NACE CP1 Tester Practice Exam

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• The portion of the metal that is corroding is called the:
• Which reaction occurs at the anode?
• How is current direction measured using a voltmeter?
• What does the movement of ions toward the cathode involve?
• What does 'close interval potential survey' help assess?
• What is the total resistance of a series circuit with resistances of 1 Ohm, 2 Ohms, and 10 Ohms?
• Breaks in the coating of the pipe are referred to as what?
• In an impressed current system, the rectifier positive terminal is connected to:
• Which of the following is used to assess the voltage of a structure relative to surrounding soil?
• Close Interval Potential Surveys involve which type of measurement?
• In galvanic corrosion, which factor primarily influences the rate of corrosion?
• What does a failure in the cable to the anodes represent in a cathodic protection system?
• How does the presence of sulfate reducing bacteria affect metal corrosion?
• What current would pass through a circuit with a total resistance of 10 Ohms and a voltage of 60V?
• How many millivolts are there in 1.000 Volts?
• Given a total current (I total) of 6 and a total resistance (R total) of 3.33, what is I1 if V1 is 8V?
• What will be displayed when current enters the positive terminal of a meter?
• What does SP0290 primarily govern?
• What defines an anion?
• What is the significance of resistance differences in an electrochemical context?
• Resistance to current flow is lowest for:
• In relation to line locators, what does conductive mean?
• In electrical circuits, what does impedance refer to?
• Which Portable Reference Electrode is commonly used on land away from seawater?
• What type of ions are formed when atoms lose electrons?
• What is a special concern in deep anode beds?
• What is the largest charge for carbon steel pressure pipe with exothermic welding?
• What material is used to surround anodes in their bed?
• Compared to magnesium anodes, zinc anodes tend to have a:
• In the galvanic series, the more active metals:
• What does a cation represent in terms of electrical charge?
• When comparing series and parallel circuits, which scenario typically results in higher current?
• Which path do electrons take in a corrosion cell?
• What does Kirchhoff's Current Law state about current flow at a junction?
• Which type of current does not flow through the intended circuit?
• Under what condition is galvanic corrosion most likely to occur?
• What happens to the conductivity of a material as temperature increases for most metals?
• A stray current from a high voltage direct current line is an example of which type of stray current?
• Which code pertains to the Control of External Corrosion on Underground or Submerged Metallic Piping Systems?
• What is the unit of measurement for resistivity?
• What do atoms consist of?
• Sulfate reducing bacteria (SRB) have which effect on metal pipes in clay environments?
• Using Ohm's Law, what is the current if resistance is 5 Ohms and voltage is 25V?
• What does high conductivity indicate in a circuit?
• In terms of electrochemical cells, polarization primarily affects what?
• Above which value is a structure AC voltage-to-ground considered hazardous?
• What basic principle does Kirchoff's Law highlight regarding current at a junction?
• The main disadvantage of using magnesium anodes is:
• When current enters the negative terminal of a meter, what is displayed?
• In comparing copper to hydrogen, how is copper characterized?
• What defines cathodic protection?
• What does anode efficiency measure?
• If an ammeter displays a positive reading, what does this indicate about the current flow?
• What is the general anode efficiency rating of zinc?
• How is current measured across a current shunt?
• What is the pH characteristic of highly alkaline environments?
• What is the minimum cathodic polarization requirement according to SP0169?
• How does the current flow in an electrolytic system?
• What does the term 'stray current' refer to in corrosion measurement?
• Graphite anodes perform well in what type of soil?
• The average soil resistivity in the Wenner Four-Pin Method is a function of?
• What happens to positively charged ions during an anodic process?
• In a corrosion cell, electrons flow in the direction of:
• In a corrosion cell, the function of the electrolyte is to:
• What is typically a sign of galvanic corrosion?
• If a resistance of 3.5 Ohms was measured using the 4-pin Wenner method with a pin spacing of 2 meters, what is the resistivity?
• If an electrolyte potential of -0.850 Volts to CSE is measured, which conversion to another electrode is correct?
• What is the relationship between resistance and conductivity?
• When servicing a rectifier, which of the following practices should be followed?
• Which of the following best describes the concept of corrosion?
• What is defined as current flowing on a structure that is not part of the intended electrical circuit?
• With the rectifier breaker OFF, what condition exists regarding AC line voltage?
• What is the current in a circuit with a 30 A/50 mV shunt and a voltage drop of 10 mV?
• What does 'active' refer to in electrochemical terms?
• Which of the following is an effect of high resistance in a circuit?
• A small anode and a large cathode configuration is considered:
• What is the result of cation formation?
• In a circuit with a 12 Volt driving voltage and 10 Ohms of resistance, how much current is produced?
• A voltage of 0.02 Volts across a shunt indicates which of the following currents?
• What can excessive polarization in a cathodic protection system lead to?
• 0.010 ampere is equivalent to how many milliamperes?
• What is the conversion of -75mVsce to Zinc?
• What is a primary function of a current shunt?
• What happens to the pH of the environment around the cathode during cathodic protection?
• In electrical terms, power is measured in:
• What does current refer to in electrical terms?
• What is the value of 200 millivolts in volts?
• What is true about electrical current?
• If the resistance of 0.17 Ohms is measured across a conductive material, what is the resistivity given a diameter of 10cm and a length of 1 meter?
• What is the equivalent of 1,000 amperes?
• A conductor's resistance is an example of:
• What does a hydroxyl ion (OH-) represent in chemical terms?
• What is a characteristic of an electrochemical corrosion cell when polarization increases?
• Which substance is a cathodic reactant?
• In a series circuit, how is the total resistance determined?
• Which type of anode is highly resistant to acid attack even at a pH less than one?
• Impressed current uses external power to force current to flow from the anode to the structure through which medium?
• What defines oxidation in chemical reactions?
• Which of the following factors affects corrosion rates the most?
• Approaching the rectifier case one should first:
• What is the nominal corrosion potential of zinc?
• Compared to an impressed current system, a galvanic anode system in soil has the following advantage:
• If the total voltage (V total) is 30V and I total is 0.03A, how much current is I3 if all currents are equal?
• Which of the following processes results in the formation of an anode?
• In a corrosion cell, which of the following is NOT required:
• A well-coated structure is defined as what percentage or better?
• How is the cathodic protection of reinforcing steel in atmospherically exposed concrete structures primarily achieved?
• Which process is responsible for the acceleration of corrosion in metal pipes?
• Which type of metal is considered corrosive in a highly alkaline environment?
• What occurs during the process of oxidation?
• Ohm's Law relates the following:
• What would the resistance of a superconductor be?
• What does a higher circuit resistance typically lead to in a cathodic protection system?
• What principle does Ohm's Law describe?
• What type of chemical reaction occurs during the process of oxidation?
• What does polarization refer to in electrochemistry?
• How is -1.0 volts CSE converted to an Ag/AgCI reference electrode?
• What is the code for external cathodic protection of on-grade metallic storage tank bottoms?
• Which Portable Reference Electrode is most suitable for measurements in seawater?
• What is the role of a voltage tap in a CP system?
• What is the first line of defense in Cathodic Protection?
• What does -150 mV SCE convert to in terms of CSE reference electrode?
• Corrosion rates tend to behave how with changing temperature?
• What is one method to reduce IR drops through the electrolyte?
• The reduction reaction that occurs in an electrochemical reaction:
• Which is a more active metal?
• What type of current is influenced by temperature variations and changes in resistivity?
• Given a voltage of 12 volts and a resistance of 10 Ohms, what is the current flowing through the circuit?
• What is the required negative polarized potential with cathodic protection applied, according to SP0169?
• If a current shunt is rated 15A/50mV and has a voltage drop of 28mV, what is the current flowing through the shunt?
• In a parallel electrical circuit, which statement is correct regarding voltage?
• In a series circuit with three resistors, how does the total voltage relate to the individual voltages across each resistor?
• What is true about the current in a series electrical circuit?
• When electrons are lost from an atom, which process occurs?
• What is chemical bonding?
• What is the definition of corrosion according to NACE International?
• What happens during the process of dissociation in acids?
• According to Kirchoff's Laws, what is true about the voltages in a circuit?
• What does Kirchhoff's Voltage Law state?
• Which of the following is a standard conversion for a voltage of 100 mV SCE to CSE?
• Galvanic anodes are usually preferred in situations where:
• What is the general anode efficiency rating of aluminum?
• What occurs at the cathode in an electrochemical cell?
• How is pH mathematically defined?
• What does a molecule consist of?
• Anode beds are typically filled with which substance?
• A constant voltage rectifier is normally adjusted by changing:
• Ammeters should be connected in what configuration within a circuit?
• When the CP current is interrupted, the difference in potential with current applied and the instant off potential is called:
• What are often used to check the effectiveness of CP and made of the same metal as the structure they are connected to?
• What is the unit of measure for conductivity?
• Which property is primarily observed when measuring voltage in a circuit?
• What is the voltage across a resistance of 1 Ohm with a current of 100mA?
• Which variable is likely to change when adjusting a cathodic protection system?
• What determines the effectiveness of an anode in corrosion protection?
• What process is considered the movement of electrons from anode to cathode?
• Deep anode installations are installed at a nominal depth of what minimum below the earth's surface?
• What is 0.100 ampere equal to in milliamperes?
• What best describes the external circuit in an electrochemical cell?
• In corrosion readings, what is a major influencing factor for the accuracy of measurements?
• Which statement best defines electrolytic current flow?
• What does Faraday's Law state regarding deposition in a circuit?
• What is the primary role of an anode in electrochemistry?
• What is essential for ensuring accuracy in measurements with line locators?
• Can diodes be properly checked while in the circuit or with power on?
• Which method would indicate a properly functioning diode during a multimeter test?
• Which component is typically absent in a constant voltage CP rectifier?
• What results from increasing the concentration of ions in a solution?
• In a series circuit, which property remains constant across all components?
• Which galvanic anode would NOT be effective in providing cathodic protection to steel?
• What is produced when a cation occurs?
• Which standard is applicable for corrosion control of steel fixed offshore platforms associated with petroleum?
• How many Ohms are in 0.7 MegaOhms?
• Which element listed in the Galvanic Series is the most active?
• What is the effect of a higher concentration of hydrogen ions on pH?
• In a galvanic anode installation, what happens to the buried bare wire between the structure and the anode?
• Watts are used to measure:
• What type of cathodic protection would you use on a bare or poorly coated structure?
• What factor is crucial for effective corrosion control systems?
• What does the term "ohms-cm" specifically represent?
• What is a common unit of measurement for electrical resistance?
• What is the effect of increased resistance on current flow?
• For effective measurement, what resistance level is preferred for a multimeter?
• What material is highly effective as an anode in many cathodic protection systems?
• True or False: Another name for the metallic path is the electronic path.
• What type of anode was primarily developed for use in seawater?
• What would be the consequence of having high resistance in an ammeter?
• What is characteristic of the voltage in a parallel circuit?
• What is 0.5 Amperes equivalent to in milliamps?
• Which of the following is true about amphoteric substances?
• What is the purpose of a Portable Reference Electrode?
• In a cathodic protection system, what does the term "anode" refer to?
• What is the resistance of a circuit producing 2 Amperes of current at a driving voltage of 1.6 Volts?
• What components are involved in a corrosion cell?
• When converting between measurement standards, what is a common conversion factor for mV SCE to mV CAS?
• What is unique about constant potential rectifiers?
• What effect do metallic shorts have on a cathodic protection system?
• What currents vary in magnitude and often in direction and can be manmade or natural in origin?
• In an acid environment, which metals will be corroded according to their activity compared to hydrogen?
• What are naturally-occurring dynamic stray currents caused by?
• What is the main benefit of using aluminum anodes compared to other materials?
• All the voltage drops in the cathodic protection circuit are controllable except for the one through the:
• Which type of stray current maintains a constant magnitude and direction?
• What type of resistance is preferred for an ammeter to function properly?
• The quantity of polarization is determined by:
• The weight of material deposited on the cathode is what in relation to the current flow?
• What does a multimeter reading of "0.00" indicate when testing both sides of a diode?
• In electrochemistry, what does 'noble' refer to?
• Which of the following is equivalent to 0.03 Volts?
• What are ions?
• If the present voltage output of a rectifier doubles while all else remains constant, what is the new current output?
• Which particles in the nucleus are neutral?
• Conventional current is in the direction of:
• What is the measured value used to calculate resistivity using the Wenner 4-pin method?
• Which method is frequently employed for measuring soil resistivity?
• What term describes the flow of current through unintended paths in electrical systems?
• What is an electrolyte?
• What defines an acidic solution in chemical terms?
• If R total equals 2.857 ohms and I total equals 7A, what is V1 given I1 equals 2A?
• What is the recommended distance between the pipe and the anodes in a grounding system?
• True or False: Ions exist only in the electrolyte.
• What does a multimeter reading of "OL" indicate when checking a diode?
• What is the nominal corrosion potential for aluminum?
• Which of the following will likely reduce the current requirement for CP?
• What is the equivalent of 1,000 Amperes in kiloamperes?
• What is the equivalent of 0.100 Volts in millivolts?
• What is the result of a closed circuit in electrochemistry?
• How do electrolytic solutions typically affect electric current?
• Compared to zinc anodes, magnesium anodes in high resistivity soil will:
• What application does SP0176 specifically pertain to?
• What is electrochemistry primarily concerned with?
• What charge do protons carry?
• What is 0.010 Volt equivalent to in millivolts?
• Which of the following can affect the measurements taken in the Wenner Four-Pin Method?
• Resistivity is defined as:
• Which particles are involved in the reduction reaction at the cathode?
• What is the total metal loss from steel with a current discharge of 2 Amperes over a period of 16 months?
• What is the nominal corrosion potential of magnesium?
• What determines the depth of measurement in the Wenner Four-Pin Method?
• What is the equivalent of 1,000 Volts in kilovolts?
• Which type of stray current results from chemical reactions in electrochemical processes?
• In electrical terminology, the acronym 'CP' commonly refers to what?
• According to Faraday's Law, what does Wt = KIT = kg represent?
• What is the purpose of mitigation bonds in electrical systems?
• What is the driving voltage if a circuit produces 2 Amperes of current at 10 Ohms resistance?
• What is the primary characteristic of molecules?
• What precaution should be taken before working on a rectifier?
• What voltage requirement does SP0176 specify for cathodic protection?
• What is the effect on a rectifier's current output if the voltage remains constant and the circuit resistance increases?
• Which rectifier-related activity requires a specific AC disconnect action for safety?
• What scientific law supports the relationship between electric charge and weight of deposited material on electrodes?
• Which code is primarily associated with corrosion control of underground storage tank systems by cathodic protection?
• What is the process of reduction associated with?
• In relation to line locators, what does inductive mean?
• In a parallel circuit, which property remains constant across all components?
• Resistance is measured in which unit?
• Corrosion occurs when there is a _____ differential between two components of a system.
• What does voltage (joule/coulomb) represent in electrical terms?
• What provides a metallic path between an affected structure and the source of stray current?
• Which parameter is vital for assessing the performance of a cathodic protection system?
• In an impressed current system, to which terminal are the anodes connected?
• What device is typically used to record data while taking surveys?
• For voltage measurement in a pipe-to-soil potential profile, the voltmeter should be connected how?
• Which equipment is critical for measuring stray currents?
• What type of anode is used primarily in unheated water storage tanks?
• How many milliamperes are in 1.000 ampere?
• How many millivolts are in 0.000001 Volt?
• Which aspect must be checked to ensure the rectifier is safe to touch?
• The purpose of cathodic protection is to:
• What characterizes an alkaline solution?
• As oxygen levels increase, polarization tends to do what?
• Given a 5 A/50 mV shunt with a voltage drop of 12 mV, what is the current in the circuit?
• The criterion of -850mV is referenced to which electrode?
• What would the total current be if the voltage across a 10 ohm resistor is 80V?
• What could cause an impressed current system to show normal DC voltage but zero current output?
• In a digital meter, the reference electrode is connected to which terminal to obtain the proper polarity reading?
• A metal in the vicinity of higher concentration of oxygen will be more _____.