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Erosion-corrosion is a description for the damage that occurs when corrosion contributes to erosion by removing protective films or scales, or by exposing the metal surface to further ________ under the combined action of corrosion-erosion.
Erosion-corrosion is a description for the damage that occurs when corrosion contributes to erosion by removing protective films or scales, or by exposing the metal surface to further ________ under the combined action of corrosion-erosion.A . StressB . CorrosionC . OxidationD . None of the aboveView AnswerAnswer: B
General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activities is called ________.
General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activities is called ________.A . Flue Gas CorrosionB . Atmospheric CorrosionC . Cooling Water CorrosionD . None of the AboveE . All of the AboveView AnswerAnswer: C
With decarburization, the decarburized layer will be free of carbide phases. Carbon steel will be ______.
With decarburization, the decarburized layer will be free of carbide phases. Carbon steel will be ______.A . AnnealedB . QuenchedC . Pure ironD . None of the aboveView AnswerAnswer: C
__________ caustic concentrations and ________ temperatures increase the likelihood and severity of cracking with caustic embrittlement.
__________ caustic concentrations and ________ temperatures increase the likelihood and severity of cracking with caustic embrittlement.A . Increasing, DecreasingB . Decreasing, IncreasingC . Decreasing, DecreasingD . Increasing, IncreasingView AnswerAnswer: D
Corrosion from oxygen in boiler feed water usually creates:
Corrosion from oxygen in boiler feed water usually creates:A . Uniform corrosion.B . Isolated pitting.C . Intergranular cracking.D . Transgranular cracking.E . Hard and brittle zones.View AnswerAnswer: B
Which of these materials is susceptible to 885º F embrittlement?
Which of these materials is susceptible to 885ยบ F embrittlement?A . 400 Series SSB . Duplex SSC . 5Cr-1MoD . Both A and BView AnswerAnswer: D
________ greatly increases the probability and severity of blistering, HIC and SOHIC damage.
________ greatly increases the probability and severity of blistering, HIC and SOHIC damage.A . AcidsB . CausticsC . AminesD . CyanidesView AnswerAnswer: D
Mitigation of CUI is best achieved by _________.
Mitigation of CUI is best achieved by _________.A . A properly documented inspection programB . A properly installed insulation systemC . A properly applied coating systemD . A properly documented NDE programView AnswerAnswer: C
For a specific material, HTHA is dependent on temperature, hydrogen partial pressure, time and _________.
For a specific material, HTHA is dependent on temperature, hydrogen partial pressure, time and _________.A . StressB . PressureC . VelocityD . Alloy compositionView AnswerAnswer: A
Which of the following materials are generally not suitable for HF service?
Which of the following materials are generally not suitable for HF service?A . 300 Series SSB . Carbon steelC . 400 Series SSD . Both A and CView AnswerAnswer: D
