54) For ultrasonic welding, the thickness of the metal is usually restricted to
Answer is:
3 mm
Related ISRO Technician-B Welder Question Paper - 2017 (Set -1) with Answer Key
Answer is:
Alternating current
Explanation:
In arc welding process, better arc stability is achieved with Alternating current.
Answer is:
Oxy-acetylene
Answer is: