It is seen that for crystal growth rate, R, to keep pace with the weld – McqOptions

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1.	It is seen that for crystal growth rate, R, to keep pace with the welding speed, 3m/s, the condition must be met that for this to happen is____ (wetting angle 60 )
A.	R = 1.5m/s
B.	R = 3m/s
C.	R = 0
D.	R = 1.33m/s
Answer» B. R = 3m/s

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