NACE CP2 PRACTICE EXAMINATION 2026 QUESTIONS WITH ANSWERS GRADED A+

NACE CP2 PRACTICE EXAMINATION
2026 QUESTIONS WITH ANSWERS
GRADED A+

◍ factors affecting corrosion.
Answer: A. anything that affects polarization. (temp. etc...)B. concentration
cells (oxygen, temp, etc.) In an oxygen concentration cell, what is the
anode? (i.e. the area with more or less oxygen?) In a metal ion cell, which
area is the anode (i.e. the area with the greater of lower concentration of
metal ions)?C. Anaerobic bacteria (MIC) Absence of oxygen, depolarizer
◍ amphoteric materials. Name some examples.
Answer: corrode at low and high pH. Aluminum, Zinc, Lead, Tin, and
beryllium
◍ rate of corrosion is directly proportional to?.
Answer: directly proportional to current flow
◍ NACE 2008 Student Manual!START OF CHAPTER 1Corrosion is an
electrochemical process involvingA) flow of protons and electrons B) flow
of neutrons and ionsC) flow of protons and ionsD) flow of electrons and
ionsE) flow of resistance and resistivity.
Answer: d
◍ a corrosion cell can form under which of the following conditions?a. a
difference in temperature where the higher temperature is the cathode.b. a
difference in oxygen where the highest concentration of oxygen is at the
anode.c. a difference in metals where the anode is at the most noble metal.d.
a difference in salt concentration where the anode is at the highest ion
concentration.
Answer: d. a difference in salt concentration where the anode is at the

, highest ion concentration
◍ a galvanic anode system is NOT normally suitable in which of the following
conditions?a. when a small amount of current is required.b. in high soil
resisitivityc. for localized protectiond. for interference mitigation..
Answer: b. in high soil resistivity
◍ Metal loss or corrosion occurs at the A) cathodeB) anodeC) electronic
pathD) metallic path.
Answer: b
◍ 0.32 / OLOV / OVOL / OL.
Answer: Good diodeShorted diodeOpen Diode
◍ What are the four parts of the corrosion cellA) anode, resistor, electrolyte,
metallic pathB) anode, cathode, electron, electronic pathC) anode, cathode,
electrolyte, metallic path.
Answer: c
◍ True or False (t or f):Ions exist only in the electrolyte?.
Answer: t
◍ Electrons flow in a corrosion cell by which of the following paths?A) anode
to cathode via electrolyteB) cathode to anode via electronic pathC) anode to
cathode via electronic path.
Answer: c
◍ Consequences of Electrolytic couple.
Answer: Without CP, corrosion may occur inside casing.
◍ Electronic short.
Answer: Pipe electrically shielded inside casing and does not receive
CPCasing adds to the current required for CP
◍ At the cathodic surface in a corrosion cell, the electrons from the ____ meet
____ ions from the solution.A) cathode, hydrogenB) cathode, OH-C) anode,
hydrogenD) anode, OH-.
Answer: c

,◍ Oxidation of the metal occurs at the ____surfaces and reduction of ____
ions occurs at the ____.A) anodic, hydrogen, cathodesB) cathode, OH-,
anodicC) anodic, OH-, cathodesD) cathode, anodic, electrolyteE) cathode,
hydrogen, electrolyte.
Answer: a
◍ True or falseIs oxidation necessarily associated with oxygen?.
Answer: f
◍ Current flow in a corrosion cell flows which path:A) anode to metallic path
to cathodeB) anode to electronic path to cathodeC) cathode to metallic to
anodeD) cathode to electrolyte to anodeE) anode to electrolyte to
cathodeVoltage is the measure of the electrochemical difference between
two electrodesin an electrolyte.
Answer: e
◍ _____ is the measure of the electrochemical difference between two
electrodesin an electrolyteA) currentB) resistanceC) errorD) ohmsE)
ohms-cmF) voltage.
Answer: f
◍ The ________represents the reversible work to move a unit charge from the
electrode surfacethrough the solution to the reference electrodeA) current
potentialB) electrode potentialC) resistance potentialD) ohms potentialE)
Faraday potential.
Answer: b
◍ Metals occur in nature in the form of various chemical compounds referred
to as___A) oresB) anodic metalsC) cathodic metalsD) carbohydrates.
Answer: a
◍ The amount of energy required by a metal during the refiningprocess
determines the ___ or _______ of the metal.A) current, active stateB)
voltage, active stateC) active resistance, voltageD) resistance, active stateE)
current, active resistance.
Answer: b

, ◍ During the refining stage of metal the ____ the energy, the more ____the
metal and the more tendency it has to corrode.A) higher, inactiveB) lower,
activeC) higher, activeD) lower, inactive.
Answer: c
◍ What is the most common iron ore?A) hemophiteB) hematiteC)
magnesiumD) calciumE) aluminum.
Answer: b
◍ True or falseIron is considered thermodynamically unstable?.
Answer: t
◍ True or falseGold is more noble than zinc?.
Answer: t
◍ Which of the following metals is most active?A) magnesiumB) copperC)
ironD) nickelE) platinum.
Answer: a
◍ Electromotive force (emf), is ____ in sign and magnitude to the electrode
potential of the ___ less the electrode potential of the ____.A) unequal,
cathode, anodeB) unequal, anode, cathodeC) equal, cathode, anodeD) equal,
anode, cathode.
Answer: d
◍ The driving force for electrochemical corrosion is ____A) currentB) voltage
C) resistanceD) ohmsE) siemens-cm.
Answer: b
◍ In relation to a corrosion cell, ____ is the net transfer of electric charge per
unit timeA) currentB) voltage C) resistanceD) ohmsE) siemens-cm.
Answer: a
◍ If a metallic path connects two electrodes inside an electrolyte, the ____
difference will cause a____ to flow between themA) current, voltageB)
resistance, currentC) resistance, voltageD) voltage, currentE) current,
resistance.