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Higher __________ containing alloys are used for improved resistance to naphthenic acid corrosion.
Higher __________ containing alloys are used for improved resistance to naphthenic acid corrosion.A . ChromiumB . CarbonC . MolybdenumD . All of the aboveView AnswerAnswer: C
What is the chemical symbol for butane of butylenes?
What is the chemical symbol for butane of butylenes?A . C²B . C3C . C4D . CH4View AnswerAnswer: C
When carbon is absorbed into a material at elevated temperatures while in contact with a carbonaceous substance it is called carburization. Temperatures usually have to be above __________ for this to occur.
When carbon is absorbed into a material at elevated temperatures while in contact with a carbonaceous substance it is called carburization. Temperatures usually have to be above __________ for this to occur.A . 1000º FB . 1100º FC . 1200º FD . 1400º FView AnswerAnswer: B
Preventative measures to minimize the potential for brittle fracture in existing equipment are limited to controlling _______ and ________, minimizing pressure at ambient temperatures during start-up and shutdown and periodic inspections at high stress locations.
Preventative measures to minimize the potential for brittle fracture in existing equipment are limited to controlling _______ and ________, minimizing pressure at ambient temperatures during start-up and shutdown and periodic inspections at high stress locations.A . Temperature, stressB . Stress, pressureC . Velocity, stressD . Temperature, PressureView AnswerAnswer: D
In most cases, brittle fracture occurs only at temperatures below the Charpy impact transition temperature. Steel cleanliness and ________ have a significant influence on toughness and resistance to brittle fracture.
In most cases, brittle fracture occurs only at temperatures below the Charpy impact transition temperature. Steel cleanliness and ________ have a significant influence on toughness and resistance to brittle fracture.A . Alloy compositionB . Tensile strengthC . Grain sizeD . PressureView AnswerAnswer: C
Cracks that are typically straight, non-branching, and devoid of any associated plastic deformation are likely associated with which type of failure?
Cracks that are typically straight, non-branching, and devoid of any associated plastic deformation are likely associated with which type of failure?A . Stress corrosion crackingB . Brittle fractureC . Thermal fatigueD . Temper embrittlementView AnswerAnswer: B
Soils having high moisture content, high dissolved salt concentrations and high ________ are the most corrosive.
Soils having high moisture content, high dissolved salt concentrations and high ________ are the most corrosive.A . Oxygen contentB . ResistivityC . AcidityD . All of the aboveView AnswerAnswer: C
Phosphoric acid corrosion is usually found in ________ areas.
Phosphoric acid corrosion is usually found in ________ areas.A . High velocityB . Low velocityC . High temperatureD . Low temperatureView AnswerAnswer: B
______ is most likely found in hard welds and heat affected zones and in high strength components.
______ is most likely found in hard welds and heat affected zones and in high strength components.A . SOHICB . HICC . CarburizationD . SSCView AnswerAnswer: D
The presence of ________ in H²S streams increases the severity of high temperature sulfide corrosion at temperatures above about 500º F
The presence of ________ in H²S streams increases the severity of high temperature sulfide corrosion at temperatures above about 500º FA . AmineB . HydrogenC . SulfidesD . All of the aboveView AnswerAnswer: B
