Which of the following can be affected by 885º F Embrittlement?
A. 410 SS
B. 430 SS
C. 308 SS
D. Alloy 2205
E. A, B and D
Weld heat affected zone graphitization is most frequently found in the heataffected zone adjacent to welds in a narrow band, corresponding to the low temperature edge of the heat affected zone, In multi-pass welded butt joints, these zones overlap each other covering the entire cross section. Because of its appearance, this type of graphitization is called________.
A. Half-moon
B. Eyebrow
C. Radii
D. None of the above
In order for PASCC to occur the material must be ______.
A. PWHT
B. Non-PWHT
C. Sensitized
D. Austenetic
In a pump, the difference between the actual pressure, or head, of a liquid available (measured on the suction side) and the vapor pressure of that liquid is called Net Positive Suction Head (NPSH) available. The minimum head required to
prevent cavitation with a given liquid at a given flow rate is called Net Positive Suction Head __________.
Inadequate NPSH can result in cavitation.
A. Surplus
B. Required
C. Reserve
D. None of the above
Spheroidization and graphitization are competing mechanisms that occur at overlapping temperature ranges. Spheroidization tends to occur preferentially above _______ while graphitization predominates below this temperature.
A. 1000º F
B. 1025º F
C. 1050º F
D. 1100º F
Carbonate SCC may easily be mistaken for SSC or SOHIC; however, the carbonate cracks are usually ________ the toe of the weld and have multiple parallel cracks.
A. Further from
B. Closer to
C. Diagonal to
D. Perpendicular to
Hardness levels above ________ are highly susceptible to hydrogen stress cracking (HF).Time-to-failure decreases as the hardness increases.
A. 225 BHN
B. 237 BHN
C. 241 BHN
D. 247 BHN
Which material below is not susceptible to caustic corrosion?
A. Carbon steel
B. 400 Series SS
C. 300 Series SS
D. Low alloy steel
The best method to inspect for SCC is ____.
A. WFMT
B. UT Shear wave
C. AET
D. All of the above
Corrosion by HF (Hydrofluoric) acid can result in high rates of general or localized corrosion and may be accompanied by hydrogen cracking, blistering and ________.
A. HIC
B. Delayed cracking
C. SOHIC
D. Both A and C
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