Question:-
In which one of the following welding techniques is vacuum environment required?
Option (A)
Ultrasonic welding
Option (B)
Laser beam welding
Option(C)
Plasma arc welding
Option(D)
Electron beam welding
Correct Option:
(D)
Question Solution:
If the electron beam welding is not done in the vacuum then in the electrons will have a impact with the air particles and they will loss their velocity and the kinetic energy.
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