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NACE CP2 – LATEST EXAM QUESTION AND ANSWERS LATEST 2023|GRADED A+|
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NACE CP2 – LATEST EXAM QUESTION ANDANSWERS LATEST 2023|GRADED A+|
NACE 2008 Student Manual!
START OF CHAPTER 1
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 - correct answer d
Metal loss or corrosion occurs at the
A) cathode
B) anode
C) electronic path
D) metallic path - correct answer 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 - correct answer c
True or False (t or f):
Ions exist only in the electrolyte? - correct answer 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 - correct answer 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- - correct answer 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 - correct answer a
True or false
Is oxidation necessarily associated with oxygen? - correct answer 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 - correct answer 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 - correct answer 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 - correct answer 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 - correct answer 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 - correct answer 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 - correct answer c
What is the most common iron ore?
A) hemophite
B) hematite
C) magnesium
D) calcium
E) aluminum - correct answer b
True or false
Iron is considered thermodynamically unstable? - correct answer t
True or false
Gold is more noble than zinc? - correct answer t
Which of the following metals is most active?
A) magnesium
B) copper
C) iron
D) nickel
, E) platinum - correct answer a
Electromotive force (emf), is ____ in sign and magnitude to the electrode potential of
the ___ less the electrode potential of the ____.
A) unequal, cathode, anode
B) unequal, anode, cathode
C) equal, cathode, anode
D) equal, anode, cathode - correct answer d
The driving force for electrochemical corrosion is ____
A) current
B) voltage
C) resistance
D) ohms
E) siemens-cm - correct answer b
In relation to a corrosion cell, ____ is the net transfer of electric charge per unit time
A) current
B) voltage
C) resistance
D) ohms
E) siemens-cm - correct answer a
If a metallic path connects two electrodes inside an electrolyte, the ____ difference will
cause a
____ to flow between them
A) current, voltage
B) resistance, current
C) resistance, voltage
D) voltage, current
E) current, resistance - correct answer d
The more useful method of organizing metals in order of their tendency to corrode is
_____
A) emf series
B) pgp series
C) nuclear series
D) electron series
E) galvanic series - correct answer e
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