NACE CP2 – ESSENTIAL QUESTIONS
WITH VERIFIED SOLUTIONS 2025\2026 A+
Grade
Corrosion is an electrochemical process involving
A) flow of protons and electrons
B) flow of neutrons and ions
C) flow of protons and ions
D) flow of electrons and ions
E) flow of resistance and resistivity
- accurate answers-d
Metal loss or corrosion occurs at the
A) cathode
B) anode
C) electronic path
D) metallic path
- accurate answers-b
What are the four parts of the corrosion cell
A) anode, resistor, electrolyte, metallic path
B) anode, cathode, electron, electronic path
C) anode, cathode, electrolyte, metallic path
- accurate answers-c
True or False (t or f):
Ions exist only in the electrolyte?
- accurate answers-t
Electrons flow in a corrosion cell by which of the following paths?
A) anode to cathode via electrolyte
B) cathode to anode via electronic path
,C) anode to cathode via electronic path
- accurate answers-c
At the cathodic surface in a corrosion cell, the electrons from the ____ meet ____
ions from the solution.
A) cathode, hydrogen
B) cathode, OH-
C) anode, hydrogen
D) anode, OH-
- accurate answers-c
Oxidation of the metal occurs at the ____
surfaces and reduction of ____ ions occurs at the ____.
A) anodic, hydrogen, cathodes
B) cathode, OH-, anodic
C) anodic, OH-, cathodes
D) cathode, anodic, electrolyte
E) cathode, hydrogen, electrolyte
- accurate answers-a
True or false
Is oxidation necessarily associated with oxygen?
- accurate answers-f
Current flow in a corrosion cell flows which path:
A) anode to metallic path to cathode
B) anode to electronic path to cathode
C) cathode to metallic to anode
D) cathode to electrolyte to anode
E) anode to electrolyte to cathode
Voltage is the measure of the electrochemical difference between two
electrodes
,in an electrolyte
- accurate answers-e
_____ is the measure of the electrochemical difference between two electrodes
in an electrolyte
A) current
B) resistance
C) error
D) ohms
E) ohms-cm
F) voltage
- accurate answers-f
The ________
represents the reversible work to move a unit charge from the electrode
surface
through the solution to the reference electrode
A) current potential
B) electrode potential
C) resistance potential
D) ohms potential
E) Faraday potential
- accurate answers-b
Metals occur in nature in the form of various chemical compounds referred to
as
___
A) ores
B) anodic metals
C) cathodic metals
D) carbohydrates
- accurate answers-a
The amount of energy required by a metal during the refining
process determines the ___ or _______ of the metal.
, A) current, active state
B) voltage, active state
C) active resistance, voltage
D) resistance, active state
E) current, active resistance
- accurate answers-b
During the refining stage of metal the ____ the energy, the more ____
the metal and the more tendency it has to corrode.
A) higher, inactive
B) lower, active
C) higher, active
D) lower, inactive
- accurate answers-c
What is the most common iron ore?
A) hemophite
B) hematite
C) magnesium
D) calcium
E) aluminum
- accurate answers-b
True or false
Iron is considered thermodynamically unstable?
- accurate answers-t
True or false
Gold is more noble than zinc?
- accurate answers-t
Which of the following metals is most active?
A) magnesium
B) copper
WITH VERIFIED SOLUTIONS 2025\2026 A+
Grade
Corrosion is an electrochemical process involving
A) flow of protons and electrons
B) flow of neutrons and ions
C) flow of protons and ions
D) flow of electrons and ions
E) flow of resistance and resistivity
- accurate answers-d
Metal loss or corrosion occurs at the
A) cathode
B) anode
C) electronic path
D) metallic path
- accurate answers-b
What are the four parts of the corrosion cell
A) anode, resistor, electrolyte, metallic path
B) anode, cathode, electron, electronic path
C) anode, cathode, electrolyte, metallic path
- accurate answers-c
True or False (t or f):
Ions exist only in the electrolyte?
- accurate answers-t
Electrons flow in a corrosion cell by which of the following paths?
A) anode to cathode via electrolyte
B) cathode to anode via electronic path
,C) anode to cathode via electronic path
- accurate answers-c
At the cathodic surface in a corrosion cell, the electrons from the ____ meet ____
ions from the solution.
A) cathode, hydrogen
B) cathode, OH-
C) anode, hydrogen
D) anode, OH-
- accurate answers-c
Oxidation of the metal occurs at the ____
surfaces and reduction of ____ ions occurs at the ____.
A) anodic, hydrogen, cathodes
B) cathode, OH-, anodic
C) anodic, OH-, cathodes
D) cathode, anodic, electrolyte
E) cathode, hydrogen, electrolyte
- accurate answers-a
True or false
Is oxidation necessarily associated with oxygen?
- accurate answers-f
Current flow in a corrosion cell flows which path:
A) anode to metallic path to cathode
B) anode to electronic path to cathode
C) cathode to metallic to anode
D) cathode to electrolyte to anode
E) anode to electrolyte to cathode
Voltage is the measure of the electrochemical difference between two
electrodes
,in an electrolyte
- accurate answers-e
_____ is the measure of the electrochemical difference between two electrodes
in an electrolyte
A) current
B) resistance
C) error
D) ohms
E) ohms-cm
F) voltage
- accurate answers-f
The ________
represents the reversible work to move a unit charge from the electrode
surface
through the solution to the reference electrode
A) current potential
B) electrode potential
C) resistance potential
D) ohms potential
E) Faraday potential
- accurate answers-b
Metals occur in nature in the form of various chemical compounds referred to
as
___
A) ores
B) anodic metals
C) cathodic metals
D) carbohydrates
- accurate answers-a
The amount of energy required by a metal during the refining
process determines the ___ or _______ of the metal.
, A) current, active state
B) voltage, active state
C) active resistance, voltage
D) resistance, active state
E) current, active resistance
- accurate answers-b
During the refining stage of metal the ____ the energy, the more ____
the metal and the more tendency it has to corrode.
A) higher, inactive
B) lower, active
C) higher, active
D) lower, inactive
- accurate answers-c
What is the most common iron ore?
A) hemophite
B) hematite
C) magnesium
D) calcium
E) aluminum
- accurate answers-b
True or false
Iron is considered thermodynamically unstable?
- accurate answers-t
True or false
Gold is more noble than zinc?
- accurate answers-t
Which of the following metals is most active?
A) magnesium
B) copper
