The questions for this exam were last updated on January 7, 2026
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___________ cracking has been a major problem in coke drum shells.
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Question No. 2
Many thermal fatigue cracks are filled with:
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Question No. 3
Which of the following are affected by sulfidation?
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Question No. 4
A form of corrosion that can occur at the junction of dissimilar metals when they are joined together in a suitable electrolyte is __________.
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Question No. 5
Fatigue cracks usually initiate on the surface at notches or __________ under cyclic loading.
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Question No. 6
Sulfide stress cracking (SSC) is defined as cracking of metal under the combined action of tensile stress and corrosion in the presence of _________ and _________.
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Question No. 7
A 6”, A106 Gr B, flanged line carrying caustic wash water at 200º F has signs of atmospheric corrosion. Which of the following may have help accelerate the corrosion?
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Question No. 8
The most common method used for monitoring underground structures is measuring the structure to soil ______ using dedicated reference electrodes near the structure.
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Question No. 9
Mitigation of CUI is best achieved by _________.
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Question No. 10
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.
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Question No. 11
__________ testing is the best method to determine the susceptibility of a material to hydrogen stress cracking.
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Question No. 12
________ injection downstream of the desalter is another common method used to reduce the amount of HCl going overhead.
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Question No. 13
Hydriding of titanium is a metallurgical phenomenon in which hydrogen diffuses into the titanium and reacts to form an embrittling phase. This can result in a complete loss of _________ with no noticeable sign of corrosion or loss of thickness.
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Question No. 14
SSC generally occurs below about ________.
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Question No. 15
Which of these cast irons are not susceptible to graphitic corrosion?