Corrosion of the anode may be significantly higher ________ to the connection to the cathode, depending on solution conductivity.
A. Parallel
B. Adjacent
C. Diagonally
D. Perpendicular
Proper application of ________ will control but not eliminate microbes that cause MIC so that continued treatment is necessary.
A. Ozone
B. Caustic
C. Biocides
D. None of the above
For pressure vessels, inspection should focus on welds of ________ operating in the creep range.
A. CrMo alloys
B. Carbon steel
C. Stainless steel D. Low hydrogen electrodes
Which of the following is not a primary factor contributing to erosion-corrosion?
A. Impact angle (angle that impacting particles strike metal)
B. Tensile strength of the metal
C. Velocity of impacting particles
D. Corrosiveness of the environment
_________ significantly increases the probability and severity of blistering, HIC and SOHIC.
A. Hydrogen
B. Oxygen
C. Cyanide
D. Caustic
The signature mark of a fatigue failure is a _______ type fingerprint that has concentric rings.
A. Eyebrow
B. Half-Moon
C. Radii
D. Clam Shell
__________ is a change in the microstructure of certain carbon steels and 0.5 Mo steels after long term operation in the 800º F to 1100º F range.
A. Graphitization
B. Softening
C. Temper Embrittlement
D. Creep
Which of these materials exhibit an endurance limit below which fatigue cracking will not occur?
A. Carbon steel
B. 300 Series SS
C. 400 Series SS
D. None of the above
_________ is the sudden rapid fracture under stress (residual or applied) where the material exhibits little or no evidence of ductility or plastic deformation.
A. Thermal fatigue
B. Thermal shock
C. Brittle fracture
D. Stress fracture
Cracks connecting hydrogen blisters are referred to as ________.
A. SOHIC
B. HIC
C. SCC
D. None of the above
