Technician A says that low hydrogen arc welding electrodes should be used when it is necessary to weld on a hardened steel frame rail. Technician B says that tempered steel rails can be MIG welded using appropriately rated wire in less time and lower risk of comebacks. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: A
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