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Titanium Hydriding damage occurs primarily in sour water strippers and amine units in the overhead condensers, heat exchanger tubes and other titanium equipment operating above _________.
Titanium Hydriding damage occurs primarily in sour water strippers and amine units in the overhead condensers, heat exchanger tubes and other titanium equipment operating above _________.A . 300º FB . 270º FC . 210º FD . 165º FView AnswerAnswer: D
300 series stainless steel heater tubes in an oil-burning furnace in the hydrocracker began to leak and the furnace was brought down. What was the probable cause of the cracking?
300 series stainless steel heater tubes in an oil-burning furnace in the hydrocracker began to leak and the furnace was brought down. What was the probable cause of the cracking?A . Chloride stress corrosionB . Polythionic acid stress corrosionC . Amine stress corrosionD . Stress oriented hydrogen induced crackingView AnswerAnswer:...
General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activity is called _______.
General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activity is called _______.A . Cooling water corrosionB . OxidationC . MICD . None of the aboveView AnswerAnswer: A
_________ significantly increases the probability and severity of blistering, HIC and SOHIC.
_________ significantly increases the probability and severity of blistering, HIC and SOHIC.A . HydrogenB . OxygenC . CyanideD . CausticView AnswerAnswer: C
With steam blanketing, failure occurs as a result of _________ in the tube from the internal steam pressure at the elevated temperature.
With steam blanketing, failure occurs as a result of _________ in the tube from the internal steam pressure at the elevated temperature.A . Stress risersB . VelocityC . Hoop stressD . Tensile strengthView AnswerAnswer: C
Carbon dioxide corrosion results when CO² dissolves in water to form _________ acid.
Carbon dioxide corrosion results when CO² dissolves in water to form _________ acid.A . SulfuricB . HydrochloricC . CarbonicD . None of the aboveView AnswerAnswer: C
Protection in a boiler from boiler feed water corrosion is accomplished by:
Protection in a boiler from boiler feed water corrosion is accomplished by:A . Injecting chlorines to kill microbiological bugs.B . Injecting caustic to lower the ph to < 4.0.C . Lowering solids content in boiler feed water to less than 50 ppm.D . Maintaining a protective corrosion layer of magnetite...
Susceptibility to hydrogen stress cracking __________ with __________ hardness.
Susceptibility to hydrogen stress cracking __________ with __________ hardness.A . Increases, increasingB . Decreases, increasingC . Decreases, DecreasingD . Both A and CView AnswerAnswer: D
With sour water corrosion, corrosion increases with __________ NH4HS concentration and __________ velocity.
With sour water corrosion, corrosion increases with __________ NH4HS concentration and __________ velocity.A . Increasing, DecreasingB . Increasing, IncreasingC . Decreasing, DecreasingD . Decreasing, IncreasingView AnswerAnswer: B
_________ is the main concern during start-up, shutdown and/or hydro testing for equipment/piping operating at elevated temperatures. This event can also occur in an auto refrigeration event in units processing light hydrocarbons.
_________ is the main concern during start-up, shutdown and/or hydro testing for equipment/piping operating at elevated temperatures. This event can also occur in an auto refrigeration event in units processing light hydrocarbons.A . Stress fractureB . CarburizationC . SpheroidizationD . Brittle fractureView AnswerAnswer: D
