NACE (National Association of Corrosion Engineers) CP1 Tester Exam. Do Tests (Written and Start with Term)

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 OH-

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.

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 OH-

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

b

pH

A) when alkali dissociate, anion

B) is an excess of OH-

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 the negative logarithm to the base 10 of the hydrogen ion concentration or

pH = -log[H+]

e

Hydroxyl ion OH-

A) when alkali dissociate, anion

B) is an excess of OH-

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 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 OH-

e

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 Conventional Current Flow

A) left to right

B) from the active to the noble through the metallic path; from the noble to the active through the electrolyte

C) positive to negative

D) from the noble to the active through the metallic path; from the active to the noble through the electrolyte

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