M

Mr. Dubey • 52.30K Points
Coach 

Q. Which of the following holds true for friction welding?

(A) hazardous fumes are generated during the process
(B) argon is used as a shielding gas
(C) it is a power consuming process
(D) there are no solidification defects in the welded parts
Correct : Option (D)

Explanation: 
 following are the few reasons to consider friction welding over other techniques:

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