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1)The risk of hydrogen cracking is greater when MMA welding:
A) C-Mn steels.
B) Austenitic stainless steel.
C) Low alloy steels for elevated temperature service.
D) Low carbon steels for cryogenical service.
2)Initiation of a TIG arc using a high frequency, spark may not be allowed because it:
A) Often causes tungsten inclusions.
B) Can damage electronic equipment.
C) Is an electrical safety hazard.
D) Often causes stop/start porosity.
Low alloy thường xãy ra nứt HIC nhiều hơn so với các đáp án còn lại.
Spark / Scratch-Start gây ra ngậm Tungsten.
Disclaimer: Weldinginspections.net is based on information from multiple sources and our experience with welding and inspection scopes. It is not a replacement for manufacturers directions and is only to provide reminders for inspector.