NACE CP2 ACTUAL EXAM PAPER 2026
QUESTIONS WITH ANSWERS GRADED
A+
◍ A mitigation control bond should be designed to1. carry the necessary
current2. restrict the current to that required to mitigate the problem3. keep
the current going in one direction if necessary4. return the potential on the
interfered with structure to its pre-interference state.
Answer: All of the above
◍ oxidation.
Answer: loss of electrons, positive charge atoms (anode)
◍ A mitigation bond may cause more problems under which of the following
conditions?1. Where the interfering structure bond point is more
electropositive than the interfered with structure2. Where the interfering
structure bond point is more more electronegative than the interfered with
structure3. Where there are more than one, or changing, current discharge
points4. Where the interfering structure bond point potential varies from
being more electronegative to more electropositive than the interfered with
structure.
Answer: 1, 3 and 41. Where the interfering structure bond point is more
electropositive than the interfered with structure3. Where there are more
than one, or changing, current discharge points4. Where the interfering
structure bond point potential varies from being more electronegative to
more electropositive than the interfered with structure
◍ On a cathodically protected pipeline, AC corrosion can be expected at which
current densities?1. 30 mA/m22. 10 A/m23. 110 A/m24. 200 A/m2.
Answer: 3 and 4
,◍ reduction.
Answer: gain of electrons, negative charged atoms (cathode)
◍ A close interval potential survey is a test where structure-to-electrolyte
potentials are measured
A. at 1 to 5 meter spacing along a pipeline
B. at 1 to 3 kilometer spacing along a pipeline
C. at the quarter points around a large tank
D. close to the DC power source.
Answer: A. At 1 to 5 meter spacing along pipeline
◍ forms of corrosion.
Answer: uniform, crevice, galvanic (dissimilar metals) if two metals have to
be couple then best to couple metals close together in the galvanic series,
pitting, intergranular, selective leaching (dezincification, graphitization),
velocity phenomena, environmental cracking (corrosion fatigue, hydrogen
embrittlement, SCC (Carbonates/bicarbonates)
◍ The AC voltage-to-ground on a section of pipeline paralleling AND
crossing a power line tends to be highest1. where the power line and
pipeline cross2. point where the power line and pipeline separate3. at the
ends of the pipeline4. evenly along the pipeline.
Answer: 1, 2 and 31. where the power line and pipeline cross2. point where
the power line and pipeline separate3. at the ends of the pipeline
◍ Methods of lowering hazardous AC voltages includes installing which of the
following?1. Grounds at the discontinuities between power line and
pipeline2. A bond to the steel power line tower3. A gradient mat or a grid
around aboveground structures4. A remote ground away from the parallel
section.
Answer: 1 and 31. Grounds at the discontinuities between power line and
pipeline3. A gradient mat or a grid around aboveground structures
◍ High PH.
Answer: Low hydrogen, alkaline, easy polarization
, ◍ A polarization cell is used to
A. polarize the pipeline
B. polarize the electrical ground
C. provide DC coupling but block AC
D. provide AC coupling but block DC.
Answer: D. provide AC coupling but block DC
◍ Tests for interference can be indicated by which of the following?1.
Structure-to-electrolyte potential changes2. Changes in line current
magnitude or direction3. Localized pitting in areas near or immediately
adjacent to a foreign structure4. Breakdown of protective coatings in a
localized area.
Answer: All of the above
◍ When AC voltage of 13 VAC is measured on a pipeline, what course of
action should be taken?1. Wait until next year and take an AC voltage to
confirm it has not changed2. Contact the power company to determine what
percent of load the power line is operating3. Advise other personnel that a
near hazardous situation exists on the pipeline4. Advise the owner or
supervisor that an AC mitigation programs should be investigated.
Answer: 2, 3 and 42. Contact the power company to determine what percent
of load the power line is operating3. Advise other personnel that a near
hazardous situation exists on the pipeline4. Advise the owner or supervisor
that an AC mitigation programs should be investigated
◍ Low PH.
Answer: high hydrogen, acidic, harder to polarize
◍ High oxygen/High Hydrogen concentration.
Answer: harder to polarize, work at the cathode only, called cathodic
depolarizers.
◍ The purpose of a gradient mat is to
A. electrically ground the pipe to the earth to eliminate the AC voltage
B. bring the voltage difference between the pipe and the earth close to 0
VAC
QUESTIONS WITH ANSWERS GRADED
A+
◍ A mitigation control bond should be designed to1. carry the necessary
current2. restrict the current to that required to mitigate the problem3. keep
the current going in one direction if necessary4. return the potential on the
interfered with structure to its pre-interference state.
Answer: All of the above
◍ oxidation.
Answer: loss of electrons, positive charge atoms (anode)
◍ A mitigation bond may cause more problems under which of the following
conditions?1. Where the interfering structure bond point is more
electropositive than the interfered with structure2. Where the interfering
structure bond point is more more electronegative than the interfered with
structure3. Where there are more than one, or changing, current discharge
points4. Where the interfering structure bond point potential varies from
being more electronegative to more electropositive than the interfered with
structure.
Answer: 1, 3 and 41. Where the interfering structure bond point is more
electropositive than the interfered with structure3. Where there are more
than one, or changing, current discharge points4. Where the interfering
structure bond point potential varies from being more electronegative to
more electropositive than the interfered with structure
◍ On a cathodically protected pipeline, AC corrosion can be expected at which
current densities?1. 30 mA/m22. 10 A/m23. 110 A/m24. 200 A/m2.
Answer: 3 and 4
,◍ reduction.
Answer: gain of electrons, negative charged atoms (cathode)
◍ A close interval potential survey is a test where structure-to-electrolyte
potentials are measured
A. at 1 to 5 meter spacing along a pipeline
B. at 1 to 3 kilometer spacing along a pipeline
C. at the quarter points around a large tank
D. close to the DC power source.
Answer: A. At 1 to 5 meter spacing along pipeline
◍ forms of corrosion.
Answer: uniform, crevice, galvanic (dissimilar metals) if two metals have to
be couple then best to couple metals close together in the galvanic series,
pitting, intergranular, selective leaching (dezincification, graphitization),
velocity phenomena, environmental cracking (corrosion fatigue, hydrogen
embrittlement, SCC (Carbonates/bicarbonates)
◍ The AC voltage-to-ground on a section of pipeline paralleling AND
crossing a power line tends to be highest1. where the power line and
pipeline cross2. point where the power line and pipeline separate3. at the
ends of the pipeline4. evenly along the pipeline.
Answer: 1, 2 and 31. where the power line and pipeline cross2. point where
the power line and pipeline separate3. at the ends of the pipeline
◍ Methods of lowering hazardous AC voltages includes installing which of the
following?1. Grounds at the discontinuities between power line and
pipeline2. A bond to the steel power line tower3. A gradient mat or a grid
around aboveground structures4. A remote ground away from the parallel
section.
Answer: 1 and 31. Grounds at the discontinuities between power line and
pipeline3. A gradient mat or a grid around aboveground structures
◍ High PH.
Answer: Low hydrogen, alkaline, easy polarization
, ◍ A polarization cell is used to
A. polarize the pipeline
B. polarize the electrical ground
C. provide DC coupling but block AC
D. provide AC coupling but block DC.
Answer: D. provide AC coupling but block DC
◍ Tests for interference can be indicated by which of the following?1.
Structure-to-electrolyte potential changes2. Changes in line current
magnitude or direction3. Localized pitting in areas near or immediately
adjacent to a foreign structure4. Breakdown of protective coatings in a
localized area.
Answer: All of the above
◍ When AC voltage of 13 VAC is measured on a pipeline, what course of
action should be taken?1. Wait until next year and take an AC voltage to
confirm it has not changed2. Contact the power company to determine what
percent of load the power line is operating3. Advise other personnel that a
near hazardous situation exists on the pipeline4. Advise the owner or
supervisor that an AC mitigation programs should be investigated.
Answer: 2, 3 and 42. Contact the power company to determine what percent
of load the power line is operating3. Advise other personnel that a near
hazardous situation exists on the pipeline4. Advise the owner or supervisor
that an AC mitigation programs should be investigated
◍ Low PH.
Answer: high hydrogen, acidic, harder to polarize
◍ High oxygen/High Hydrogen concentration.
Answer: harder to polarize, work at the cathode only, called cathodic
depolarizers.
◍ The purpose of a gradient mat is to
A. electrically ground the pipe to the earth to eliminate the AC voltage
B. bring the voltage difference between the pipe and the earth close to 0
VAC
