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Where is PASCC normally located?
Where is PASCC normally located?A . Adjacent to weldsB . On impellersC . At stress risersD . At flangesView AnswerAnswer: A
At elevated temperature, the carbide phases in certain carbon steels are unstable and may decompose into _______. This decomposition is known as graphitization.
At elevated temperature, the carbide phases in certain carbon steels are unstable and may decompose into _______. This decomposition is known as graphitization.A . SiliconB . Graphite nodulesC . Carbon dustD . Graphite dustView AnswerAnswer: B
Amine cracking has been reported down to ambient temperatures with some amines. __________ temperatures and stress levels _______ the likelihood and severity of cracking.
Amine cracking has been reported down to ambient temperatures with some amines. __________ temperatures and stress levels _______ the likelihood and severity of cracking.A . Increasing increasesB . Increasing, decreasesC . Decreasing increasesD . Increasing, reducesView AnswerAnswer: A
At high temperatures, metal components can slowly and continuously deform under load below the yield strength. This time dependent deformation of stressed components is known as _______?
At high temperatures, metal components can slowly and continuously deform under load below the yield strength. This time dependent deformation of stressed components is known as _______?A . CreepB . DuctilityC . SofteningD . HardeningView AnswerAnswer: A
High strength steels are susceptible to LME when they come in contact with molten ________.
High strength steels are susceptible to LME when they come in contact with molten ________.A . CadmiumB . ZincC . LeadD . Both A and CView AnswerAnswer: D
Cracks connecting hydrogen blisters are referred to as ________.
Cracks connecting hydrogen blisters are referred to as ________.A . SOHICB . HICC . SCCD . None of the aboveView AnswerAnswer: B
Corrosion in boiler feedwater and condensate return systems is usually the result of dissolved gases, oxygen and ________.
Corrosion in boiler feedwater and condensate return systems is usually the result of dissolved gases, oxygen and ________.A . Carbon monoxideB . Carbon dioxideC . Material propertiesD . H²SView AnswerAnswer: B
Once cracking from LME has occurred, grinding out the affected area ______ an acceptable fix.
Once cracking from LME has occurred, grinding out the affected area ______ an acceptable fix.A . IsB . Is notC . Can beD . Can not beView AnswerAnswer: B
Which of the following are susceptible to thermal fatigue?
Which of the following are susceptible to thermal fatigue?A . SA-516-70B . SA-182 Gr BC . SA-53 Gr BD . All of the aboveView AnswerAnswer: D
A hard, brittle surface layer will develop on some alloys due to exposure to high temperature process streams containing high levels of nitrogen compounds such as ammonia or cyanides, particularly under reducing conditions, is called _______.
A hard, brittle surface layer will develop on some alloys due to exposure to high temperature process streams containing high levels of nitrogen compounds such as ammonia or cyanides, particularly under reducing conditions, is called _______.A . CarburizationB . SpheroidizationC . NitridingD . None of the aboveView AnswerAnswer: C
