Q109
For arc welding
A.
Alternating current with high frequency is used
B.
Alternating current with low frequency is used
C.
Direct current is used
AnswerD.
Any one of these
Answer: Option C
Solution
Answer: Option C
Solution:
Arc welding is a welding process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals when cool result in a binding of the metals.For arc welding direct current is used.