Question

When the Plasma Beam machining process came into the industrial world?

(a) 1920s

(b) 1930s

(c) 1950s

(d) 1970s

The question was asked in unit test.

My enquiry is from Plasma Beam Machining-Introduction And Machining system topic in section Thermal Processes of Advanced Machining

Answer 1

The correct choice is (c) 1950s

The explanation is: The Plasma Beam machining process came into the industrial world in the early 1950s as an alternative for the oxy-gas flame cutting process.