1
NACE CP2 - EXAM QUESTIONS WITH
CORRECT VERIFIED SOLUTIONS
100% GUARANTEED PASS ( 2026/
2027 LATEST UPDATE)
Most common used reference electrode for measuring potentials of
underground structures?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE ANSWER: a
True or false (t or f)
The potential of a reference electrode in the sun can decrease from 10 to 50mV
versus an electrode kept in the dark? ANSWER: t
Which reference electrode is mostly commonly used in seawater?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
, 2
E) SHE ANSWER: b
Which reference electrode is mostly commonly used in concrete structures?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE ANSWER: b
Which of the following is primarily a laboratory electrode?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc ANSWER: c
When doing a structure to electrolyte potential , the structure is connected via
the terminal and the reference is connected via the terminal
A) negative , positive
B) positive, negative ANSWER: b
A potential of -0.810Vcse converted to Calomel (SCE)
A) +0.306 sce
, 3
B) -0.750 sce
C) -0.735 sce ANSWER: c
A potential of -0.810Vcse converted to Ag/AgCI (SSC)
A) +0.306 ssc
B) -0.735 ssc
C) -0.750 ssc ANSWER: c
A potential of -0.810Vcse converted to Zinc (ZRE)
A) +0.306 zre
B) -0.735 zre
C) -0.750 zre ANSWER: a
True or False (t or f)
The potential of a STATIONARY reference electrode should be checked from
time to time
with a portable reference electrode that is known to be accurate under "no
current" conditions. ANSWER: t
As current is impressed on a metal over time, where does polarization occur?
A) at the anode and the cathode
B) at the anode
, 4
C) at the cathode ANSWER: a
Polarization the potential difference between the anode and the cathode
and by Ohm's Law, the current and the corrosion rate until an
equilibrium is reached
A) lowers, drops, decreases
B) increases, increases, decreases
C) lowers, increases, decreases
D) lowers, drops, decreases ANSWER: d
Depolarizers include:
I dissolved oxygen
II microbiological activity
III water flow
A) only I
B) only II
C) I and II
D) I, II , III ANSWER: d
The name for the current that exists during the steady state of polarization is
called the of the system
A) telluric current
B) dynamic current
NACE CP2 - EXAM QUESTIONS WITH
CORRECT VERIFIED SOLUTIONS
100% GUARANTEED PASS ( 2026/
2027 LATEST UPDATE)
Most common used reference electrode for measuring potentials of
underground structures?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE ANSWER: a
True or false (t or f)
The potential of a reference electrode in the sun can decrease from 10 to 50mV
versus an electrode kept in the dark? ANSWER: t
Which reference electrode is mostly commonly used in seawater?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
, 2
E) SHE ANSWER: b
Which reference electrode is mostly commonly used in concrete structures?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc
E) SHE ANSWER: b
Which of the following is primarily a laboratory electrode?
A) CSE
B) Ag/AgCI
C) Calomel
D) Zinc ANSWER: c
When doing a structure to electrolyte potential , the structure is connected via
the terminal and the reference is connected via the terminal
A) negative , positive
B) positive, negative ANSWER: b
A potential of -0.810Vcse converted to Calomel (SCE)
A) +0.306 sce
, 3
B) -0.750 sce
C) -0.735 sce ANSWER: c
A potential of -0.810Vcse converted to Ag/AgCI (SSC)
A) +0.306 ssc
B) -0.735 ssc
C) -0.750 ssc ANSWER: c
A potential of -0.810Vcse converted to Zinc (ZRE)
A) +0.306 zre
B) -0.735 zre
C) -0.750 zre ANSWER: a
True or False (t or f)
The potential of a STATIONARY reference electrode should be checked from
time to time
with a portable reference electrode that is known to be accurate under "no
current" conditions. ANSWER: t
As current is impressed on a metal over time, where does polarization occur?
A) at the anode and the cathode
B) at the anode
, 4
C) at the cathode ANSWER: a
Polarization the potential difference between the anode and the cathode
and by Ohm's Law, the current and the corrosion rate until an
equilibrium is reached
A) lowers, drops, decreases
B) increases, increases, decreases
C) lowers, increases, decreases
D) lowers, drops, decreases ANSWER: d
Depolarizers include:
I dissolved oxygen
II microbiological activity
III water flow
A) only I
B) only II
C) I and II
D) I, II , III ANSWER: d
The name for the current that exists during the steady state of polarization is
called the of the system
A) telluric current
B) dynamic current
