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With creep, increased stress due to loss in thickness from corrosion will ________ time to failure.
With creep, increased stress due to loss in thickness from corrosion will ________ time to failure.A . IncreaseB . ReduceC . Not affectD . None of the aboveView AnswerAnswer: B
With hydrofluoric acid corrosion, corrosion rates increase with _______ temperatures and ______ HF concentrations.
With hydrofluoric acid corrosion, corrosion rates increase with _______ temperatures and ______ HF concentrations.A . Increasing, decreasingB . Decreasing, increasingC . Increasing, increasingD . Decreasing, decreasingView AnswerAnswer: A
To prevent hydrogen embrittlement, use lower strength steels and _________ to temper the microstructure, improve ductility and reduce residual stresses.
To prevent hydrogen embrittlement, use lower strength steels and _________ to temper the microstructure, improve ductility and reduce residual stresses.A . AlloysB . PreheatC . PWHTD . All of the aboveView AnswerAnswer: C
The level of creep damage is a function of the material and the coincident _________ level at which the creep deformation occurs.
The level of creep damage is a function of the material and the coincident _________ level at which the creep deformation occurs.A . Pressure/TemperatureB . Pressure/StressC . Temperature/StressD . None of the aboveView AnswerAnswer: C
A form of corrosion that can occur at the junction of dissimilar metals when they are joined together in a suitable electrolyte is __________.
A form of corrosion that can occur at the junction of dissimilar metals when they are joined together in a suitable electrolyte is __________.A . Galvanic corrosionB . Anodic corrosionC . Cathodic corrosionD . All of the aboveView AnswerAnswer: A
The primary factors affecting high temperature oxidation are metal temperature and _______.
The primary factors affecting high temperature oxidation are metal temperature and _______.A . PressureB . Alloy compositionC . StressD . OxygenView AnswerAnswer: B
Sulfuric acid promotes general and localized corrosion of carbon steel. Carbon steel heat affected zones may experience severe corrosion. Acid concentration, temperature, alloy content and ____________ are critical factors affecting sulfuric acid corrosion.
Sulfuric acid promotes general and localized corrosion of carbon steel. Carbon steel heat affected zones may experience severe corrosion. Acid concentration, temperature, alloy content and ____________ are critical factors affecting sulfuric acid corrosion.A . PressureB . StressC . VelocityD . DuctilityView AnswerAnswer: C
Which of the following materials is affected by high temperature corrosion?
Which of the following materials is affected by high temperature corrosion?A . Carbon steelB . 300 Series SSC . 400 Series SSD . All of the aboveView AnswerAnswer: D
Many thermal fatigue cracks are filled with:
Many thermal fatigue cracks are filled with:A . chlorides.B . hydroslime.C . oxides.D . sulfides.View AnswerAnswer: C
Ammonium chloride corrosion is the general or localized corrosion, often pitting, normally occurring under ammonium chloride or amine salt deposits. All commonly used materials are susceptible to ammonium chloride corrosion. A small amount of _________ can lead to very aggressive corrosion.
Ammonium chloride corrosion is the general or localized corrosion, often pitting, normally occurring under ammonium chloride or amine salt deposits. All commonly used materials are susceptible to ammonium chloride corrosion. A small amount of _________ can lead to very aggressive corrosion.A . Ammonium chlorideB . AmineC . WaterD . SaltView...
