NACE CP2 LATEST 202T TEST QUESTIONS AND SOLUTIONS
RATED A+
✔✔The cathodic protection criteria for steel includes which of the following (select all
that apply);
A. potential of -.850mv CSE or more negative with current applied after IR drop is
considered
B. polarized potential of -.850mv CSE or more negative
C. polarization of 100mv or greater
D. polarized potential of -.790mv SSC or more negative - ✔✔A, B, C, D
✔✔When cathodic protection is applied to a corroding steel surface, it shifts the
corrosion cell potential as follows:
A. No change
B. Cathode more negative
C. Cathode more positive
D. Anode more positive - ✔✔B
✔✔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 - ✔✔C
✔✔Which of the following are depolarizers (select all that apply):
A. Dissolved Oxygen
B. Increased Electrolyte Velocity
C. Bacteria Action
D. Current pickup on the metal - ✔✔A, B, C
✔✔Which of the following factors affect polarization (select all that apply):
A. Current
B. ion concentration
C. anode/cathode ratio
D. temperature - ✔✔A, B, C, D
✔✔The current requirement for cathodic protection of a structure will increase with a:
A. decrease in PH
B. decrease in temperature
, C. decrease in oxygen
D. decrease in velocity - ✔✔A
✔✔Which of the following are types of polarization? (select all that apply)
A. Concentration
B. Activation
C. Temperature
D. Velocity - ✔✔A, B
✔✔In a galvanic anode system, the driving voltage is due to the:
A. electrolyte
B. anode to structure couple
C. structure connection
D. anode backfill - ✔✔B
✔✔Which of the following will decrease cathodic protection current requirements?
A. increased PH
B. Increased oxygen
C. increased temperature
D. increased agitation - ✔✔A
✔✔AC Voltages on pipelines do NOT result from:
A. resistive (conductive) coupling
B. electrostatic (capacitive) coupling
C. electromagnetic induction coupling
D. thermodynamic coupling - ✔✔D
✔✔On a cathodically protected pipeline, AC corrosion can be expected at which current
densities (select all that apply)
A. 30 ma/m2
B. 10 A/m2
C. 110 A/m2
D. 200 A/m2 - ✔✔C, D
✔✔ Nernst Equation - ✔✔Demonstrates how the metal ion concentration in the
electrolyte affects the potential of the electrode
✔✔EMF series - ✔✔The arrangement of elements according to their electrode potential,
or their tendency to corrode vs SHE standard hydrogen electrode
RATED A+
✔✔The cathodic protection criteria for steel includes which of the following (select all
that apply);
A. potential of -.850mv CSE or more negative with current applied after IR drop is
considered
B. polarized potential of -.850mv CSE or more negative
C. polarization of 100mv or greater
D. polarized potential of -.790mv SSC or more negative - ✔✔A, B, C, D
✔✔When cathodic protection is applied to a corroding steel surface, it shifts the
corrosion cell potential as follows:
A. No change
B. Cathode more negative
C. Cathode more positive
D. Anode more positive - ✔✔B
✔✔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 - ✔✔C
✔✔Which of the following are depolarizers (select all that apply):
A. Dissolved Oxygen
B. Increased Electrolyte Velocity
C. Bacteria Action
D. Current pickup on the metal - ✔✔A, B, C
✔✔Which of the following factors affect polarization (select all that apply):
A. Current
B. ion concentration
C. anode/cathode ratio
D. temperature - ✔✔A, B, C, D
✔✔The current requirement for cathodic protection of a structure will increase with a:
A. decrease in PH
B. decrease in temperature
, C. decrease in oxygen
D. decrease in velocity - ✔✔A
✔✔Which of the following are types of polarization? (select all that apply)
A. Concentration
B. Activation
C. Temperature
D. Velocity - ✔✔A, B
✔✔In a galvanic anode system, the driving voltage is due to the:
A. electrolyte
B. anode to structure couple
C. structure connection
D. anode backfill - ✔✔B
✔✔Which of the following will decrease cathodic protection current requirements?
A. increased PH
B. Increased oxygen
C. increased temperature
D. increased agitation - ✔✔A
✔✔AC Voltages on pipelines do NOT result from:
A. resistive (conductive) coupling
B. electrostatic (capacitive) coupling
C. electromagnetic induction coupling
D. thermodynamic coupling - ✔✔D
✔✔On a cathodically protected pipeline, AC corrosion can be expected at which current
densities (select all that apply)
A. 30 ma/m2
B. 10 A/m2
C. 110 A/m2
D. 200 A/m2 - ✔✔C, D
✔✔ Nernst Equation - ✔✔Demonstrates how the metal ion concentration in the
electrolyte affects the potential of the electrode
✔✔EMF series - ✔✔The arrangement of elements according to their electrode potential,
or their tendency to corrode vs SHE standard hydrogen electrode
