API 577 EXAM STUDY GUIDE
None! Number of welds to RT is established by the primary code - Answers - How
many welds does 577 require to be RT'd
Arc blow - Answers - Deflection of an arc from normal path because of opposing
magnetic forces
Arc length - Answers - Distance from the tip of the welding electrode to the adjacent
surface of the weld pool
Autogenous - Answers - Welds made without filler metal
Backing - Answers - Material or device placed on back side of a joint, to support and
retain weld metal
Defect - Answers - A discontinuity that does not meet acceptance criteria, term
designates rejecability
Discontinuity - Answers - The interruption of the typical structure of a material,
discontinuity not necessarily a defect
Inclusion - Answers - Entrapped foreign solid material, such as slag, flux, tungsten, or
oxide
Undercut - Answers - A groove welded into the base metal adjacent to the weld toe or
weld root and left unfilled by weld metal
Based on nature of the non-conformance - Answers - Corrective action of non-
conformance
SMAW - Answers - Which welding process is most widely used
SMAW process - Answers - Arc between a covered electrode and weld pool. Heat of
arc comes from tip of a consumable covered electrode. Shielding comes from
decomposition of the electrode coating.
SMAW (basic functions of electrode coating) - Answers - Shielding gas, prevent
excessive grain growth, slag blanket to protect weld, sometime provides alloy elements
GMAW-short circuit - Answers - Which welding process is "fast freezing and prone to
have LOF"
GMAW-spray transfer - Answers - Which welding process uses a direct stream of
discrete drops
None! Number of welds to RT is established by the primary code - Answers - How
many welds does 577 require to be RT'd
Arc blow - Answers - Deflection of an arc from normal path because of opposing
magnetic forces
Arc length - Answers - Distance from the tip of the welding electrode to the adjacent
surface of the weld pool
Autogenous - Answers - Welds made without filler metal
Backing - Answers - Material or device placed on back side of a joint, to support and
retain weld metal
Defect - Answers - A discontinuity that does not meet acceptance criteria, term
designates rejecability
Discontinuity - Answers - The interruption of the typical structure of a material,
discontinuity not necessarily a defect
Inclusion - Answers - Entrapped foreign solid material, such as slag, flux, tungsten, or
oxide
Undercut - Answers - A groove welded into the base metal adjacent to the weld toe or
weld root and left unfilled by weld metal
Based on nature of the non-conformance - Answers - Corrective action of non-
conformance
SMAW - Answers - Which welding process is most widely used
SMAW process - Answers - Arc between a covered electrode and weld pool. Heat of
arc comes from tip of a consumable covered electrode. Shielding comes from
decomposition of the electrode coating.
SMAW (basic functions of electrode coating) - Answers - Shielding gas, prevent
excessive grain growth, slag blanket to protect weld, sometime provides alloy elements
GMAW-short circuit - Answers - Which welding process is "fast freezing and prone to
have LOF"
GMAW-spray transfer - Answers - Which welding process uses a direct stream of
discrete drops
