28) In the process of soldering, you have noticed solder not sticking to sufficiently heated copper soldering bit when rubbed over solder bar. What step do you take to overcome the problem ?
Answer is:
Clean the bit thoroughly
Related Welding and Soldering MCQ - Turner (Set-1) with Answers
Answer is:
Tin
Answer is:
above 427 Degree C but lower than that of base metal is used
Explanation:
Brazing is a process of joining metals by using layer of nonferrous metal between the surface to be joined. The alloy used for brazing is known as spelter (combination of copper and zinc). Brazing is a process, in which a non-ferrous filler metal having a melting point above 427 degree Centigrade but lower than that of base metal is used.
