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Which of the following statement(s) is/are true regarding butt welding? 1. Flash butt welding is a combination of resistance, arc and pressure welding 2. Upset butt welding is used for welding rods 3. Percussion Welding is a self timing spot welding method 4. Aluminium alloys are flash welded
Projection welding & stud welding is categorised as the __________ welding.
Projection welding & stud welding is categorised as the __________ welding.
Which two of the following joining processes are autogenous? i. Diffusion welding ii. Electroslag welding iii. Tungsten inert gas welding iv. Friction welding
What is the distance of centre of projection from the projection plane in perspective projection?
Projection TVs are available in two main configurations called front projection and rear projection.
In _________ the parallel projection rays are not perpendicular to the viewing plane as with orthographic projection, but strike the projection plane at an angle other than ninety degrees.
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?