NACE (NATIONAL ASSOCIATION OF
CORROSION ENGINEERS) CP2 – EXAM
WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS RATED A+
_____ 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
The ____ expresses the exact electromotive force of a cell in
terms of the activities of products and reactants of the cell
A) Ernest Equation
B) Faraday Equation
C) Ohm's Law Equation
D) Nernst Equation
E) Uniform Equation Correct Answer d
Given the Nernst Equation, using the Valence of Common Metals
Table, and using the partial Standard emf Series of Metals solve:
What is the potential of zinc in a 0.01 molar zinc chloride solution
at 25C?
CORROSION ENGINEERS) CP2 – EXAM
WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS RATED A+
_____ 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
The ____ expresses the exact electromotive force of a cell in
terms of the activities of products and reactants of the cell
A) Ernest Equation
B) Faraday Equation
C) Ohm's Law Equation
D) Nernst Equation
E) Uniform Equation Correct Answer d
Given the Nernst Equation, using the Valence of Common Metals
Table, and using the partial Standard emf Series of Metals solve:
What is the potential of zinc in a 0.01 molar zinc chloride solution
at 25C?
