What method is most used to assure boiler feed water corrosion is not occurring?
A. Spot UT readings at turbulent areas
B. Profile RT at turbulent areas
C. Profile RT at stagnant areas
D. Laboratory analysis of boiler feedwater
D
What treatment is used to prevent boiler feed water corrosion?
B
Protection in a boiler from boiler feed water corrosion is accomplished by:
D
Corrosion from oxygen in boiler feed water usually creates:
B
Which of the following is not a major factor associated with boiler water condensate corrosion?
A
Sulfidation usually creates:
A
Sulfidation is primarily caused by:
B
Resistance to sulfidation increases as the:
A
Sulfidation of iron-based alloys usually begins at about:
C
Which of the following is not a major factor associated with corrosion by sulfidation?
A. Alloy composition
B. Operating pressure
C. Operating temperature
D. Sulfur content
B
Mechanical fatigue can cause cracks that initiate from the surface and often form a:
A
Inspecting for high-cycle fatigue can be difficult since:
C
The endurance limit is usually about:
B
Which material does not have an endurance limit?
A. Non-normalized carbon steel
B. Normalized carbon steel
C. Stainless steel
D. Titanium
C
Fatigue will not occur in carbon steel if stresses are below the:
B