ABYC CORROSION EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ 2025 – 2026
You have a boat with a home port in a fresh water river that often travels for
extended periods into the ocean. What type of sacrificial anode would you
recommend?
a. Aluminum
b. Zinc
c. Magnesium
d. Any of these will work, if sized properly - ANSWERS-A. Aluminum (E-2.7
Note 4)
A galvanic isolator allows AC current to pass through?
a. True
b. False
c. Cannot be determined, need more information - ANSWERS-A. True
The extent of galvanic corrosion depends on:
a. Voltage difference, how far apart on scale
b. Relative area of the two metals
,c. The environment in which they are immersed
d. All of these are true - ANSWERS-D. All of these
Atoms become more stable by sharing electrons. This is called ______
bonding.
a. Polar
b. Covalent
c. Ionic
d. Electrostatics - ANSWERS-B. Covelant
Whenever possible we want to maintain a favorable cathode-to-anode ratio.
This ratio should be:
a. Low
b. High
c. Neutral
d. Equal - ANSWERS-A. Low*
*This is a shitty question. Be sure to consider the wording carefully:
"Cathode-to-anode".
We want less cathode and more anode to protect it. A "low ratio" of cathode
to anode.
Read more: Collier Ch 6, pg 36.
Sacrificial anodes will not prevent electrolytic corrosion
, a. True
b. False
c. Cannot be determined, need more information - ANSWERS-A. True
Electrolytic corrosion is commonly known as: - ANSWERS-Stray-current
corrosion
Stray-current corrosion is technically called: - ANSWERS-Electrolytic corrosion
Matter can exist as a - ANSWERS-Solid, liquid, or gas
Matter is made from - ANSWERS-Molecules
Molecules are made of - ANSWERS-Atoms
Atoms are made of - ANSWERS-protons, neutrons, electrons
The atom is electrically - ANSWERS-Neutral. That's because the particles that
comprise an atom balance each other.
the outer shell of an atom is called the - ANSWERS-Valence shell
When the valence shell of an atom is completely filled, the atom is in its most
______ state. - ANSWERS-Stable.
Atoms that have gained or lost an electron are known as - ANSWERS-Ions
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ 2025 – 2026
You have a boat with a home port in a fresh water river that often travels for
extended periods into the ocean. What type of sacrificial anode would you
recommend?
a. Aluminum
b. Zinc
c. Magnesium
d. Any of these will work, if sized properly - ANSWERS-A. Aluminum (E-2.7
Note 4)
A galvanic isolator allows AC current to pass through?
a. True
b. False
c. Cannot be determined, need more information - ANSWERS-A. True
The extent of galvanic corrosion depends on:
a. Voltage difference, how far apart on scale
b. Relative area of the two metals
,c. The environment in which they are immersed
d. All of these are true - ANSWERS-D. All of these
Atoms become more stable by sharing electrons. This is called ______
bonding.
a. Polar
b. Covalent
c. Ionic
d. Electrostatics - ANSWERS-B. Covelant
Whenever possible we want to maintain a favorable cathode-to-anode ratio.
This ratio should be:
a. Low
b. High
c. Neutral
d. Equal - ANSWERS-A. Low*
*This is a shitty question. Be sure to consider the wording carefully:
"Cathode-to-anode".
We want less cathode and more anode to protect it. A "low ratio" of cathode
to anode.
Read more: Collier Ch 6, pg 36.
Sacrificial anodes will not prevent electrolytic corrosion
, a. True
b. False
c. Cannot be determined, need more information - ANSWERS-A. True
Electrolytic corrosion is commonly known as: - ANSWERS-Stray-current
corrosion
Stray-current corrosion is technically called: - ANSWERS-Electrolytic corrosion
Matter can exist as a - ANSWERS-Solid, liquid, or gas
Matter is made from - ANSWERS-Molecules
Molecules are made of - ANSWERS-Atoms
Atoms are made of - ANSWERS-protons, neutrons, electrons
The atom is electrically - ANSWERS-Neutral. That's because the particles that
comprise an atom balance each other.
the outer shell of an atom is called the - ANSWERS-Valence shell
When the valence shell of an atom is completely filled, the atom is in its most
______ state. - ANSWERS-Stable.
Atoms that have gained or lost an electron are known as - ANSWERS-Ions
