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Thermal fatigue cracks usually propagate _______ to the stress and they are usually dagger-shaped.
Thermal fatigue cracks usually propagate _______ to the stress and they are usually dagger-shaped.A . ParallelB . DiagonalC . TransverseD . AcrossView AnswerAnswer: C
Creep damage is found in high temperature equipment operating above the ________. Fired heater tubes and components, Catalytic reactors, FCC reactors and FCC fractionator and regenerator internals all operate in or near this.
Creep damage is found in high temperature equipment operating above the ________. Fired heater tubes and components, Catalytic reactors, FCC reactors and FCC fractionator and regenerator internals all operate in or near this.A . Transition rangeB . MADTC . Creep rangeD . None of the aboveView AnswerAnswer: C
Which of the following alkanolamine systems is the least aggressive in causing amine corrosion?
Which of the following alkanolamine systems is the least aggressive in causing amine corrosion?A . Monoethanolamine (MEA)B . Diglycolamine (DGA)C . Diethanolamine (DEA)D . Methyldiethanolamine (MDEA)View AnswerAnswer: D
Dissimilar weld metal cracking forms at the toe of the weld in the heat affected zone of the ________ material.
Dissimilar weld metal cracking forms at the toe of the weld in the heat affected zone of the ________ material.A . FerriticB . AusteniticC . MartensiticD . Both B and CView AnswerAnswer: A
Corrosion under insulation becomes more severe at metal temperatures between ________ and ________, where water is less likely to vaporize and insulation stays wet longer.
Corrosion under insulation becomes more severe at metal temperatures between ________ and ________, where water is less likely to vaporize and insulation stays wet longer.A . 100º C, 121º CB . 92º C, 116º CC . 114º C, 132º CD . None of the aboveView AnswerAnswer: A
The more noble material, called the ________, is protected by sacrificial corrosion of the more active material, called the ________. The more active metal corrodes at a higher rate than it would if it were not connected to the more noble metal.
The more noble material, called the ________, is protected by sacrificial corrosion of the more active material, called the ________. The more active metal corrodes at a higher rate than it would if it were not connected to the more noble metal.A . Anode, CathodeB . Cathode, AnodeC . Alpha,...
In HF service, carbon steel forms a protective fluoride scale in dry concentrated acid. Loss of the protective scale through high _________ or turbulence will result in greatly accelerated corrosion rates.
In HF service, carbon steel forms a protective fluoride scale in dry concentrated acid. Loss of the protective scale through high _________ or turbulence will result in greatly accelerated corrosion rates.A . TemperatureB . PressureC . VelocitiesD . None of the aboveView AnswerAnswer: C
Which of the following materials is susceptible to CO² corrosion?
Which of the following materials is susceptible to CO² corrosion?A . Carbon steelB . Stainless steelC . Duplex stainless steelD . Both B and CView AnswerAnswer: A
Sulfidation of iron-based alloys usually begins at about:
Sulfidation of iron-based alloys usually begins at about:A . 150 oC . 250 oE . 500 oG . 1100 oView AnswerAnswer: C
In most cases, brittle fracture occurs only at temperatures _________ the Charpy impact transition temperature.
In most cases, brittle fracture occurs only at temperatures _________ the Charpy impact transition temperature.A . AboveB . BelowC . AroundD . InsideView AnswerAnswer: B
