NACE (National Association of Corrosion Engineers) CP2 EXAM
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1. NACE 2008 Student Manual! d
START OF CHAPTER 1
Corrosion is an electrochemical process involving
A) flow of protons and electrons
B) flow of neutrons and ions
C) flow of protons and ions
D) flow of electrons and ions
E) flow of resistance and resistivity
2. Metal loss or corrosion occurs at the b
A) cathode
B) anode
C) electronic path
D) metallic path
3. What are the four parts of the corrosion cell c
A) anode, resistor, electrolyte, metallic path
B) anode, cathode, electron, electronic path
C) anode, cathode, electrolyte, metallic path
4. True or False (t or f): t
Ions exist only in the electrolyte?
5. Electrons flow in a corrosion cell by which of the c
following paths?
A) anode to cathode via electrolyte
B) cathode to anode via electronic path
C) anode to cathode via electronic path
6. At the cathodic surface in a corrosion cell, the elec- c
trons from the ____ meet ____ ions from the solution.
A) cathode, hydrogen
B) cathode, OH-
, NACE (National Association of Corrosion Engineers) CP2 EXAM
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C) anode, hydrogen
D) anode, OH-
7. Oxidation of the metal occurs at the ____ a
surfaces and reduction of ____ ions occurs at the
____.
A) anodic, hydrogen, cathodes
B) cathode, OH-, anodic
C) anodic, OH-, cathodes
D) cathode, anodic, electrolyte
E) cathode, hydrogen, electrolyte
8. True or false f
Is oxidation necessarily associated with oxygen?
9. _____ is the measure of the electrochemical differ- f
ence between two electrodes
in an electrolyte
A) current
B) resistance
C) error
D) ohms
E) ohms-cm
F) voltage
10. The ________ b
represents the reversible work to move a unit charge
from the electrode surface
through the solution to the reference electrode
A) current potential
B) electrode potential
C) resistance potential
D) ohms potential
E) Faraday potential
11. a
, NACE (National Association of Corrosion Engineers) CP2 EXAM
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Metals occur in nature in the form of various chemical
compounds referred to as
___
A) ores
B) anodic metals
C) cathodic metals
D) carbohydrates
12. The amount of energy required by a metal during the b
refining
process determines the ___ or _______ of the metal.
A) current, active state
B) voltage, active state
C) active resistance, voltage
D) resistance, active state
E) current, active resistance
13. During the refining stage of metal the ____ the energy, c
the more ____
the metal and the more tendency it has to corrode.
A) higher, inactive
B) lower, active
C) higher, active
D) lower, inactive
14. What is the most common iron ore? b
A) hemophite
B) hematite
C) magnesium
D) calcium
E) aluminum
15. True or false t
Iron is considered thermodynamically unstable?
, NACE (National Association of Corrosion Engineers) CP2 EXAM
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16. True or false t
Gold is more noble than zinc?
17. Which of the following metals is most active? a
A) magnesium
B) copper
C) iron
D) nickel
E) platinum
18. Electromotive force (emf), is ____ in sign and mag- d
nitude to the electrode potential of the ___ less the
electrode potential of the ____.
A) unequal, cathode, anode
B) unequal, anode, cathode
C) equal, cathode, anode
D) equal, anode, cathode
19. The driving force for electrochemical corrosion is b
____
A) current
B) voltage
C) resistance
D) ohms
E) siemens-cm
20. In relation to a corrosion cell, ____ is the net transfer a
of electric charge per unit time
A) current
B) voltage
C) resistance
D) ohms
E) siemens-cm
21. d
