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With sour water corrosion, streams with a pH below ________ indicate the presence of a strong acid.
With sour water corrosion, streams with a pH below ________ indicate the presence of a strong acid.A . 7.0B . 5.5C . 6.0D . 4.5View AnswerAnswer: D
Nitriding is usually confined to the surface of most components and will have a dull, ______ appearance. In more advanced stages, the material will exhibit very hard surface hardness.
Nitriding is usually confined to the surface of most components and will have a dull, ______ appearance. In more advanced stages, the material will exhibit very hard surface hardness.A . GrayB . BlackC . BrownD . WhiteView AnswerAnswer: A
Sigma phase occurs in Ferritic, martensitic, austenitic and duplex stainless steels when exposed to temperatures in the range of _____.
Sigma phase occurs in Ferritic, martensitic, austenitic and duplex stainless steels when exposed to temperatures in the range of _____.A . 537º C C 954º CB . 621º C C 926º CC . 676º C C 760º CD . 584º C C 840º CView AnswerAnswer: A
Formation of a metallurgical phase known as sigma phase results in a loss of _________ in some stainless steels as a result of high temperature exposure.
Formation of a metallurgical phase known as sigma phase results in a loss of _________ in some stainless steels as a result of high temperature exposure.A . DuctilityB . Fracture toughnessC . EmbrittlementD . None of the aboveView AnswerAnswer: B
________ and _______ damage develop without applied or residual stress so that PWHT will not prevent them from occurring.
________ and _______ damage develop without applied or residual stress so that PWHT will not prevent them from occurring.A . SOHIC, BlisteringB . SCC, SOHICC . HIC, SCCD . Blistering, HICView AnswerAnswer: D
________ is a form of carbon that may promote carburization, particularly during decoke cycles where temperatures exceed the normal operating temperatures.
________ is a form of carbon that may promote carburization, particularly during decoke cycles where temperatures exceed the normal operating temperatures.A . Carbonic acidB . CokeC . Crude oilD . None of the aboveView AnswerAnswer: B
Which of these materials are susceptible to brittle fracture?
Which of these materials are susceptible to brittle fracture?A . Carbon steelsB . Low alloy steelsC . 400 Series SSD . All of the aboveView AnswerAnswer: D
Liquid metal embrittlement can occur if 300 Series SS comes in contact with molten _______.
Liquid metal embrittlement can occur if 300 Series SS comes in contact with molten _______.A . CopperB . MercuryC . ZincD . LeadView AnswerAnswer: C
Amine cracking is ________ likely to occur in lean MEA and DEA services than in MDEA and DIPA services.
Amine cracking is ________ likely to occur in lean MEA and DEA services than in MDEA and DIPA services.A . MoreB . LessC . AsD . None of the aboveView AnswerAnswer: A
Amine units are used in refineries to remove H²S, CO² and _________ from process streams originating in many units including the coker, crude, FCC and hydrogen.
Amine units are used in refineries to remove H²S, CO² and _________ from process streams originating in many units including the coker, crude, FCC and hydrogen.A . NA²B . Cl²C . MercaptansD . None of the aboveView AnswerAnswer: C
