1|Page
NACE CP2 EXAM TESTBANK ACTUAL PREP
QUESTIONS AND WELL REVISED ANSWERS -
LATEST AND COMPLETE UPDATE WITH
VERIFIED SOLUTIONS – ASSURED PASS
Standard conditions for pure metals in the emf series are based on one unit activity
of metal ions in the electrolyte at ___ C with no impurities in the metal or
electrolyte and with reference to a standard ____ electrode.
A) 25, hydrogen
B) 35, hydrogen
C) 25, CSE
D) 35, CSE
E) 25, SSC
F) 35, SSC - ANSWER: _a
The ____ the concentration of metal ions in the electrolyte, the ____ the metal.
A) lower, less active
B) higher, less active
C) lower, more active
D) higher, less active - ANSWER: _b
In reference to the temperature in a corrosion cell, in most cases, electrode at the
_____ temperature becomes the ____
A) lower, anode
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B) higher, cathode
C) lower, cathode
D) higher, anode - ANSWER: _d
During metal fabrication of structures, highly stressed areas of a metal will tend to
be at ____ energy levels, thus more ____ than less stressed areas
A) higher, active
B) lower, active
C) higher, inactive
D) lower, inactive - ANSWER: _a
True or False (t or f):
Corrosion cells may form because of differences in the electrolyte - ANSWER: _t
____ cells are responsible for much of the corrosion that take place in soils,
particularly in bare or poorly coated pipe
A) concentration
B) steady state
C) carbon
D) dynamic
E) telluric - ANSWER: _a
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In many cases in naturally occurring soils, a portion of pipe lying in the more
_____ soil is the ____ and in the less ____soil is the ___.
A) inductive, anode / inductive, cathode
B) inductive, cathode / inductive, anode
C) conductive, anode / conductive, cathode
D) conductive, cathode /conductive, anode - ANSWER: _c
The two most common types of concentration cells involved in promoting
corrosion are ____ and ____.
A) oxygen, nonmettalic ion
B) oxygen, calcium
C) lack of oxygen, metal ion
D) oxygen, metal ion - ANSWER: _d
What is the most common of the cathodic depolarizers, that can maintain and
promote a cathodic reaction?
A) CO2
B) oxygen
C) carbon
D) OH-
E) Hydrogen - ANSWER: _b
Most corrosion on pipelines is on the ____ portion of the pipe
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A) sides
B) top
C) bottom - ANSWER: _c
If a pipe is running through a section of pavement and through a section of non
pavement:
A) anode is the metal outside the pavement, the cathode is the metal under the
pavement
B) anode is the metal under the pavement, the cathode is the metal outside the
pavement
C) cathode is the metal under the pavement, the anode is the metal outside the
pavement - ANSWER: _b
In a metal ion concentration cell, the surface in contact with
____ concentration of metal ions acts as the ____
A) lower, anode
B) lower, cathode
C) higher, anode
D) higher cathode - ANSWER: _a
Theoretically, the potential of a structure changes by about
____mV for each pH unit
A) 40
NACE CP2 EXAM TESTBANK ACTUAL PREP
QUESTIONS AND WELL REVISED ANSWERS -
LATEST AND COMPLETE UPDATE WITH
VERIFIED SOLUTIONS – ASSURED PASS
Standard conditions for pure metals in the emf series are based on one unit activity
of metal ions in the electrolyte at ___ C with no impurities in the metal or
electrolyte and with reference to a standard ____ electrode.
A) 25, hydrogen
B) 35, hydrogen
C) 25, CSE
D) 35, CSE
E) 25, SSC
F) 35, SSC - ANSWER: _a
The ____ the concentration of metal ions in the electrolyte, the ____ the metal.
A) lower, less active
B) higher, less active
C) lower, more active
D) higher, less active - ANSWER: _b
In reference to the temperature in a corrosion cell, in most cases, electrode at the
_____ temperature becomes the ____
A) lower, anode
,2|Page
B) higher, cathode
C) lower, cathode
D) higher, anode - ANSWER: _d
During metal fabrication of structures, highly stressed areas of a metal will tend to
be at ____ energy levels, thus more ____ than less stressed areas
A) higher, active
B) lower, active
C) higher, inactive
D) lower, inactive - ANSWER: _a
True or False (t or f):
Corrosion cells may form because of differences in the electrolyte - ANSWER: _t
____ cells are responsible for much of the corrosion that take place in soils,
particularly in bare or poorly coated pipe
A) concentration
B) steady state
C) carbon
D) dynamic
E) telluric - ANSWER: _a
,3|Page
In many cases in naturally occurring soils, a portion of pipe lying in the more
_____ soil is the ____ and in the less ____soil is the ___.
A) inductive, anode / inductive, cathode
B) inductive, cathode / inductive, anode
C) conductive, anode / conductive, cathode
D) conductive, cathode /conductive, anode - ANSWER: _c
The two most common types of concentration cells involved in promoting
corrosion are ____ and ____.
A) oxygen, nonmettalic ion
B) oxygen, calcium
C) lack of oxygen, metal ion
D) oxygen, metal ion - ANSWER: _d
What is the most common of the cathodic depolarizers, that can maintain and
promote a cathodic reaction?
A) CO2
B) oxygen
C) carbon
D) OH-
E) Hydrogen - ANSWER: _b
Most corrosion on pipelines is on the ____ portion of the pipe
, 4|Page
A) sides
B) top
C) bottom - ANSWER: _c
If a pipe is running through a section of pavement and through a section of non
pavement:
A) anode is the metal outside the pavement, the cathode is the metal under the
pavement
B) anode is the metal under the pavement, the cathode is the metal outside the
pavement
C) cathode is the metal under the pavement, the anode is the metal outside the
pavement - ANSWER: _b
In a metal ion concentration cell, the surface in contact with
____ concentration of metal ions acts as the ____
A) lower, anode
B) lower, cathode
C) higher, anode
D) higher cathode - ANSWER: _a
Theoretically, the potential of a structure changes by about
____mV for each pH unit
A) 40
