NACE CP2 STUDY EXAM STUDY GUIDE 2026
QUESTIONS WITH ANSWERS GRADED A+
◉ Faraday's law calculates. Answer: metal lost due to current over
time
◉ the stability of a copper-copper sulfate reference electrode does
not vary with. Answer: a saturated solution of the copper ions.
◉ if a digital meter displays a negative value while measure a
voltage across a resistor, it indicates. Answer:
◉ Which of the following are depolarizers?
i.Dissolved oxygen
ii. increased electrolyte velocity
iii. bacteria action
iv. current pickup on the metal. Answer: i, ii, iii only
◉ polarization occurs
a. at the anode surface only
,b. at the cathode surface only
c. at the anode and cathode surfaces
d. in the metallic path. Answer: C. at the anode and cathode surfaces
◉ Which of the following factors affect polarization?
a. current
b. ion concentration
c. anode/cathode ratio
d. temperature. Answer: All of the above
◉ Which of the following are types of polarization?
i. concentration
ii. activation
iii. temperature
iv. velocity. Answer: i and ii
◉ The measure of the electrochemical difference between two
metals in an electrolyte is which of the following?
a. amps
,b. volts
c. ohms
d siemans. Answer: b. volts
◉ the relationship between current and polarization is described by
which of the following?
i. Corrosion cell current decreases with increased polarization.
ii. polarization increases with increased current.
iii. current increases with increased polarization
iv. polarization decreases with increased current. Answer: i and ii
only
◉ a passivating material will exhibit which of the following
properties?
i. does not corrode at all
ii. corrosion increases as current increases initially
iii. corrosion current decreases after a certain point.
, iv. corrosion current increases beyond the passive region. Answer: ii,
iii, and iv only
◉ In a standard emf series of metals, which of the following is
represented?
a. the potential of a metal is measured in a saturated solution of
copper-sulfate
b. current is measured between the most noble and most active
metals.
c. the potential is measured with respect to a standard hydrogen
electrode.
d. the total number of electrons is determined.. Answer: c. the
potential is measured with respect to a standard hydrogen electrode
◉ if two different metals are connected together in an electrolyte,
the metal with the
a. most negative potential is the cathode
b. most positive potential is the cathode
c. positive potential will corrode
QUESTIONS WITH ANSWERS GRADED A+
◉ Faraday's law calculates. Answer: metal lost due to current over
time
◉ the stability of a copper-copper sulfate reference electrode does
not vary with. Answer: a saturated solution of the copper ions.
◉ if a digital meter displays a negative value while measure a
voltage across a resistor, it indicates. Answer:
◉ Which of the following are depolarizers?
i.Dissolved oxygen
ii. increased electrolyte velocity
iii. bacteria action
iv. current pickup on the metal. Answer: i, ii, iii only
◉ polarization occurs
a. at the anode surface only
,b. at the cathode surface only
c. at the anode and cathode surfaces
d. in the metallic path. Answer: C. at the anode and cathode surfaces
◉ Which of the following factors affect polarization?
a. current
b. ion concentration
c. anode/cathode ratio
d. temperature. Answer: All of the above
◉ Which of the following are types of polarization?
i. concentration
ii. activation
iii. temperature
iv. velocity. Answer: i and ii
◉ The measure of the electrochemical difference between two
metals in an electrolyte is which of the following?
a. amps
,b. volts
c. ohms
d siemans. Answer: b. volts
◉ the relationship between current and polarization is described by
which of the following?
i. Corrosion cell current decreases with increased polarization.
ii. polarization increases with increased current.
iii. current increases with increased polarization
iv. polarization decreases with increased current. Answer: i and ii
only
◉ a passivating material will exhibit which of the following
properties?
i. does not corrode at all
ii. corrosion increases as current increases initially
iii. corrosion current decreases after a certain point.
, iv. corrosion current increases beyond the passive region. Answer: ii,
iii, and iv only
◉ In a standard emf series of metals, which of the following is
represented?
a. the potential of a metal is measured in a saturated solution of
copper-sulfate
b. current is measured between the most noble and most active
metals.
c. the potential is measured with respect to a standard hydrogen
electrode.
d. the total number of electrons is determined.. Answer: c. the
potential is measured with respect to a standard hydrogen electrode
◉ if two different metals are connected together in an electrolyte,
the metal with the
a. most negative potential is the cathode
b. most positive potential is the cathode
c. positive potential will corrode
