Which of the following are the different shielded plasmas used in PBM?
(a) Gas-shielded plasma
(b) Water-shielded plasma
(c) Gas-shielded & Water-shielded plasma
(d) None of the mentioned
The question was posed to me in an international level competition.
My question is from Plasma Beam Machining-Introduction And Machining system in chapter Thermal Processes of Advanced Machining