https://quizlet.com/subject/NACE/page/4/
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.
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
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
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
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
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 OHc

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.
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
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
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 OHc

Acidic
A) is an excess of OHB) 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
b

pH
A) when alkali dissociate, anion
B) is an excess of OHC) 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)
D) is an ionized solution capable of conducting electricity.
E) is the negative logarithm to the base 10 of the hydrogen ion concentration or
pH = -log[H+]
e

Hydroxyl ion OHA) when alkali dissociate, anion
B) is an excess of OHC) 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)
D) is an ionized solution capable of conducting electricity.
E) is the negative logarithm to the base 10 of the hydrogen ion concentration or
pH = -log[H+]
a

Alkaline
A) when alkali dissociate, anion
B) is an excess of H+
C) 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)
D) is an ionized solution capable of conducting electricity.
E) is an excess of OHe

Amphoteric
A) 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)
B) 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)
C) are metals that corrode under low and high pH levels
D) is the division of chemistry that deals with the transfer of electric charge in
chemical reactions
E) is the deviation from the open circuit potential of an electrode resulting from the
passage of current
c

The pH of the environment around the cathode (the protected structure)
A) becomes more alkaline due to the production of hydroxyl ions or removal of
hydrogen ions during cathodic protection
B) is the deviation from the open circuit potential of an electrode resulting from the
passage of current
C) electrochemic
D) is an ionized solution capable of conducting electricity.
E) is the negative logarithm to the base 10 of the hydrogen ion concentration or
pH = -log[H+]
a

Electrochemistry
A) Is the term applied to the study of atom or molecular structures
B) is the gaining of one or more electrons
C) involves the movement of electrons anode to cathode for the reduction reaction
to occur
D) is the division of chemistry that deals with the transfer of electric charge in
chemical reactions
E) None of the above
d

Oxidation
A) Is the term applied to the study of atom or molecular structures
B) is the gaining of one or more electrons
C) involves the movement of electrons anode to cathode for the reduction reaction
to occur
D) is the division of chemistry that deals with the transfer of electric charge in
chemical reactions
E) 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)
e

Reduction
A) AMCE (anode, metallic path, cathode, electrolyte)
B) is an ionized solution capable of conducting electricity
C) is the loss of one or more electrons of an atom or molecule, which forms a
positive charged ion (occurs at the cathode)
D) 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)
E) is equal to the reciprocal of resistivity
d

Corrosion Cell
A) anode, metallic path, cathode, electrolyte
B) anode, cathode, electronic path, carbon
C) anode, electrolyte, carboneous fill, cathode
D) anode, cathode, oxygen, soil
E) anode, cathode, nitrogen, carbon
a

Electrolyte
A) AMCE (anode, metallic path, cathode, electrolyte)
B) is an ionized solution capable of conducting electricity
C) is the loss of one or more electrons of an atom or molecule, which forms a
positive charged ion (occurs at the cathode)
D) 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)
E) is equal to the reciprocal of resistivity
b

External circuit
A) is the anode
B) is the cathode
C) involves the movement of electrons anode to cathode for the reduction reaction
to occur
D) is the movement of ions (cations) away from the anode and toward the cathode
and ions (anions) moving toward the anode and away from the cathode
E) involves the movement of protons from the anode to the cathode for the
reduction reaction to occur
c

Electrolytic current flow
A) is the deviation from the open circuit potential of an electrode resulting from the
passage of current
B) is the movement of ions (anions) away from the anode and toward the cathode
and ions (cations) moving toward the anode and away from the cathode
C) is the movement of ions (cations) away from the anode and toward the cathode
and ions (anions) moving toward the anode and away from the cathode
D) voltage difference between the two points
E) accelerate corrosion of metal pipe in clay environments
c

Noble
A) is the anode
B) is the cathode
C) is the soil
D) is the oxygen
E) none of the above
b

Active
A) is the anode
B) is the cathode
C) is the soil
D) is the oxygen
E) none of the above
a

How Does the Current Flow
A) left to right
B) from the noble to the active through the metallic path and from the active to the
noble through the electrolyte
C) postive to negative
D) from the active to the noble through the electrolyte and from the noble to the
active metal through the metallic path
E) through the soil only
d

What causes the current to flow?
A) voltage similiarties between two points
B) current similiarties between two points
C) points of equal resistance
D) resistance differences between two points
E) voltage difference between the two points
e

Polarization
A) is equal to the reciprocal of resistivity
B) is the flow of charges along a conducting path and is
measured in amperes
C) is a relationship between the ratio of voltage and current to the resistance of a
circuit
D) is the deviation from the open circuit potential of an electrode resulting from the
passage of current
E) the association of like current
d

Conductivity
A) is equal to siemen/cm of the resistance
B) is the deviation from the open circuit potential of an electrode resulting from the
passage of current
C) is the movement of ions (anions) away from the anode and toward the cathode
and ions (cations) moving toward the anode and away from the cathode
D) is equal to the resistivity of the soil
E) is equal to the reciprocal of resistivity
e

Conductivity unit of measure
A) ions
B) siemen/cm
C) nobles/cm
D) ohms/cm
E) amps
b

PART OF WRITTEN EXAMINATION:
The more _____ the greater the conductivity?
A) resistance
B) oxygen
C) SRB
D) nitrogen
E) ions
e

metal in the vicinity of the higher concentration of oxygen will be more _____
A) active
B) noble
C) explosive
D) energetic
E) postively charged
b

PART OF WRITTEN EXAMINATION:
____ is a cathodic reactant
A) oxygen
B) amps
C) resistance
D) pH scale
a

SRB (sulfate reducing bacteria)
A) descrease the corrosion of metal pipe in clay environments
B) decrease the corrosion in all environments
C) accelerate corrosion of metal pipe in clay environments
c

Given an electrical circuit with a driving voltage of 12 Volts and a resistance of 10
Ohms, how much current does the circuit produce?
A) 1.2 Amperes
B) 1.5 Amperes
C) 2 Amperes
D) 0.2 Amperes
a

A corrosion circuit produces 2 Amperes of current at a driving voltage of 1.6 Volts,
what is the resistance of this circuit?
A) 1.8 Ohms
B) 2.8 Ohms
C) 0.8 Ohms
D) 9 Ohms
c

PART OF WRITTEN EXAMINATION:
Given: A 5 A/50 mV shunt has a voltage drop of 12 mV.
Find: What is the amount of current in this circuit?
A) 1.2 A
B) 0.2 A
C) 2.2A
D) none of the above
a

PART OF WRITTEN EXAMINATION:
Given: A 30 A/50 mV shunt has a voltage drop of 10 mV.
Find: What is the amount of current in this circuit?
A) 1.2A
B) 2.2A
C) 8A
D) 6A
E) 12A
d

200 millivolts =
A) 0.2 Volts
B) 20 millivots
C) 2 Volts
D) 200 Volts
a

0.03 Volts =
A) 3 microvolts
B) 30 millivots
C) 3 Volts
D) 300 Volts
E) 30 millivolts
b

1,000 Amperes =
A) 1000 kiloampere
B) 1000 kiloampere
C) 1000 milliampere
D) 1 kiloampere
E) 10 kilo ampere
d

0.5 amperes =
A) 50 milliamps
B) 500 milliamps
C) 5 milliamps
D) 5000 milliamps
b

0.7 megOhms =
A) 700,000 Ohms
B) 7,000 Ohms
C) 700 Ohms
D) 7,000,000 Ohms
a

Voltage (joule/coulomb), or potential
A) is a locomotive force
B) is a resistance force or a difference in current
C) is an electromotive force or a difference in potential
c

1,000 Volts =
A) 10 kilovolts
B) 100 kilovolts
C) 1 kilovolt
D) 100 millivolts
E) 1000 millivolts
c

1.000 Volts =
A) 1000 millivolts
B) 100 millivolts
C) 10 millivolts
D) 1 micrvolt
a

0.100 Volts =
A) 1000 millivolts
B) 100 millivolts
C) 10 millivolts
D) 1 micrvolt
b

0.010 Volt =
A) 1000 millivolts
B) 100 millivolts
C) 10 millivolts
D) 1 micrvolt
c

0.000001 Volt =
A) 1000 millivolts
B) 100 millivolts
C) 10 millivolts
D) 1 micrvolt
d

Current
A) is the flow of voltage along a conducting path and is mesured in volts
B) is the flow of charges along a conducting path and is
measured in amperes
b

1,000 amperes =
A) 1 kiloampere
B) 100 milliamperes
C) 1 milliampere
D) 10 milliamperes
E) 1 microampere
a

1.000 ampere =
A) 1 kiloampere
B) 100 milliamperes
C) 1 milliampere
D) 1000 milliamperes
E) 1 microampere
d

0.100 ampere =
A) 1 kiloampere
B) 100 milliamperes
C) 1 milliampere
D) 10 milliamperes
E) 1 microampere
b

0.010 ampere =
A) 1 kiloampere
B) 100 milliamperes
C) 1 milliampere
D) 10 milliamperes
E) 1 microampere
d

0.000001 ampere =
A) 1 kiloampere
B) 100 milliamperes
C) 1 milliampere
D) 10 milliamperes
E) 1 microampere
e

Resistance
A) is the resistance of a conductor of unit length and unit
cross-sectional area
B) is the opposition that charges encounter when moving
through a material
C) is a relationship between the ratio of voltage and current to the resistance of a
circuit
D) the sum of the source voltages around any
closed loop of a circuit is equal to the sum of the voltage drops across the
resistances in that loop
b

Resistivity
A) is the resistance of a conductor of unit length and unit
cross-sectional area
B) is the opposition that charges encounter when moving
through a material
C) is a relationship between the ratio of voltage and current to the resistance of a
circuit
D) the sum of the source voltages around any
closed loop of a circuit is equal to the sum of the voltage drops across the
resistances in that loop
a

Ohm's Law
A) is the resistance of a conductor of unit length and unit
cross-sectional area
B) is the opposition that charges encounter when moving
through a material
C) is a relationship between the ratio of voltage and current to the resistance of a
circuit
D) the sum of the source voltages around any
closed loop of a circuit is equal to the sum of the voltage drops across the
resistances in that loop
c

Power is measured in
A) amps
B) volts
C) ohms
D) siemens/cm
E) watts
e

Kirchhoff's Voltage Law
A) is the resistance of a conductor of unit length and unit
cross-sectional area
B) is the opposition that charges encounter when moving
through a material
C) is a relationship between the ratio of voltage and current to the resistance of a
circuit
D) the sum of the source voltages around any
closed loop of a circuit is equal to the sum of the voltage drops across the
resistances in that loop
d

Kirchhoff's Current Law
A) as much amps flows away from a point as
flows toward it
B) is the opposition that charges encounter when moving
through a material
C) is a relationship between the ratio of voltage and current to the resistance of a
circuit
D) the sum of the source voltages around any
closed loop of a circuit is equal to the sum of the voltage drops across the
resistances in that loop
E) as much volts flows away from a point as flows toward it
a

Impedance
A) The weight of any material deposited on the cathode (or liberated from the
anode) is directly proportional to the quantity of electric charge passing through the
circuit.
B) the total opposition that a circuit presents to
alternating current, similar to resistance in a direct current circuit
C) there is a voltage differential between two components of a system
b

PART OF WRITTEN EXAMINATION:
When current enters the meter on the positive terminal
A) a negative sign is displayed
B) a positive sign is displayed
C) depends
b

PART OF WRITTEN EXAMINATION:
When current enters the meter on the negative terminal
A) a negative sign is displayed
B) a positive sign is displayed
C) depends
a

PART OF WRITTEN EXAMINATION:
when using a digital meter, the reference electrode is
connected to
A) nothing
B) the positive side
C) depends
D) the negative terminal to obtain the proper polarity
reading.
d

Faraday's Law
A) The weight of any material deposited on the cathode (or liberated from the
anode) is directly proportional to the quantity of electric charge passing through the
circuit.
B) the total opposition that a circuit presents to
alternating current, similar to resistance in a direct current circuit
C) there is a voltage differential between two components of a system
a

Faraday's Law
A) K= IT =kg
B) Wt = VIT = kg
C) Wt = KIT = kg
D) Wt = V/IR =kg
c

PART OF WRITTEN EXAMINATION:
High conductivity
A) reduces the ability to support current flow
B) indicates an ability to support current flow
C) resistances the ability to support current flow
b

The higher the concentration of
hydrogen ions
A) the lower the pH
B) the lower the oxygen
C) the higher the pH
D) the higher the oxygen
a

copper
A) more active than hydrogen
B) more active than chloride
C) less active (or more noble) than hydrogen
D) less active (or more anodtic ) than hydrogen
c

In an acid environment
A) metals more active than
hydrogen will be corroded, and those more noble will not be corroded.
B) metals less active than
hydrogen will be corroded, and those less noble will not be corroded.
a

Highly alkaline environments
A) have a pH of 7
B) are generally with a pH lower than 4
C) are generally with a pH greater than 8
D) are generally with a pH greater than 10
E) are generally with a pH lower than 7
c

What type of metal is corrosive in an enviornment with a high alkaline environment?
a) symphoteric
b) copper
c) amphoteric
d) carbon
c

In the Galvanic Series which element is listed as the most active?
A) zinc
B) copper
C) steel
D) magnesium
E) carbon
d

In the Galvanic Series which element is listed as the most noble?
A) zinc
B) copper
C) steel
D) magnesium
E) carbon
e

Corrosion occurs when there is a _____ differential between two components of a
system
A) current
B) voltage
C) supply
D) pH
E) carbon
b

PART OF WRITTEN EXAMINATION:
Breaks in the coating of the pipe are called
A) vacations
B) holidays
C) naps
D) tours
b

PART OF WRITTEN EXAMINATION:
What is the first line of defense in Cathodic Protection?
A) impressed current systems
B) grounding rods
C) coating of the pipe
D) holidays
E) carbon
c

Magnesium nomianl corrosion potential
A) -1.10V
B) -1.05v
C) 1.75 to 1.55V
D) -1.75 to -1.55V
E) -0.2 to -0.5V
d

Zinc nomianl corrosion potential
A) -1.10V
B) -1.05v
C) 1.75 to 1.55V
D) -1.75 to -1.55V
E) -0.2 to -0.5V
a

Aluminum nomianl corrosion potential
A) -1.10V
B) -1.05v
C) 1.75 to 1.55V
D) -1.75 to -1.55V
E) -0.2 to -0.5V
b

PART OF WRITTEN EXAMINATION:
Anode efficiency
A) the ratio of metal consumed producing useful anodtic protection current to the
total metal consumed
B) the ratio of metal consumed producing useful cathodic protection current to the
total metal consumed
C) the ratio of metal isolated producing useful cathodic protection current to the
total metal consumed
b

General anode efficiency rating of magnesium?
A) 20%
B) 60%
C) 80%
D) 90%
E) 50%
e

General anode efficiency rating of zinc?
A) 20%
B) 60%
C) 80%
D) 90%
E) 50%
d

General anode efficiency rating of aluminum?
A) 90%
B) 60%
C) 80%
D) 70%
E) 50%
a

The name for the material used to surround anodes in their bed?
A) Chloride
B) Sulfate
C) Chemical Backfill
D) acidic compounds
c

Impressed current uses external power to force current to flow from the anode to
the structure through ______
A) metallic path
B) air
C) the electrolyte
D) backfill
E) ions
c

What type of CP would you use on a bare or poorly coated structure?
A) Impressed Current Cathodic Protection
B) Galavanic System
a

Graphite anodes perform well in what type of soil?
A) wet
B) seawater area
C) relatively dry soil
c

PART OF WRITTEN EXAMINATION:
What type of anode was developed primarly for use in seawater?
A) Graphite
B) carbon
C) platinum
D) aluminum
E) mixed metal oxide
c

What type of anode is used primarily in unheated water storage tanks?
A) Graphite
B) carbon
C) platinum
D) aluminum
E) mixed metal oxide
d

What type of anode is highly resistant to acid attack even at a pH less than one?
A) Graphite
B) carbon
C) platinum
D) aluminum
E) mixed metal oxide
e

PART OF WRITTEN EXAMINATION:
What is unquie about constant potential rectifiers?
A) the current stays the same while voltage changes
B) the current and voltage output vary
C) the voltage stays the same while current changes
D) the current switches between AC and DC
b

PART OF WRITTEN EXAMINATION:
A well-coated structure is defined as
A) 95% or better
B) 90% or better
C) 99% or better
D) 93% or better
c

What is a special concern in deep anode beds?
A) flow of the current upstream
B) blockage of backfill due to tight soils
C) pH scale
D) blockage of gas due to tight soils such as clay and silt at the anodes
d

PART OF WRITTEN EXAMINATION:
Corrosion rates tend to _____ with temperature
A) increase
B) decrease
C) stay the same
a

PART OF WRITTEN EXAMINATION:
As oxygen levels increase, polarization tends to ____
A) decrease
B) increase
C) stay the same
a

PART OF WRITTEN EXAMINATION:
All the voltage drops in the cathodic protection circuit are controllable except for the
one through the ____
A) metallic path
B) anode
C) cathode
D) electrolyte
E) backfill
d

PART OF WRITTEN EXAMINATION:
One method to reduce IR drops through the electrolyte
A) monthly checkups
B) place a reference electrode near the structure
C) galanavic anodes
D) change different types of reference electrodes frequently
b

PART OF WRITTEN EXAMINATION:
Code for Control of External Corrosion on Underground or Submerged Metallic Piping
Systems
A) RP0285
B) SP0169
C) SP0176
D) SP0290
E) SP0388
b

PART OF WRITTEN EXAMINATION:
Code for Corrosion Control of Underground Storage Tank Systems by Cathodic
Protection
A) RP0285
B) SP0169
C) SP0176
D) SP0290
E) SP0388
a

PART OF WRITTEN EXAMINATION:
SP0169 criteria
A) -850mV with CP applied in respect to CSE
-Negative polarized potential of at least 850mV to CSE (instant off)
-Minimum of 100mV of cathodic polarization
B) -750mV with CP applied in respect to CSE
-Negative polarized potential of at least 750mV to CSE (instant off)
-Minimum of 50mV of cathodic polarization
C) -850mV with CP applied in respect to CSE
-Negative polarized potential of at least 1200 mV to CSE (instant off)
-Minimum of 100mV of cathodic polarization
a

PART OF WRITTEN EXAMINATION:
Corrosion Control of Steel Fixed Offshore Platforms
Associated with Petroleum
A) RP0285
B) SP0169
C) SP0176
D) SP0290
E) SP0388
c

PART OF WRITTEN EXAMINATION:
Impressed Current Cathodic Protection of Internal
Submerged Surfaces of Steel Water Storage Tanks
A) RP0285
B) SP0169
C) SP0176
D) SP0290
E) SP0388
e

PART OF WRITTEN EXAMINATION:
External Cathodic Protection of On-Grade Metallic
Storage Tank Bottoms
A) RP0193
B) SP0169
C) SP0176
D) SP0290
E) SP0388
a

PART OF WRITTEN EXAMINATION:
Impressed Current Cathodic Protection of Reinforcing
Steel in Atmospherically Exposed Concrete Structures
A) RP0285
B) SP0290
C) SP0176
D) SP0220
E) SP0388
b

How to ensure recitifer is safe to touch
A) touch it
B) measure the AC input in the back
C) open the structure to check the meters
D) measure a case-to-ground voltage or use an instrument that detects AC voltage
d

What must be done with the rectifier before the entire rectifier can be safe to work
on?
A) measure the AC input in the back
B) DC disconnect must be OFF
C) AC disconnect must be OFF
D) fuse out of circuit board
c

Required by code what must be done before installing an interrupter in a rectifer?
A) measure the AC input in the back
B) DC disconnect must be OFF
C) AC disconnect must be OFF
D) fuse out of circuit board
E) lock out and tag out of break or AC disconnect
e

With the rectifier breaker OFF
A) The system is safe and not dangerous
B) AC line voltage still exists up to the circuit breaker and is dangerous
C) AC line voltage does not exist and is safe
b

Mitigation of Alternating Current and Lightning
Effects on Metallic Structures and Corrosion Control Systems
A) RP0285
B) SP0290
C) SP0177
D) SP0220
E) SP0388
c

PART OF WRITTEN EXAMINATION:
The most common Portable Reference Electrode used on land not near seawater?
A) SSC
B) SCE
C) SHE
D) CSE
E) PGP
d

PART OF WRITTEN EXAMINATION:
Portable Reference Electrode used for measurements in seawater?
A) SCE
B) SHE
C) PGP
D) GPG
E) SSC
e

To maintain a portable reference electrode once should clean it with?
A) a knife
B) wool brush
C) sand blaster
D) cloth
E) steel brush
d

Close Interval Potential Survies involve
A) a structure-to-structure potential measurement
B) a structure-t0-electrolyte potential measurement
C) a electrolyte-to electrolyte potential measurement
b

PART OF WRITTEN EXAMINATION:
For a pipe-to-soil potential profile over the structure the voltmeter is plugged in
A) with positive to the pipe, and positive to the electrolyte
B) with negative to the pipe, and positive to the electrolyte
C) with positive to the pipe , and negative to the electrolyte
D) with negative to the pipe, and negative to the electrolyte
c

PART OF WRITTEN EXAMINATION:
To measure the direction of current with a voltmeter
A) two reference electrodes are attached to the positive and passed out over the
electrolyte
B) two reference electrodes are attached to the negative and passed out over the
electrolyte
C) a reference electrode is attached to the positive and another is attached to the
negative and passed out over the electrolyte
c

PART OF WRITTEN EXAMINATION:
A ____ is used to record information while taking the surveys
A) key logger
B) trojan
C) phase inverter
D) data logger
E) Oscope
d

Ammeters must be connected in _____ with the circuit
A) parrellel
B) series
C) vertical
D) hortizontal
b

PART OF WRITTEN EXAMINATION:
If an ammeter is connected into an external circuit such that external current flow
goes into the positive terminal of the meter
A) then the display is negative
B) then the display is positive
C) not enough information
D) unknown current modulates
b

With a current shunt, the current is obtained by measuring _____ across the current
shunt and calculating using Ohm's Law
A) current
B) ohms
C) pH scale
D) voltage
d

PART OF WRITTEN EXAMINATION:
If a current shunt is rated as 15A/50Mv and has a voltage drop of 28mV what is the
current flowing through the shunt?
A) 8.0A
B) 8.4A
C) 6A
D) 2.5A
b

True or False ( t or f )
Diodes cannot be properly checked while in the circuit or with power on.
t

What determines the depth of the measurement in the Wenner Four-Pin Method?
A) off centerness of the outside rods to the inside rods which can be any distance
apart
B) the spacing of all rods evenly
C) the spacing of the inner rods offset to the outer rods
D) inputed into the instrument by the operator manually
b

When using the Wenner Four-Pin Method the average soil resistivity is the function
of
A) the voltage drop between the center pair of pins with current flowing between
the two outside pins
B) the current drop between the center pair of pins with voltage flowing between
the two outside pins
C) the resistance in ohms of the inner pins to the outside pins
a

In relation to line locators conductive is
A) a direct connection with the pipe and transmitter
B) an indirect connection with radio waves
a

In relation to line locators inductive is
A) a direct connection with the pipe and transmitter
B) an indirect connection with radio waves
b

What are often used to check the effectives of CP and are made of the same metal
as the structure they are electrically connected to?
A) half cells
B) line locators
C) coupons
D) current interrupters
E) full cells
c

_____ defined as current flowing on a structure that is not part of the intended
electrical circuit
A) stray current
B) bypass current
C) Bonding
D) backfill
a

vary in magnitude and often in direction. These currents can be manmade or
natural in origin
A) telluric currents
B) dynmaic stray currents
C) steady state stray currents
b

PART OF WRITTEN EXAMINATION:
are naturally-occurring dynamic stray currents that
are caused by disturbances in the earth's magnetic field by sun spot activity.
A) telluric currents
B) dynmaic stray currents
C) steady state stray currents
a

PART OF WRITTEN EXAMINATION:
maintain a constant magnitude and direction
A) telluric currents
B) dynmaic stray currents
C) steady state stray currents
c

PART OF WRITTEN EXAMINATION:
A stray current coming from a HVDC would be an example of
A) telluric currents
B) dynmaic stray currents
C) steady state stray currents
c

PART OF WRITTEN EXAMINATION:
also called drain bonds or cables, provide a
metallic path between the affected structure and the source of stray current
A) telluric bonds
B) dynmaic bonds
C) mitigation bonds
D) coupon bonds
E) elecyrolyte bonds
c

largest charge for carbon steel pressure pipe with exothermic welding
A) 10 grams
B) 20 grams
C) 45 grams
D) 15 grams
E) 30 grams
d

PART OF WRITTEN EXAMINATION:
Distance between the pipe and the anodes must be
A) within the area of influence
B) in a remote distance
C) close as possible
b

PART OF WRITTEN EXAMINATION:
Deep anode installati ons are those where the anodes are installed vertically at a
nominal depth of _____ or more below the earth's surface in a drilled hole
A) 20 ft
b) 25 ft
c) 50ft
d) 15 ft
c

PART OF WRITTEN EXAMINATION:
Anode beds are usually filled with what substance?
A) coke breeze
B) sawdust
C) earth
D) steel
a

THIS IS PART OF YOUR PRAC APP Station #12:
What is the total metal lost from steel with a current discharge of 2 Amperes for 16
months?
A) 25.6kg
B) 22.206kg
C) 24.206kg
D) 12kg
E) 32kg
b

THIS IS PART OF YOUR PRAC APP:
Convert -75mVsce to Zinc
A) 955mVzn
B) 855mVzn
C) 1025mVzn
D) 900mVzn
E) 855mVzn
a

THIS IS PART OF YOUR PRAC APP:
Given 5.9V and 3.02amps for a rectifier.
If the present voltage output of the rectifier doubles, with all else being equal,
calculate current output
A) 5.0A
B) 6.04A
C) 3.02A
D) not enough info
E) 5.9A
b

THIS IS PART OF YOUR PRAC APP:
Given 5.9V and 3.02amps for a rectifier.
If the present rectifier voltage output remains constant, calculate current output if
the circuit resistance of the cathodic protection system doubles
A) 5.0A
B) 6.04A
C)1.5A
D) 3.2A
E) 2.2A
c

THIS IS PART OF YOUR PRAC APP:
While performing a diode check on a diode with a multimeter and the meters reads
" OL " while testing both sides of the diode, the diode is
A) function properly
B) Open Circuit
C) Short Circuit
b

THIS IS PART OF YOUR PRAC APP:
While performing a diode check on a diode with a multimeter and the meters reads
"0.00" while testing both sides of the diode, the diode is
A) function properly
B) Open Circuit
C) Short Circuit
c

Metallic shorts to a structure with CP will normally result in:
A) lower circuit resistance, lower current output and an increase in protection
B) higher circuit resistance, lower current output and an increase in protection
C) lower circuit resistance, higher current output and a decrease in protection
D) higher circuit resistance, higher current output and a decrease in protection
c

When servicing a rectifier which of the following practices should be followed?
I test the case for voltage
II listen for unusual noises
III look for discoloration and vent obstructions
IV Smell for unusual odors
A I only
B I and II only
C II and III only
D I, II, III, and IV
E I and IV only
d

The following trouble in an impressed current system would give a normal DC
voltage and zero (0) current output
A Faulty transformer
B Broken cable to the anodes
C No AC supply
D Faulty rectifying elements
b

Routine monitoring of a cathodic protection system usually does NOT include:
A moisture content around the anodes
B structure-to-electrolyte potentials
C rectifier voltage and current output
D interference control bond current
a

A galvanic anode that would NOT be used to provide CP to steel is:
A Magnesium
B Aluminum
C Zinc
D Chromium