2026 NACE CIP LEVEL 1 EXAM – COMPLETE QUESTIONS WITH
DETAILED CORRECT ANSWERS Latest Update 2026 |
Comprehensive Study Guide | Verified Answers with
Rationales
1. Dew point is the temperature at which:
A) Water freezes
B) Humidity decreases
C) Condensation occurs
D) The air is saturated
Correct Answer: C) Condensation occurs
Rationale: The dew point is the saturation temperature. If the surface
temperature falls below the dew point, moisture will condense on the surface.
This is a critical environmental measurement for coating application .
2. What is the function of the electrolyte in a corrosion cell?
A) Allows the flow of electrons between anode and cathode
B) Provides the metallic connection between anode and cathode
C) Allows the passage of ions to connect the corrosion cell
D) Prevents the flow of electrical current
Correct Answer: C) Allows the passage of ions to connect the corrosion
cell
Rationale: The electrolyte is a medium that conducts ionic current, allowing
the passage of ions to connect the corrosion cell. This ionic flow completes
,the electrical circuit enabling the anodic and cathodic reactions to proceed
continuously .
3. What is the function of the metallic pathway in a corrosion cell?
A) Allows the passage of ions to connect the corrosion cell
B) Allows the flow of electrons to connect the corrosion cell
C) Prevents corrosion from occurring
D) Acts as the electrolyte
Correct Answer: B) Allows the flow of electrons to connect the corrosion
cell
Rationale: The metallic pathway is the conductor that allows electrons to flow
from the anode to the cathode. This flow of electrons completes the electrical
circuit required for corrosion to occur .
4. What is the galvanic series?
A) A listing of metals in order of their melting points
B) A listing of metals in order of reactivity (more or less noble) in seawater
at 25°C
C) A listing of metals in order of their density
D) A listing of metals in order of their hardness
Correct Answer: B) A listing of metals in order of reactivity (more or
less noble) in seawater at 25°C
Rationale: The galvanic series is a listing of metals and alloys in order of their
electrochemical reactivity in seawater (or other specific electrolytes). The
series ranks metals from more noble (cathodic) to less noble (anodic) .
,5. The general rules of galvanic corrosion are:
A) The more noble metal will corrode preferentially
B) The less noble (or more reactive) metal when connected to a more noble
metal will corrode preferentially
C) Both metals will corrode equally
D) Neither metal will corrode
Correct Answer: B) The less noble (or more reactive) metal when
connected to a more noble metal will corrode preferentially
Rationale: When dissimilar metals are connected in an electrolyte, the less
noble (more active) metal becomes the anode and corrodes preferentially.
The more noble metal becomes the cathode and is protected .
6. Galvanic corrosion occurs on which of the following substrates?
A) Concrete
B) Plastic
C) Metal
D) Wood
Correct Answer: C) Metal
Rationale: Galvanic corrosion occurs on metal substrates when dissimilar
metals are in electrical contact in the presence of an electrolyte. The less
noble metal corrodes preferentially .
7. The form of corrosion that has the largest potential for unexpected
catastrophic failure is:
A) General Corrosion
B) Galvanic Corrosion
C) Localized Corrosion (Pitting)
D) Atmospheric Corrosion
, *Correct Answer: C) Localized Corrosion (Pitting) *
Rationale: Pitting is the most detrimental form of corrosion attack and is
often responsible for failures of components in process plants, where it
accounts at least 90% of the metal damage by corrosion. It is considered
more dangerous than uniform corrosion because it is more difficult to detect,
predict and prevent .
8. Passivation can best be described as:
A) The removal of all surface contaminants
B) A protective metallic oxide surface layer that slows corrosion
C) The application of a protective coating
D) The process of removing rust from steel
Correct Answer: B) A protective metallic oxide surface layer that slows
corrosion
Rationale: Passivation is the formation of a protective metallic oxide surface
layer that slows corrosion. A common example is stainless steel, which forms
a chromium oxide layer that provides corrosion protection .
9. Relative humidity is:
A) The amount of water in the air in grams
B) A measure of the amount of moisture in the air compared to saturation
level
C) The temperature at which condensation occurs
D) The temperature of the air
Correct Answer: B) A measure of the amount of moisture in the air
compared to saturation level
Rationale: Relative humidity is a measure of the amount of moisture in the
air compared to saturation level. It is expressed as a percentage .
DETAILED CORRECT ANSWERS Latest Update 2026 |
Comprehensive Study Guide | Verified Answers with
Rationales
1. Dew point is the temperature at which:
A) Water freezes
B) Humidity decreases
C) Condensation occurs
D) The air is saturated
Correct Answer: C) Condensation occurs
Rationale: The dew point is the saturation temperature. If the surface
temperature falls below the dew point, moisture will condense on the surface.
This is a critical environmental measurement for coating application .
2. What is the function of the electrolyte in a corrosion cell?
A) Allows the flow of electrons between anode and cathode
B) Provides the metallic connection between anode and cathode
C) Allows the passage of ions to connect the corrosion cell
D) Prevents the flow of electrical current
Correct Answer: C) Allows the passage of ions to connect the corrosion
cell
Rationale: The electrolyte is a medium that conducts ionic current, allowing
the passage of ions to connect the corrosion cell. This ionic flow completes
,the electrical circuit enabling the anodic and cathodic reactions to proceed
continuously .
3. What is the function of the metallic pathway in a corrosion cell?
A) Allows the passage of ions to connect the corrosion cell
B) Allows the flow of electrons to connect the corrosion cell
C) Prevents corrosion from occurring
D) Acts as the electrolyte
Correct Answer: B) Allows the flow of electrons to connect the corrosion
cell
Rationale: The metallic pathway is the conductor that allows electrons to flow
from the anode to the cathode. This flow of electrons completes the electrical
circuit required for corrosion to occur .
4. What is the galvanic series?
A) A listing of metals in order of their melting points
B) A listing of metals in order of reactivity (more or less noble) in seawater
at 25°C
C) A listing of metals in order of their density
D) A listing of metals in order of their hardness
Correct Answer: B) A listing of metals in order of reactivity (more or
less noble) in seawater at 25°C
Rationale: The galvanic series is a listing of metals and alloys in order of their
electrochemical reactivity in seawater (or other specific electrolytes). The
series ranks metals from more noble (cathodic) to less noble (anodic) .
,5. The general rules of galvanic corrosion are:
A) The more noble metal will corrode preferentially
B) The less noble (or more reactive) metal when connected to a more noble
metal will corrode preferentially
C) Both metals will corrode equally
D) Neither metal will corrode
Correct Answer: B) The less noble (or more reactive) metal when
connected to a more noble metal will corrode preferentially
Rationale: When dissimilar metals are connected in an electrolyte, the less
noble (more active) metal becomes the anode and corrodes preferentially.
The more noble metal becomes the cathode and is protected .
6. Galvanic corrosion occurs on which of the following substrates?
A) Concrete
B) Plastic
C) Metal
D) Wood
Correct Answer: C) Metal
Rationale: Galvanic corrosion occurs on metal substrates when dissimilar
metals are in electrical contact in the presence of an electrolyte. The less
noble metal corrodes preferentially .
7. The form of corrosion that has the largest potential for unexpected
catastrophic failure is:
A) General Corrosion
B) Galvanic Corrosion
C) Localized Corrosion (Pitting)
D) Atmospheric Corrosion
, *Correct Answer: C) Localized Corrosion (Pitting) *
Rationale: Pitting is the most detrimental form of corrosion attack and is
often responsible for failures of components in process plants, where it
accounts at least 90% of the metal damage by corrosion. It is considered
more dangerous than uniform corrosion because it is more difficult to detect,
predict and prevent .
8. Passivation can best be described as:
A) The removal of all surface contaminants
B) A protective metallic oxide surface layer that slows corrosion
C) The application of a protective coating
D) The process of removing rust from steel
Correct Answer: B) A protective metallic oxide surface layer that slows
corrosion
Rationale: Passivation is the formation of a protective metallic oxide surface
layer that slows corrosion. A common example is stainless steel, which forms
a chromium oxide layer that provides corrosion protection .
9. Relative humidity is:
A) The amount of water in the air in grams
B) A measure of the amount of moisture in the air compared to saturation
level
C) The temperature at which condensation occurs
D) The temperature of the air
Correct Answer: B) A measure of the amount of moisture in the air
compared to saturation level
Rationale: Relative humidity is a measure of the amount of moisture in the
air compared to saturation level. It is expressed as a percentage .
