Ampp cathodic protection specialist level 1 (cp1) exam questions and verified
answers with rationales ...
AMPP CP1 Cathodic Protection Tester Practice Questions
SECTION 1: CORROSION FUNDAMENTALS & ELECTROCHEMISTRY
Question 1
What is the primary mechanism by which cathodic protection prevents corrosion
on a metallic structure?
A) By increasing the oxygen concentration at the metal surface
B) By making the metal surface the anode in an electrochemical cell
C) By making the metal surface the cathode in an electrochemical cell
D) By applying a coating that completely isolates the metal from the environment
Answer: C
Rationale: Cathodic protection works by making the protected structure the
cathode of an electrochemical cell, thereby preventing the anodic (oxidation)
reaction that causes metal loss. This shifts the potential of the structure into the
immune region, where corrosion cannot occur . At the cathode, reduction
,reactions (such as oxygen or hydrogen reduction) occur instead of metal
dissolution .
Question 2
In electrochemistry, oxidation is defined as:
A) The gain of electrons
B) The loss of electrons
C) The neutralization of charge
D) The reduction of metal ions
Answer: B
Rationale: Oxidation is the electrochemical process where a metal loses electrons,
resulting in corrosion. The mnemonic "LEO" (Lose Electrons Oxidation) helps
remember this concept. For example, Fe → Fe²⁺ + 2e⁻ represents the oxidation of
iron . At the anode, oxidation occurs and metal is consumed .
Question 3
,Which of the following is NOT a required component of an electrochemical
corrosion cell?
A) Anode
B) Cathode
C) Electrolyte
D) External power source
Answer: D
Rationale: The four essential components of a corrosion cell are: anode (where
oxidation occurs), cathode (where reduction occurs), electrolyte (conductive
medium for ionic current), and a metallic path (for electronic current). An external
power source is not required for a corrosion cell to function .
Question 4
What is polarization in cathodic protection?
A) Corrosion of metal
B) Change in potential of a metal due to applied current
, C) Increase in anode consumption
D) Measurement error
Answer: B
Rationale: Polarization occurs when current changes the metal's potential. In
cathodic protection, polarization is the shift of the structure potential in the
negative direction due to the applied protective current. This polarization is what
provides the protection, and it is often used to confirm that protection is effective
.
Question 5
Ohm's Law states the relationship between which three quantities?
A) Power, time, and energy
B) Voltage, current, and resistance
C) Voltage, frequency, and capacitance
D) Current, inductance, and reactance
Answer: B
answers with rationales ...
AMPP CP1 Cathodic Protection Tester Practice Questions
SECTION 1: CORROSION FUNDAMENTALS & ELECTROCHEMISTRY
Question 1
What is the primary mechanism by which cathodic protection prevents corrosion
on a metallic structure?
A) By increasing the oxygen concentration at the metal surface
B) By making the metal surface the anode in an electrochemical cell
C) By making the metal surface the cathode in an electrochemical cell
D) By applying a coating that completely isolates the metal from the environment
Answer: C
Rationale: Cathodic protection works by making the protected structure the
cathode of an electrochemical cell, thereby preventing the anodic (oxidation)
reaction that causes metal loss. This shifts the potential of the structure into the
immune region, where corrosion cannot occur . At the cathode, reduction
,reactions (such as oxygen or hydrogen reduction) occur instead of metal
dissolution .
Question 2
In electrochemistry, oxidation is defined as:
A) The gain of electrons
B) The loss of electrons
C) The neutralization of charge
D) The reduction of metal ions
Answer: B
Rationale: Oxidation is the electrochemical process where a metal loses electrons,
resulting in corrosion. The mnemonic "LEO" (Lose Electrons Oxidation) helps
remember this concept. For example, Fe → Fe²⁺ + 2e⁻ represents the oxidation of
iron . At the anode, oxidation occurs and metal is consumed .
Question 3
,Which of the following is NOT a required component of an electrochemical
corrosion cell?
A) Anode
B) Cathode
C) Electrolyte
D) External power source
Answer: D
Rationale: The four essential components of a corrosion cell are: anode (where
oxidation occurs), cathode (where reduction occurs), electrolyte (conductive
medium for ionic current), and a metallic path (for electronic current). An external
power source is not required for a corrosion cell to function .
Question 4
What is polarization in cathodic protection?
A) Corrosion of metal
B) Change in potential of a metal due to applied current
, C) Increase in anode consumption
D) Measurement error
Answer: B
Rationale: Polarization occurs when current changes the metal's potential. In
cathodic protection, polarization is the shift of the structure potential in the
negative direction due to the applied protective current. This polarization is what
provides the protection, and it is often used to confirm that protection is effective
.
Question 5
Ohm's Law states the relationship between which three quantities?
A) Power, time, and energy
B) Voltage, current, and resistance
C) Voltage, frequency, and capacitance
D) Current, inductance, and reactance
Answer: B
