AMPP Cathodic Protection Technician
(CP2) Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
Q1. What is the primary purpose of a cathodic protection system?
A. To increase the mechanical strength of a structure
B. To prevent or reduce corrosion by making the protected structure the
cathode
C. To eliminate the need for coatings
D. To increase the conductivity of the electrolyte
Answer: B. To prevent or reduce corrosion by making the protected
structure the cathode
Rationale: Cathodic protection controls corrosion by supplying current so
that the structure being protected functions as the cathode of an
electrochemical cell.
,Q2. In an impressed-current cathodic protection system, what is the
primary function of the rectifier?
A. Convert DC to AC
B. Convert AC electrical power to controlled DC output
C. Increase soil resistivity
D. Measure pipe-to-soil potential
Answer: B. Convert AC electrical power to controlled DC output
Rationale: The rectifier converts alternating current into direct current that
can be adjusted and supplied to the CP anodes.
Q3. Which component is normally considered the source of protective
current in an impressed-current CP system?
A. Reference electrode
B. Test station
C. Anode
D. Protected pipeline
Answer: C. Anode
,Rationale: The anode discharges current into the electrolyte, allowing the
current to reach the structure being protected.
Q4. In a galvanic CP system, the anode is normally made from a material
that is:
A. More noble than the protected structure
B. Less active than the protected structure
C. More active than the protected structure
D. Electrically isolated from the electrolyte
Answer: C. More active than the protected structure
Rationale: Galvanic anodes must have a more negative electrochemical
potential than the protected metal so they preferentially corrode.
Q5. Which of the following is a common galvanic anode material?
A. Copper
B. Platinum only
C. Zinc
D. Stainless steel
Answer: C. Zinc
, Rationale: Zinc is widely used as a sacrificial anode, along with aluminum
and magnesium alloys, depending on the environment.
Q6. What is the electrolyte in a buried pipeline CP system?
A. The pipeline steel
B. The surrounding soil
C. The rectifier
D. The test lead
Answer: B. The surrounding soil
Rationale: The soil provides the ionic path between the CP anode system
and the buried structure.
Q7. What is the main purpose of a reference electrode during CP testing?
A. To provide a permanent source of CP current
B. To provide a relatively stable reference potential for voltage
measurements
C. To increase anode output
D. To interrupt CP current
(CP2) Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
Q1. What is the primary purpose of a cathodic protection system?
A. To increase the mechanical strength of a structure
B. To prevent or reduce corrosion by making the protected structure the
cathode
C. To eliminate the need for coatings
D. To increase the conductivity of the electrolyte
Answer: B. To prevent or reduce corrosion by making the protected
structure the cathode
Rationale: Cathodic protection controls corrosion by supplying current so
that the structure being protected functions as the cathode of an
electrochemical cell.
,Q2. In an impressed-current cathodic protection system, what is the
primary function of the rectifier?
A. Convert DC to AC
B. Convert AC electrical power to controlled DC output
C. Increase soil resistivity
D. Measure pipe-to-soil potential
Answer: B. Convert AC electrical power to controlled DC output
Rationale: The rectifier converts alternating current into direct current that
can be adjusted and supplied to the CP anodes.
Q3. Which component is normally considered the source of protective
current in an impressed-current CP system?
A. Reference electrode
B. Test station
C. Anode
D. Protected pipeline
Answer: C. Anode
,Rationale: The anode discharges current into the electrolyte, allowing the
current to reach the structure being protected.
Q4. In a galvanic CP system, the anode is normally made from a material
that is:
A. More noble than the protected structure
B. Less active than the protected structure
C. More active than the protected structure
D. Electrically isolated from the electrolyte
Answer: C. More active than the protected structure
Rationale: Galvanic anodes must have a more negative electrochemical
potential than the protected metal so they preferentially corrode.
Q5. Which of the following is a common galvanic anode material?
A. Copper
B. Platinum only
C. Zinc
D. Stainless steel
Answer: C. Zinc
, Rationale: Zinc is widely used as a sacrificial anode, along with aluminum
and magnesium alloys, depending on the environment.
Q6. What is the electrolyte in a buried pipeline CP system?
A. The pipeline steel
B. The surrounding soil
C. The rectifier
D. The test lead
Answer: B. The surrounding soil
Rationale: The soil provides the ionic path between the CP anode system
and the buried structure.
Q7. What is the main purpose of a reference electrode during CP testing?
A. To provide a permanent source of CP current
B. To provide a relatively stable reference potential for voltage
measurements
C. To increase anode output
D. To interrupt CP current
