Welding processes and thier features

Question

Match List – II (Welding processes) with List – II (Features) and select the correct answer:

                    List – I                        List – II

A. Ultrasonic welding                 1. Gas heated to lionized condition for conduction of electric current

B. Electron beam welding          2. High frequency and high intensity vibrations

C. Plasma arc welding               3. Concentrated stream of high – energy electrons

                                                   4. Exothermal chemical reaction

Codes :      A    B    C

           (a)   1     2    4

           (b)   4     3    1

           (c)   2     1    4

           (d)   2     3    1