, NACE CP2 CATHODIC PROTECTION TECHNICIAN LEVEL 2 EXAM 2026/2027 | 100 VERIFIED
QUESTIONS & ANSWERS | AMPP CERTIFICATION PREP | INSTANT DOWNLOAD .
INTRODUCTION
This comprehensive examination contains 100 verified questions designed to reinforce the core
competencies of the NACE CP2 Cathodic Protection Technician Level 2 certification for the 2026/2027
academic year. The CP2 certification is the second level in the NACE/AMPP Cathodic Protection
certification program, designed for professionals with at least one year of related work experience or
those holding a CP1 certificate. The exam assesses intermediate-level knowledge of corrosion theory,
cathodic protection concepts, field measurement techniques, and system troubleshooting.
The questions address four core domains: Corrosion Theory and Electrochemistry (Corrosion Cell,
Nernst Equation, Polarization, Galvanic Series), Cathodic Protection Systems and Criteria (Galvanic vs.
Impressed Current, NACE Criteria, Rectifiers, Anodes), Field Testing and Measurements (Potential
Measurements, Soil Resistivity, Reference Electrodes, IR Drop), and Stray Current, Interference, and
Troubleshooting (AC/DC Interference, Coating Shielding, System Maintenance).
Each item requires application of foundational cathodic protection knowledge drawn from established
NACE CP2 curriculum materials and industry standards, including NACE SP0169. The exam consists of
multiple-choice questions with only one correct answer per question, and a passing score of 70% is
required.
DOMAIN 1: CORROSION THEORY AND ELECTROCHEMISTRY
(Questions 1-25)
Question 1. Corrosion is best described as:
A. A purely chemical oxidation process without electron transfer
B. An electrochemical process involving the flow of electrons and ions
C. A physical abrasion process caused by soil particles
D. A thermal degradation process caused by high temperatures
Correct Answer: B
Rationale: Corrosion is an electrochemical process involving the flow of electrons and ions between
anodic and cathodic sites on a metal surface. It is not purely chemical (electron transfer is essential), not
physical abrasion, and not primarily thermal degradation.
Question 2. Metal loss or corrosion occurs at the:
A. Cathode
B. Anode
,C. Electronic path
D. Metallic path
Correct Answer: B
Rationale: Metal loss occurs at the anode where oxidation of metal takes place (M → Mⁿ⁺ + ne⁻). The
cathode is where reduction occurs and metal loss does not happen. The electrolyte interface and
metallic path facilitate current flow but are not sites of metal dissolution.
Question 3. What are the four essential components required for electrochemical corrosion to occur?
A. Anode, cathode, coating, and rectifier
B. Anode, cathode, electrolyte, and metallic/electronic path
C. Anode, cathode, soil, and moisture
D. Voltage source, anode, cathode, and reference electrode
Correct Answer: B
Rationale: The four essential components of a corrosion cell are anode, cathode, electrolyte, and
metallic/electronic path. Coatings and rectifiers are CP system components, not corrosion cell essentials.
Soil and moisture describe the electrolyte but omit the metallic path.
Question 4. Which of the following metals is most active?
A. Magnesium
B. Copper
C. Iron
D. Nickel
Correct Answer: A
Rationale: Magnesium is the most active (least noble) metal among the options. In the galvanic
series, metals are arranged by their tendency to corrode, with the most active metals at the bottom
(anodic) and the most noble at the top (cathodic).
Question 5. The Nernst Equation expresses the exact electromotive force of a cell in terms of:
A. The resistance and capacitance of the cell
B. The activities of products and reactants of the cell
C. The temperature and pressure of the cell
D. The current and voltage of the cell
Correct Answer: B
Rationale: The Nernst Equation expresses the exact electromotive force (emf) of a cell in terms of
the activities of products and reactants of the cell. It is used to calculate electrode potentials under non-
standard conditions.
, Question 6. Two dissimilar metals are electrically connected and immersed in an electrolyte. According
to the galvanic series, which metal becomes the anode?
A. The more noble metal
B. The more active metal
C. The metal with higher density
D. The metal with higher melting point
Correct Answer: B
Rationale: The more active metal in the galvanic series becomes the anode and corrodes
preferentially. The more noble metal becomes the cathode. Density and melting point are physical
properties unrelated to electrochemical activity in the galvanic series.
Question 7. At the cathode of a corrosion cell, which type of electrochemical reaction takes place?
A. Oxidation of metal
B. Reduction
C. Metal dissolution
D. Electron generation
Correct Answer: B
Rationale: Reduction occurs at the cathode, where electrons are consumed by species such as
oxygen or hydrogen ions. Oxidation and metal dissolution occur at the anode. Electron generation is an
anodic process.
Question 8. In an oxygen concentration cell, what is the anode?
A. The area with more oxygen
B. The area with less oxygen
C. The area with higher temperature
D. The area with lower temperature
Correct Answer: B
Rationale: In an oxygen concentration cell, the area with less oxygen becomes the anode because it
is more active. The area with more oxygen becomes the cathode. This is a common cause of corrosion in
soils, particularly in bare or poorly coated pipe.
Question 9. The driving force for electrochemical corrosion is:
A. Current
B. Voltage
QUESTIONS & ANSWERS | AMPP CERTIFICATION PREP | INSTANT DOWNLOAD .
INTRODUCTION
This comprehensive examination contains 100 verified questions designed to reinforce the core
competencies of the NACE CP2 Cathodic Protection Technician Level 2 certification for the 2026/2027
academic year. The CP2 certification is the second level in the NACE/AMPP Cathodic Protection
certification program, designed for professionals with at least one year of related work experience or
those holding a CP1 certificate. The exam assesses intermediate-level knowledge of corrosion theory,
cathodic protection concepts, field measurement techniques, and system troubleshooting.
The questions address four core domains: Corrosion Theory and Electrochemistry (Corrosion Cell,
Nernst Equation, Polarization, Galvanic Series), Cathodic Protection Systems and Criteria (Galvanic vs.
Impressed Current, NACE Criteria, Rectifiers, Anodes), Field Testing and Measurements (Potential
Measurements, Soil Resistivity, Reference Electrodes, IR Drop), and Stray Current, Interference, and
Troubleshooting (AC/DC Interference, Coating Shielding, System Maintenance).
Each item requires application of foundational cathodic protection knowledge drawn from established
NACE CP2 curriculum materials and industry standards, including NACE SP0169. The exam consists of
multiple-choice questions with only one correct answer per question, and a passing score of 70% is
required.
DOMAIN 1: CORROSION THEORY AND ELECTROCHEMISTRY
(Questions 1-25)
Question 1. Corrosion is best described as:
A. A purely chemical oxidation process without electron transfer
B. An electrochemical process involving the flow of electrons and ions
C. A physical abrasion process caused by soil particles
D. A thermal degradation process caused by high temperatures
Correct Answer: B
Rationale: Corrosion is an electrochemical process involving the flow of electrons and ions between
anodic and cathodic sites on a metal surface. It is not purely chemical (electron transfer is essential), not
physical abrasion, and not primarily thermal degradation.
Question 2. Metal loss or corrosion occurs at the:
A. Cathode
B. Anode
,C. Electronic path
D. Metallic path
Correct Answer: B
Rationale: Metal loss occurs at the anode where oxidation of metal takes place (M → Mⁿ⁺ + ne⁻). The
cathode is where reduction occurs and metal loss does not happen. The electrolyte interface and
metallic path facilitate current flow but are not sites of metal dissolution.
Question 3. What are the four essential components required for electrochemical corrosion to occur?
A. Anode, cathode, coating, and rectifier
B. Anode, cathode, electrolyte, and metallic/electronic path
C. Anode, cathode, soil, and moisture
D. Voltage source, anode, cathode, and reference electrode
Correct Answer: B
Rationale: The four essential components of a corrosion cell are anode, cathode, electrolyte, and
metallic/electronic path. Coatings and rectifiers are CP system components, not corrosion cell essentials.
Soil and moisture describe the electrolyte but omit the metallic path.
Question 4. Which of the following metals is most active?
A. Magnesium
B. Copper
C. Iron
D. Nickel
Correct Answer: A
Rationale: Magnesium is the most active (least noble) metal among the options. In the galvanic
series, metals are arranged by their tendency to corrode, with the most active metals at the bottom
(anodic) and the most noble at the top (cathodic).
Question 5. The Nernst Equation expresses the exact electromotive force of a cell in terms of:
A. The resistance and capacitance of the cell
B. The activities of products and reactants of the cell
C. The temperature and pressure of the cell
D. The current and voltage of the cell
Correct Answer: B
Rationale: The Nernst Equation expresses the exact electromotive force (emf) of a cell in terms of
the activities of products and reactants of the cell. It is used to calculate electrode potentials under non-
standard conditions.
, Question 6. Two dissimilar metals are electrically connected and immersed in an electrolyte. According
to the galvanic series, which metal becomes the anode?
A. The more noble metal
B. The more active metal
C. The metal with higher density
D. The metal with higher melting point
Correct Answer: B
Rationale: The more active metal in the galvanic series becomes the anode and corrodes
preferentially. The more noble metal becomes the cathode. Density and melting point are physical
properties unrelated to electrochemical activity in the galvanic series.
Question 7. At the cathode of a corrosion cell, which type of electrochemical reaction takes place?
A. Oxidation of metal
B. Reduction
C. Metal dissolution
D. Electron generation
Correct Answer: B
Rationale: Reduction occurs at the cathode, where electrons are consumed by species such as
oxygen or hydrogen ions. Oxidation and metal dissolution occur at the anode. Electron generation is an
anodic process.
Question 8. In an oxygen concentration cell, what is the anode?
A. The area with more oxygen
B. The area with less oxygen
C. The area with higher temperature
D. The area with lower temperature
Correct Answer: B
Rationale: In an oxygen concentration cell, the area with less oxygen becomes the anode because it
is more active. The area with more oxygen becomes the cathode. This is a common cause of corrosion in
soils, particularly in bare or poorly coated pipe.
Question 9. The driving force for electrochemical corrosion is:
A. Current
B. Voltage
