NACE (National Association of
Corrosion Engineers) CP1 Tester Exam
Questions and Complete Solutions
Graded A+
Corrosion
A) is defined by NACE International as the deterioration of a material, usually a metal that results from a
reaction with its environment.
B) is produced when acids dissociate , when cation takes place
C) is the division of chemistry that deals with the transfer of electric charge in chemical reactions
D) involves the movement of electrons anode to cathode for the reduction reaction to occur
E) is equal to the reciprocal of resistivity. - Answer: a
Atoms
A) are positively charged particles in the nucleus
B) are neutral particles in the nucleus
C) are electrically charged atoms
D) consist of a nucleus and orbiting electrons, the number of protons equals the number of negatively
charged electrons
E) are ions formed by the gaining of electrons and is negatively charged because the number of
electrons is greater than the number of protons - Answer: d
Protons
A) are positively charged particles in the nucleus
B) are neutral particles in the nucleus
C) are electrically charged atoms
,D) consist of a nucleus and orbiting electrons, the number of protons equals the number of negatively
charged electrons
E) are ions formed by the gaining of electrons and is negatively charged because the number of
electrons is greater than the number of protons - Answer: a
Neutrons
A) are positively charged particles in the nucleus
B) are neutral particles in the nucleus
C) are electrically charged atoms
D) consist of a nucleus and orbiting electrons, the number of protons equals the number of negatively
charged electrons
E) are ions formed by the gaining of electrons and is negatively charged because the number of
electrons is greater than the number of protons - Answer: b
PART OF WRITTEN EXAMINATION:
Ions
A) are positively charged particles in the nucleus
B) are neutral particles in the nucleus
C) are electrically charged atoms
D) consist of a nucleus and orbiting electrons, the number of protons equals the number of negatively
charged electrons
E) are ions formed by the gaining of electrons and is negatively charged because the number of
electrons is greater than the number of protons - Answer: c
PART OF WRITTEN EXAMINATION:
Anions
A) are composed of two or more atoms, molecules are the smallest unit of a substance with the same
specific chemical properties of that substance
,B) are metals that corrode under low and high pH levels
C) are ions formed by the gaining of electrons and is negatively charged because the number of
electrons is greater than the number of protons
D) accelerate corrosion of metal pipe in clay environments
E) is an excess of OH- - Answer: c
PART OF WRITTEN EXAMINATION:
Cation
A) are composed of two or more atoms, molecules are the smallest unit of a substance with the same
specific chemical properties of that substance
B) loss of electrons yielding a positively charged ion
C) is the negative logarithm to the base 10 of the hydrogen ion concentration or
pH = -log[H+]
D) are metals that corrode under low and high pH levels
E) is an ionized solution capable of conducting electricity. - Answer: b
Molecules
A) is produced when acids dissociate , when cation takes place
B) is the term applied to the loss of one or more electrons from an atom or molecule, which forms a
positively charged ion, the atom or molecule decreases in negative charge (occurs at the anode)
C) are composed of two or more atoms, molecules are the smallest unit of a substance with the same
specific chemical properties of that substance
D) is the deviation from the open circuit potential of an electrode resulting from the passage of current
E) consist of a nucleus and orbiting electrons, the number of protons equals the number of negatively
charged electrons - Answer: c
Chemical bonding
, A) is the force that holds atoms of molecules together
B) is the division of chemistry that deals with the transfer of electric charge in chemical reactions
C) is the gain of one or more electrons to an atom or molecule, which then forms a negatively charged
ion or neutral element (occurs at the cathode)
D) are particles that carry a negative charge
E) the ratio of metal consumed producing useful cathodic protection current to the total metal
consumed - Answer: a
Hydrogen ion H+
A)is the force that holds atoms of molecules together
B) are ions formed by the gaining of electrons and is negatively charged because the number of
electrons is greater than the number of protons
C) is produced when acids dissociate , when cation takes place
D) is an excess of H+ ions
E) is an excess of OH- - Answer: c
Acidic
A) is an excess of OH-
B) is an excess of H+ ions
C) when alkali dissociate, anion
D) is the division of chemistry that deals with the transfer of electric charge in chemical reactions
E) loss of electrons yielding a positively charged ion - Answer: b
pH
A) when alkali dissociate, anion
B) is an excess of OH-
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