API-571 Exam Study Guide Free Practice Test LAST UPDATED DATE Jan 03, 2026 [Q43-Q66]

NEW QUESTION 43
Carbonate stress corrosion cracking and alkaline stress corrosion cracking are:

NEW QUESTION 44
Which of the following materials are subject to mechanical fatigue?

NEW QUESTION 45
Cracking of dissimilar weld metals occurs in the __________ side of a weld joining 300 Series SS and carbon steel.

NEW QUESTION 46
Short term overheating is a permanent deformation occurring at relatively _________ stress levels as a result of localized overheating. This usually results in bulging and failure by stress rupture.

NEW QUESTION 47
Time to failure by thermal fatigue is primarily affected by:

NEW QUESTION 48
Low creep ductility is __________ severe in high tensile strength materials and welds.

NEW QUESTION 49
Primarily hot-wall piping and equipment in the following units can be affected by graphitization. FCC, catalytic reformer and ______.

NEW QUESTION 50
The extent and depth of decarburization is a function of temperature and ______.

NEW QUESTION 51
Which of these materials are not susceptible to PASCC?

NEW QUESTION 52
Which of these cast irons are not susceptible to graphitic corrosion?

NEW QUESTION 53
Refractory anchor material must be compatible with the _________ of the base metal

NEW QUESTION 54
Cooling water corrosion and __________ are closely related and should be considered together.

NEW QUESTION 55
Corrosion from oxygen in boiler feed water usually creates:

NEW QUESTION 56
Low creep ductility is __________ severe in high tensile strength materials and welds.

NEW QUESTION 57
Since all fuels contain some amount of sulfur, sulfuric and sulfurous acid __________ can occur if the metal temperature is below this temperature.

NEW QUESTION 58
General or localized corrosion of carbon steels and other metals caused by dissolved salts, gases, organic compounds or microbiological activities is called ________.

NEW QUESTION 59
Nitriding of steels becomes most severe at temperatures above:

NEW QUESTION 60
Welds joining dissimilar materials (ferritic and austenetic) may suffer __________ related damage at high temperatures due to differential thermal expansion stresses.

NEW QUESTION 61
MIC is often characterized by _______ within pits in carbon steel.

NEW QUESTION 62
Localized corrosion due to the concentration of caustic or alkaline salts that usually occurs under evaporative conditions is _________.

NEW QUESTION 63
With CUI, corrosion rates __________ with increasing metal temperatures up to the point where the water evaporates quickly.

NEW QUESTION 64
A form of fatigue cracking in which cracks develop under the combined effects of cyclic loading and corrosion is called _______. Cracking often initiates at stress concentrations such as a pit in the surface.

NEW QUESTION 65
With steam blanketing, failure occurs as a result of _________ in the tube from the internal steam pressure at the elevated temperature.

NEW QUESTION 66
Steel hardness and strength are critical factors for what type of damage mechanism?