ = Angle of projection and x, y = Co-ordinates of any point on the trajectory after t seconds.)
A $${\text{y}} = \frac{{{\text{g}}{{\text{x}}^2}}}{{2{{\text{u}}^2}{{\cos }^2}\alpha }} + {\text{x}}\tan \alpha $$
B $${\text{y}} = \frac{{{\text{g}}{{\text{x}}^2}}}{{2{{\text{u}}^2}{{\cos }^2}\alpha }} - {\text{x}}\tan \alpha $$
C $${\text{y}} = {\text{x}}\tan \alpha - \frac{{{\text{g}}{{\text{x}}^2}}}{{2{{\text{u}}^2}{{\cos }^2}\alpha }}$$
D $${\text{y}} = {\text{x}}\tan \alpha + \frac{{{\text{g}}{{\text{x}}^2}}}{{2{{\text{u}}^2}{{\cos }^2}\alpha }}$$
The angle of projection for a range is equal to the distance through which the particle would have fallen in order to acquire a velocity equal to the velocity of projection, will be
A [[[
In TIG arc welding, the welding zone is shielded by an atmosphere of
A Helium gas
B Argon gas
C Either (A) or (B)
D None of these
For gas welding, the pressure desired at the welding torch for acetylene is
A 7 to 103 kN/m2
B 70 to 280 kN/m2
C 280 to 560 kN/m2
D 560 to 840 kN/m2

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