API-571 Exam Question 76
_________ is surface initiated cracks caused by environmental cracking of 300 Series SS and some nickel based alloys under the combined action of tensile stress, temperature and an aqueous chloride environment. The presence of dissolved oxygen increases the propensity for cracking.
API-571 Exam Question 77
A form of mechanical fatigue in which cracks are produced as a result of dynamic loadings is _______.
API-571 Exam Question 78
The presence of _________ can destabilize the scale and turn it into a nonprotective scale.
API-571 Exam Question 79
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.
API-571 Exam Question 80
Carbonate stress corrosion cracking usually occurs at welds or cold worked areas that __________.
