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Thermal fatigue damage is in the form of cracking that may occur anywhere in a metallic component where relative movement is constrained, particularly under repeated __________.
Thermal fatigue damage is in the form of cracking that may occur anywhere in a metallic component where relative movement is constrained, particularly under repeated __________.A . Cyclic stressesB . Thermal cyclingC . Pressure variationsD . All of the aboveView AnswerAnswer: B
A brittle fracture:
A brittle fracture:A . Is caused by stress cycles.B . Is always the result of thermal stresses.C . Grow very rapidly with minimum deformation prior to failure.D . Grows slowly and is dependent on time and stress.View AnswerAnswer: C
Susceptibility to temper embrittlement is largely determined by the presence of the alloying elements manganese and _______.
Susceptibility to temper embrittlement is largely determined by the presence of the alloying elements manganese and _______.A . ChromiumB . MolyC . SiliconD . None of the aboveView AnswerAnswer: C
Creep and stress rupture is more likely in a _________ grained material than a _______ grained material.
Creep and stress rupture is more likely in a _________ grained material than a _______ grained material.A . Course, FineB . Fine, CourseC . Austenetic, MartensiticD . None of the aboveView AnswerAnswer: A
When connected to a more anodic material, titanium may suffer severe __________.
When connected to a more anodic material, titanium may suffer severe __________.A . CorrosionB . HydridingC . StressD . Notch toughnessView AnswerAnswer: B
Blistering, HIC and SOHIC have been found to occur between ambient and ________.
Blistering, HIC and SOHIC have been found to occur between ambient and ________.A . 250º FB . 300º FC . 350º FD . 400º FView AnswerAnswer: B
Components that have been carburized may have a change in the level of ________.
Components that have been carburized may have a change in the level of ________.A . CarbonB . ChromiumC . FerromagnetismD . StressView AnswerAnswer: C
Which material does not have an endurance limit?
Which material does not have an endurance limit?A . Non-normalized carbon steelB . Normalized carbon steelC . Stainless steelD . TitaniumView AnswerAnswer: C
For carbon steel, common velocity limits are generally limited to _________ fps for rich amine and _______ fps for lean amine.
For carbon steel, common velocity limits are generally limited to _________ fps for rich amine and _______ fps for lean amine.A . 8-10, 30B . 6-9, 15C . 4-8, 10D . 3-6, 20View AnswerAnswer: D
____________ is the reduction in toughness due to a metallurgical change that can occur in some low alloy steels as a result of long-term exposure in the temperature range of about 650º F to 1100º F.
____________ is the reduction in toughness due to a metallurgical change that can occur in some low alloy steels as a result of long-term exposure in the temperature range of about 650º F to 1100º F.A . HardeningB . GraphitizationC . SpheroidizationD . Temper embrittlementView AnswerAnswer: D
