NACE EXAM LATEST 2024-2025 ACTUAL EXAM 500 QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
||COMPLETE A+ GUIDE
1. START OF CHAPTER 1 f f f
Corrosion is an electrochemical process involving
f f f f f
A) flow of protons and electrons
f f f f
B) flow of neutrons and ions
f f f f
C) flow of protons and ions
f f f f
D) flow of electrons and ions
f f f f
E) flow of resistance and resistivity
f f f f f
Ans >> d
f f
2. Metal loss or corrosion occurs at the
f f f f f f
A) cathode
B) anode
C) electronic path f
D) metallic path f f
Ans >> b
f f
3. What are the four parts of the corrosion cell
f f f f f f f f
A) anode, resistor, electrolyte, metallic path
f f f f
B) anode, cathode, electron, electronic path
f f f f
1 f/ f100
,2|Page
C) anode, cathode, electrolyte, metallic path
f f f f
Ans >> c f ff
4. True or False (t or f)
f f f f f
Ions exist only in the electrolyte?
f f f f f f
Ans>>tf f
5. Electrons flow in a corrosion cell by which of the following paths?
f f f f f f f f f f f
A) anode to cathode via electrolyte
f f f f
B) cathode to anode via electronic path f f f f f
C) anode to cathode via electronic path
f f f f f
Ans >> c f f
6. At the cathodic surface in a corrosion cell, the electrons from the
f f f f f f f f f f f ff
f meet ions from the solution. f f f
A) cathode, hydrogen f
B) cathode, OH- f
C) anode, hydrogen f
D) anode, OH-: f f
Ans >> c f f
7. Oxidation of the metal occurs at the f f f f f f ff
surfaces and reduction of f f f ions occurs at the
f f f .
2 f/ f100
,3|Page
A) anodic, hydrogen, cathodes f f
B) cathode, OH-, anodic f f
C) anodic, OH-, cathodes f f
D) cathode, anodic, electrolyte f f
E) cathode, hydrogen, electrolyte f f
Ans >> a f f
8. True or false f f
Is oxidation necessarily associated with oxygen?
f f f f f
Ans>> f f ff
9. Current flow in a corrosion cell flows which path:
f f f f f f f f
A) anode to metallic path to cathode f f f f f
B) anode to electronic path to cathode
f f f f f
C) cathode to metallic to anode f f f f
D) cathode to electrolyte to anode f f f f
E) anode to electrolyte to cathode
f f f f
Voltage is the measure of the electrochemical difference between two elec-
f f f f f f f f f f
trodes in an electrolyte
f f f f
Ans>> e f ff
10. f is the measure of the electrochemical difference between two
f f f f f f f f
electrodes
f
3 f/ f100
, 4|Page
in an electrolyte
f f
A) current
B) resistance
C) error
D) ohms
E) ohms-cm
F) voltage
Ans >> ff ff
11. The ff
represents the reversible work to move a unit charge from the electrode
f f f f f f f f f f f
surface through the solution to the reference electrode
f f f f f f f f
A) current potential f
B) electrode potential f
C) resistance potential f
D) ohms potential f
E) Faraday potential f
Ans >> b
f f f
4 f/ f100
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