NACE CP2 LATEST 2026 TEST PAPER QUESTIONS AND
SOLUTIONS RATED A+
✔✔if lead, copper, steel, and aluminum are connected together in water, which will
corrode the most? - ✔✔aluminum
✔✔in a galvanic anode system, the driving voltage is due to the
a. electrolyte itself
b.anode to structure couple in the electrolyte
c.connection to the structure
d. anode backfill - ✔✔anode to structure couple in the electrolyte
✔✔which is NOT a primary reaction at the anode?
a. metal oxidation
b. oxygen evolution
c.chloride evolution
d. hydrogen evolution - ✔✔d. hydrogen evolution
✔✔which of the following will decrease cathodic protection current requirements?
a. increased pH
b. increased oxygen
c. increased temperature
d. increased agitation - ✔✔a. increased pH
✔✔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 resisitivity
c.for localized protection
d.for interference mitigation. - ✔✔b. in high soil resistivity
✔✔The purpose of the galvanic anode backfill is NOT to
a. prevent passivation of the anode
b. create uniform corrosion of the anode
c. passivate the anode
d.provide a low resistivity environment around the anode. - ✔✔c. passivate the anode
✔✔the elements of a galvanic cathodic protection system in soil includes which of the
following?
, i. active material
ii. noble structure
iii. carbon backfill
iv. wiring - ✔✔I, II, and IV only
✔✔an impressed current system is NOT normally practical under which of the following
conditions
a. with very small current requirements
b. for protection of poorly coated and bare structures
c. in high soil resistivity
d. inside water storage tanks - ✔✔a. with very small current requirements
✔✔Rectifier components could include which of the following?
I. Transformer
II. Photovaltaic cells
III. thermopile
IV. silicon diodes - ✔✔I and IV only
✔✔Which of the following DC power supplies are commonly used to charge batteries
that in turn provide cathodic protection current?
I. thermoelectric genorators
II. solar
III. wind-driven generator
IV. saturable reactor - ✔✔II and III only
✔✔A transformer will
A. change AC to DC
B. increase the DC voltage only
C. decrease the ac voltage only
D. increase or decrease the AC supply voltage - ✔✔D. increase or decrease the AC
supply voltage
✔✔If the primary AC voltage is 100 Volts AC, and there are 100 primary windings with
200 secondary windings, what is the the secondary voltage?
A. 25 volts AC
B. 50 Volts AC
c. 100 volts AC
d. 200 Volts AC - ✔✔d. 200 Volts AC
SOLUTIONS RATED A+
✔✔if lead, copper, steel, and aluminum are connected together in water, which will
corrode the most? - ✔✔aluminum
✔✔in a galvanic anode system, the driving voltage is due to the
a. electrolyte itself
b.anode to structure couple in the electrolyte
c.connection to the structure
d. anode backfill - ✔✔anode to structure couple in the electrolyte
✔✔which is NOT a primary reaction at the anode?
a. metal oxidation
b. oxygen evolution
c.chloride evolution
d. hydrogen evolution - ✔✔d. hydrogen evolution
✔✔which of the following will decrease cathodic protection current requirements?
a. increased pH
b. increased oxygen
c. increased temperature
d. increased agitation - ✔✔a. increased pH
✔✔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 resisitivity
c.for localized protection
d.for interference mitigation. - ✔✔b. in high soil resistivity
✔✔The purpose of the galvanic anode backfill is NOT to
a. prevent passivation of the anode
b. create uniform corrosion of the anode
c. passivate the anode
d.provide a low resistivity environment around the anode. - ✔✔c. passivate the anode
✔✔the elements of a galvanic cathodic protection system in soil includes which of the
following?
, i. active material
ii. noble structure
iii. carbon backfill
iv. wiring - ✔✔I, II, and IV only
✔✔an impressed current system is NOT normally practical under which of the following
conditions
a. with very small current requirements
b. for protection of poorly coated and bare structures
c. in high soil resistivity
d. inside water storage tanks - ✔✔a. with very small current requirements
✔✔Rectifier components could include which of the following?
I. Transformer
II. Photovaltaic cells
III. thermopile
IV. silicon diodes - ✔✔I and IV only
✔✔Which of the following DC power supplies are commonly used to charge batteries
that in turn provide cathodic protection current?
I. thermoelectric genorators
II. solar
III. wind-driven generator
IV. saturable reactor - ✔✔II and III only
✔✔A transformer will
A. change AC to DC
B. increase the DC voltage only
C. decrease the ac voltage only
D. increase or decrease the AC supply voltage - ✔✔D. increase or decrease the AC
supply voltage
✔✔If the primary AC voltage is 100 Volts AC, and there are 100 primary windings with
200 secondary windings, what is the the secondary voltage?
A. 25 volts AC
B. 50 Volts AC
c. 100 volts AC
d. 200 Volts AC - ✔✔d. 200 Volts AC
