AMPP Cathodic Protection Specialist
Level 1 (CP1) Certification Exam –
Practice Questions with Verified
Answers & Rationales
This comprehensive practice guide is designed for candidates
preparing for the AMPP/NACE Cathodic Protection Tester (CP1)
certification examination. The CP1 certification evaluates essential
knowledge and practical skills required to test, evaluate, and
determine the effectiveness of cathodic protection systems on buried
or submerged metallic structures.
EXAM OVERVIEW
Category Details
Certificatio CP1 – Cathodic
n Protection Tester
Issuing AMPP (formerly
Body NACE International)
,Exam Multiple-choice and
Format scenario-based
questions
Key Topics Corrosion
fundamentals, CP
theory, field
measurements,
reference electrodes,
rectifiers, safety,
standards
Passing 70%
Score
Prerequisit High school diploma
es or GED; 6 months CP
work experience
recommended
SECTION 1: CORROSION FUNDAMENTALS &
ELECTROCHEMISTRY
Question 1
What is the basic principle of corrosion of iron in water?
A) Oxidation (loss of electrons) at the anode only
B) Reduction (gain of electrons) at the cathode only
,C) Both oxidation at the anode and reduction at the cathode
D) Neither
Correct Answer: C
Rationale: Corrosion is an electrochemical process requiring both
anodic (oxidation) and cathodic (reduction) reactions. At the anode,
metal atoms lose electrons (oxidation); at the cathode, electrons are
consumed (reduction). Both reactions must occur for corrosion to
proceed.
Question 2
In an electrochemical corrosion cell, oxidation occurs at which
electrode?
A) The cathode
B) The anode
C) The reference electrode
D) The electrolyte
Correct Answer: B
Rationale: Oxidation (loss of electrons) occurs at the anode, which is
the site of metal dissolution and corrosion. Reduction occurs at the
cathode.
Question 3
, In a galvanic corrosion cell, electrons flow from the _____ to the _____
through the metallic path.
A) Cathode to anode
B) Anode to cathode
C) Anode to electrolyte
D) Cathode to electrolyte
Correct Answer: B
Rationale: Electrons are produced at the anode (oxidation) and travel
through the metal (metallic path) to the cathode where they are
consumed. Conventional current flows in the opposite direction
through the electrolyte.
Question 4
What are the four essential components of an electrochemical
corrosion cell?
A) Anode, cathode, electrolyte, and metallic path
B) Anode, cathode, electrolyte, and external power source
C) Anode, cathode, reference electrode, and rectifier
D) Anode, cathode, metallic path, and rectifier
Correct Answer: A
Rationale: The four essential components of a corrosion cell are:
anode (where oxidation occurs), cathode (where reduction occurs),
electrolyte (conductive medium), and metallic path (electrical
connection).
Level 1 (CP1) Certification Exam –
Practice Questions with Verified
Answers & Rationales
This comprehensive practice guide is designed for candidates
preparing for the AMPP/NACE Cathodic Protection Tester (CP1)
certification examination. The CP1 certification evaluates essential
knowledge and practical skills required to test, evaluate, and
determine the effectiveness of cathodic protection systems on buried
or submerged metallic structures.
EXAM OVERVIEW
Category Details
Certificatio CP1 – Cathodic
n Protection Tester
Issuing AMPP (formerly
Body NACE International)
,Exam Multiple-choice and
Format scenario-based
questions
Key Topics Corrosion
fundamentals, CP
theory, field
measurements,
reference electrodes,
rectifiers, safety,
standards
Passing 70%
Score
Prerequisit High school diploma
es or GED; 6 months CP
work experience
recommended
SECTION 1: CORROSION FUNDAMENTALS &
ELECTROCHEMISTRY
Question 1
What is the basic principle of corrosion of iron in water?
A) Oxidation (loss of electrons) at the anode only
B) Reduction (gain of electrons) at the cathode only
,C) Both oxidation at the anode and reduction at the cathode
D) Neither
Correct Answer: C
Rationale: Corrosion is an electrochemical process requiring both
anodic (oxidation) and cathodic (reduction) reactions. At the anode,
metal atoms lose electrons (oxidation); at the cathode, electrons are
consumed (reduction). Both reactions must occur for corrosion to
proceed.
Question 2
In an electrochemical corrosion cell, oxidation occurs at which
electrode?
A) The cathode
B) The anode
C) The reference electrode
D) The electrolyte
Correct Answer: B
Rationale: Oxidation (loss of electrons) occurs at the anode, which is
the site of metal dissolution and corrosion. Reduction occurs at the
cathode.
Question 3
, In a galvanic corrosion cell, electrons flow from the _____ to the _____
through the metallic path.
A) Cathode to anode
B) Anode to cathode
C) Anode to electrolyte
D) Cathode to electrolyte
Correct Answer: B
Rationale: Electrons are produced at the anode (oxidation) and travel
through the metal (metallic path) to the cathode where they are
consumed. Conventional current flows in the opposite direction
through the electrolyte.
Question 4
What are the four essential components of an electrochemical
corrosion cell?
A) Anode, cathode, electrolyte, and metallic path
B) Anode, cathode, electrolyte, and external power source
C) Anode, cathode, reference electrode, and rectifier
D) Anode, cathode, metallic path, and rectifier
Correct Answer: A
Rationale: The four essential components of a corrosion cell are:
anode (where oxidation occurs), cathode (where reduction occurs),
electrolyte (conductive medium), and metallic path (electrical
connection).
