NACE (National Association of Corrosion Engineers) CP2 Exam Manual / Test Bank / Question Bank
NACE 2008 Student Manual!
START OF CHAPTER 1
Corrosion is an electrochemical process involving
- flow of protons and electrons
- flow of neutrons and ions
- flow of protons and ions
- flow of electrons and ions
- flow of resistance and resistivity
Correct Answer:
d
Metal loss or corrosion occurs at the
- cathode
- anode
- electronic path
- metallic path
Correct Answer:
b
What are the four parts of the corrosion cell
- anode, resistor, electrolyte, metallic path
- anode, cathode, electron, electronic path
- anode, cathode, electrolyte, metallic path
Correct Answer:
c
- / 4
True or False (t or f):
Ions exist only in the electrolyte?
Correct Answer:
t
Electrons flow in a corrosion cell by which of the following paths?
- anode to cathode via electrolyte
- cathode to anode via electronic path
- anode to cathode via electronic path
Correct Answer:
c
At the cathodic surface in a corrosion cell, the electrons from the ____ meet ____ ions from the solution.
- cathode, hydrogen
- cathode, OH-
- anode, hydrogen
- anode, OH-
Correct Answer:
c
Oxidation of the metal occurs at the ____ surfaces and reduction of ____ ions occurs at the ____.
- anodic, hydrogen, cathodes
- cathode, OH-, anodic
- anodic, OH-, cathodes
- cathode, anodic, electrolyte
- cathode, hydrogen, electrolyte
Correct Answer:
a
True or false 2 / 4
Is oxidation necessarily associated with oxygen?
Correct Answer:
f
_____ is the measure of the electrochemical difference between two electrodes in an electrolyte
- current
- resistance
- error
- ohms
- ohms-cm
- voltage
Correct Answer:
f
The ________ represents the reversible work to move a unit charge from the electrode surface through the solution to the reference electrode
- current potential
- electrode potential
- resistance potential
- ohms potential
- Faraday potential
Correct Answer:
b
Metals occur in nature in the form of various chemical compounds referred to as ___
- ores
- anodic metals
- cathodic metals
- carbohydrates
Correct Answer: 3 / 4
a
The amount of energy required by a metal during the refining process determines the ___ or _______ of the metal.
- current, active state
- voltage, active state
- active resistance, voltage
- resistance, active state
- current, active resistance
Correct Answer:
b
During the refining stage of metal the ____ the energy, the more ____ the metal and the more tendency it has to corrode.
- higher, inactive
- lower, active
- higher, active
- lower, inactive
Correct Answer:
c
What is the most common iron ore?
- hemophite
- hematite
- magnesium
- calcium
- aluminum
Correct Answer:
b
True or false
- / 4