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Alloy 400 is susceptible to LME when it comes in contact with molten ________.
Alloy 400 is susceptible to LME when it comes in contact with molten ________.A . CadmiumB . MercuryC . ZincD . LeadView AnswerAnswer: B
Cooling water corrosion and __________ are closely related and should be considered together.
Cooling water corrosion and __________ are closely related and should be considered together.A . StressB . VelocityC . FoulingD . ErosionView AnswerAnswer: C
300 Series SS can suffer pitting corrosion, crevice corrosion and ________ in fresh, blackish and salt water.
300 Series SS can suffer pitting corrosion, crevice corrosion and ________ in fresh, blackish and salt water.A . General corrosionB . OxidationC . SCCD . None of the aboveView AnswerAnswer: C
Which of the following materials are the least susceptible to caustic embrittlement?
Which of the following materials are the least susceptible to caustic embrittlement?A . Carbon steelB . Stainless steelC . 9Cr-0.5 MoD . Nickel base alloysView AnswerAnswer: D
Increasing the chromium in steels offers no major improvement in resistance to CO² corrosion until a minimum of __________ is reached.
Increasing the chromium in steels offers no major improvement in resistance to CO² corrosion until a minimum of __________ is reached.A . 9%B . 12%C . 5%D . 7%View AnswerAnswer: B
High strength, low allow steels such as A193-B7 bolts and compressor parts are susceptible to hydrogen stress cracking. A193-B7M bolts are susceptible if __________.
High strength, low allow steels such as A193-B7 bolts and compressor parts are susceptible to hydrogen stress cracking. A193-B7M bolts are susceptible if __________.A . ExposedB . OvertorquedC . Double nuttedD . None of the aboveView AnswerAnswer: B
Carbonate stress corrosion cracking is the term applied to surface breaking or cracks that occur adjacent to carbon steel welds under the combined action of ____________ and ___________ in carbonate containing systems.
Carbonate stress corrosion cracking is the term applied to surface breaking or cracks that occur adjacent to carbon steel welds under the combined action of ____________ and ___________ in carbonate containing systems.A . Temperature, stressB . Tensile stress, corrosionC . Corrosion, velocityD . Tensile stress, velocityView AnswerAnswer: B
Which of the methods are effective for finding thermal fatigue cracks?
Which of the methods are effective for finding thermal fatigue cracks?A . MTB . PTC . VTD . All of the aboveView AnswerAnswer: D
What test is used to determine a material’s toughness?
What test is used to determine a material’s toughness?A . Charpy impact testB . Guided bend testC . MetallographyD . Tension testE . Physical fitness testView AnswerAnswer: A
Low creep ductility is __________ severe in high tensile strength materials and welds.
Low creep ductility is __________ severe in high tensile strength materials and welds.A . MoreB . LessC . UsuallyD . NotView AnswerAnswer: A
