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The extent and depth of decarburization is a function of temperature and ______.
The extent and depth of decarburization is a function of temperature and ______.A . PressureB . Material propertiesC . Exposure timeD . VelocityView AnswerAnswer: C
Susceptibility to sulfidation is determined by the _________ of the material.
Susceptibility to sulfidation is determined by the _________ of the material.A . Corrosion resistanceB . Tensile strengthC . Chemical compositionD . Yield strengthView AnswerAnswer: C
Major factors affecting sulfidation are alloy composition, temperature and ________.
Major factors affecting sulfidation are alloy composition, temperature and ________.A . TimeB . StressC . Concentration of hydrogenD . Concentration of sulfurView AnswerAnswer: D
Amine stress corrosion cracking is most often associated with lean amine services. The pure alkanolamine does not cause cracking. Cracking in rich amine services are most often associated with _______ problems.
Amine stress corrosion cracking is most often associated with lean amine services. The pure alkanolamine does not cause cracking. Cracking in rich amine services are most often associated with _______ problems.A . H²SB . StressC . Wet H²SD . TemperatureView AnswerAnswer: C
Units where graphitization may be suspected are the FCCU and the _____ unit.
Units where graphitization may be suspected are the FCCU and the _____ unit.A . HydrotreaterB . CokerC . AlkyD . None of the aboveView AnswerAnswer: B
Most brittle failures occur:
Most brittle failures occur:A . Below the impact transition temperature.B . On thinner materials.C . On “clean” steel.D . While in operation at elevated temperatures.View AnswerAnswer: A
SCC tendency ________ towards the alkaline pH region
SCC tendency ________ towards the alkaline pH regionA . DecreasesB . IncreasesC . Remains constantD . VariesView AnswerAnswer: A
Which of the following is not a major factor associated with corrosion by sulfidation?
Which of the following is not a major factor associated with corrosion by sulfidation?A . Alloy compositionB . Operating pressureC . Operating temperatureD . Sulfur contentView AnswerAnswer: B
Atmospheric corrosion:
Atmospheric corrosion:A . Can cause either uniform or localized wall loss.B . Always causes localized wall loss.C . Always causes uniform wall loss.D . Is best detected using profile RView AnswerAnswer: A
__________ is a form of damage found mostly in older vintage carbon steels and C-0.5 Mo low alloy steels under the combined effects of deformation and aging at an intermediate temperature.
__________ is a form of damage found mostly in older vintage carbon steels and C-0.5 Mo low alloy steels under the combined effects of deformation and aging at an intermediate temperature.A . SpheroidizationB . Thermal fatigueC . Strain agingD . None of the aboveView AnswerAnswer: C
