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In TIG welding, thoriated tungsten electrodes are used, because it
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
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 operating temperature of thoriated tungsten emitter?
Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.
In welding magnesium with TIG arc welding, direct current with ________ is used.
In TIG arc welding, the welding zone is shielded by an atmosphere of
In welding copper alloys with TIG arc welding
What is the only difference between Plasma arc welding and TIG welding?
TIG welding of thin plates will give steeper thermal gradients than submerged arc welding of thick plates, the latter process will have the higher heat input.