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Hydrogen blisters may form as surface bulges on the ID, the OD on within the wall thickness of a pipe or pressure vessel. Blistering occurs from hydrogen generated by ______, not hydrogen gas from the process stream.
Hydrogen blisters may form as surface bulges on the ID, the OD on within the wall thickness of a pipe or pressure vessel. Blistering occurs from hydrogen generated by ______, not hydrogen gas from the process stream.A . H²SB . CorrosionC . HydridingD . SulfurView AnswerAnswer: B
300 Series SS can be used for sour water service at temperatures below ____________, where Chloride SCC is not likely.
300 Series SS can be used for sour water service at temperatures below ____________, where Chloride SCC is not likely.A . 120º FB . 140º FC . 150º FD . 175º FView AnswerAnswer: B
At elevated temperatures, dissimilar weld metal cracking is aggravated by the diffusion of carbon out of the weld metal and into the base metal. The temperature at which carbon diffusion becomes a concern is above ________.
At elevated temperatures, dissimilar weld metal cracking is aggravated by the diffusion of carbon out of the weld metal and into the base metal. The temperature at which carbon diffusion becomes a concern is above ________.A . 700º FB . 750º FC . 800º FD . 900º FView AnswerAnswer: C
Naphthenic acid is _____ by catalytic reactions in downstream hydro processing and FCC units.
Naphthenic acid is _____ by catalytic reactions in downstream hydro processing and FCC units.A . EnhancedB . DestroyedC . ConcentratedD . DilutedView AnswerAnswer: B
Decarburization results in a __________, which can be confirmed by hardness testing.
Decarburization results in a __________, which can be confirmed by hardness testing.A . HardnessB . SoftnessC . BrittlenessD . OxidizingView AnswerAnswer: B
________ eliminates the susceptibility of most common steels to SCC.
________ eliminates the susceptibility of most common steels to SCC.A . PreheatB . High temperatureC . PWHTD . All of the aboveView AnswerAnswer: C
With high temperature sulfide corrosion (Sulfidization), noticeable increases may be found downstream of _________ injection points.
With high temperature sulfide corrosion (Sulfidization), noticeable increases may be found downstream of _________ injection points.A . HydrogenB . CausticC . AmmoniaD . WaterView AnswerAnswer: A
Which of the following metals is the most anodic?
Which of the following metals is the most anodic?A . ZincB . Carbon SteelC . NickelD . MonelView AnswerAnswer: A
The most important factors affecting graphitization are the chemistry, stress, temperature and _______.
The most important factors affecting graphitization are the chemistry, stress, temperature and _______.A . VelocityB . Time at exposureC . PressureD . DuctilityView AnswerAnswer: B
Cooling water corrosion is a concern with water-cooled __________ and cooling towers in all applications across all industries.
Cooling water corrosion is a concern with water-cooled __________ and cooling towers in all applications across all industries.A . PumpsB . VesselsC . PipingD . ExchangersView AnswerAnswer: D
