Exam (elaborations)
ABYC CORROSION QUESTIONS AND ANSWERS
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ABYC CORROSION QUESTIONS AND ANSWERS
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__________ are electrical conductors in which current is carried by ions rather than by free
electrons.
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Electrolytes
,If a magnesium sacrificial anode only has a 50% efficiency rating, where does the
other 50% go?
a. It goes to self-destruction by simple electrochemical corrosion
b. It evaporates into the water
c. It melts
d. It plates out on the propeller
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A. Self destruction
Electrochemical cells have electron flow from:
a. Cathode to anode
b. Anode to cathode
c. Cathode to solution
d. Anode to solution
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B: Anode to cathode
If you have a single piece of metal that is corroding, the process is:
a. Stray current
b. Galvanic
c. Simple Electrochemical
d. Other - not listed
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, C. Simple Electrochemical
We have been referencing the galvanic series. Which of the following best describes
it use?
a. Inform us of the potential for interaction between metals
b. Predict corrosion rates of metals
c. Inform us what type of fastener to select
d. Predict what type of electrolyte is needed
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A. Inform us of the potential for interaction between metals.
The three categories of corrosion are:
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Electrochemical, galvanic, and electrolytic
Technician A says that sterndrives are protected exclusively by impressed current
systems. Technician B says that sterndrives commonly use sacrificial anodes in
addition to impressed current protection. Which technician is correct?
a. Technician A
b. Technician B
c. Both technicians
d. Neither technician
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, B. Tech B.
Which of the following is NOT a type of flow and velocity corrosion?
a. Impingement corrosion
b. Cavitation corrosion
c. Erosion corrosion
d. Crevice corrosion
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D. Crevice corrosion
Molecules are made of
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Atoms
Localized hull coatings around impressed current anodes are not used to
a. Protect the hull against chlorine gas
b. Prevent current reentry
c. Prevent hull damage in the immediate area of the anode
d. Provide cosmetic faring of the anode
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D. Provide cosmetic faring of the anode.
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