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Caustic embrittlement is a form of stress corrosion cracking characterized by surface-initiated cracks that occur in piping and equipment exposed to caustic, primarily adjacent to non-PWHT welds. Which of the following materials is the most resistant to embrittlement?
Caustic embrittlement is a form of stress corrosion cracking characterized by surface-initiated cracks that occur in piping and equipment exposed to caustic, primarily adjacent to non-PWHT welds. Which of the following materials is the most resistant to embrittlement?A . Carbon steelB . Nickel based alloysC . Low alloy steelsD ....
Sulfidation usually creates:
Sulfidation usually creates:A . Uniform corrosion.B . Isolated pitting.C . Intergranular cracking.D . Transgranular cracking.E . Hard and brittle zones.F . Inspection nightmares.View AnswerAnswer: A
Which of the following materials are susceptible to nitriding?
Which of the following materials are susceptible to nitriding?A . Carbon steelB . 300 Series SSC . 400 Series SSD . All of the aboveView AnswerAnswer: D
MIC is often found in _________, bottom water of storage tanks, piping with stagnant or low flow and piping in contact with some soils.
MIC is often found in _________, bottom water of storage tanks, piping with stagnant or low flow and piping in contact with some soils.A . VesselsB . Heat exchangersC . DrumsD . All of the aboveView AnswerAnswer: B
Caustic embrittlement cracking can be effectively prevented by means of PWHT at a temperature of _______.
Caustic embrittlement cracking can be effectively prevented by means of PWHT at a temperature of _______.A . 1100º FB . 1150º FC . 1200º FD . 1250º FView AnswerAnswer: B
Which of the following alkanolamine systems is the most aggressive in causing amine corrosion?
Which of the following alkanolamine systems is the most aggressive in causing amine corrosion?A . Monoethanolamine (MEA)B . Diglycolamine (DGA)C . Diethanolamine (DEA)D . Methyldiethanolamine (MDEA)View AnswerAnswer: A
________ injection downstream of the desalter is another common method used to reduce the amount of HCl going overhead.
________ injection downstream of the desalter is another common method used to reduce the amount of HCl going overhead.A . HydrogenB . NitrogenC . WaterD . CausticView AnswerAnswer: D
The grain size has an important influence on the high temperature ductility and on the reheat cracking susceptibility. A ________ grain size results in _______ ductile heat affected zones, making the material more susceptible to reheat cracking.
The grain size has an important influence on the high temperature ductility and on the reheat cracking susceptibility. A ________ grain size results in _______ ductile heat affected zones, making the material more susceptible to reheat cracking.A . Large, moreB . Small. LessC . Large, LessD . Small, MoreView AnswerAnswer:...
Refractory anchor material must be compatible with the _________ of the base metal
Refractory anchor material must be compatible with the _________ of the base metalA . CompositionB . WeldingC . Thermal coefficientD . DuctilityView AnswerAnswer: C
With very few exceptions, cooling water should always be on the ________ side to minimize stagnant areas.
With very few exceptions, cooling water should always be on the ________ side to minimize stagnant areas.A . TubeB . ShellC . InletD . OutletView AnswerAnswer: A
