NACE CP2 - EXAM LATEST VERSION 500
QUESTIONS AND CORRECT ANSWERS
GUARANTEED A+ AT FIRST ATTEMPT
___ is used to protect the rectifier from lightning
- Filters
- Surge protection
- Interrupters
- Remote Monitoring
- Warning Devices and Signal Lights - Correct Answerb
____ anodes are used for coated structures where only holidays in the coating are protected by the CP system and for structures that are electrically isolated from other structures.
- remote
- distributed
- area of influence
- gradient area - Correct Answera
____ are used to alert personnel to operating malfunctions of the unit
- Filters
- Surge protection
- Interrupters
- Remote Monitoring
- Warning Devices and Signal Lights - Correct Answere
____ are used to improve efficiency and for noise interference control in the rectifiers
- fuses
- resistors
- transformers
- filters
- diodes - Correct Answerd
____ cells are responsible for much of the corrosion that take place in soils, particularly in bare or poorly coated pipe
- concentration
- steady state
- carbon
- dynamic 1 / 4
- telluric - Correct Answera
____ is a method for detecting cathodic protection current pickup at coating holidays
- DCVG survey
- Pearson survey
- coating resistance survey
- pipeline current mapper - Correct Answera
____ is the ____ of resistance
- Conductance, reciprocal
- Inductance, reciprocal - Correct Answera
____ movement results in a ____ in polarization and a(n) _____ in current
- decreased, decrease, decrease
- decreased, increase, decrease
- increased, increase, decrease
- increased, decrease, decrease
- increased, increase, increase - Correct Answerd
____ uses a long term way of recording stray current magnitude over time
- rectifier timer
- Stripe Anode
- current interrupter
- strip chart recorder - Correct Answerd
_____ anodes are used in soils, flowing seawater, mud, and are practically immune to chlorine attack
- Magnesium
- Zinc
- Galvalum
- Aluminum
- Graphite
- High-Silicon Chromium-Bearing Cast Iron - Correct Answere
_____ are available that will monitor corrosion rate directly without being removed from the environment
- coupons
- resistance probes
- RMU - Correct Answerb 2 / 4
_____ are the potentials of the cathode and anode when the corrosion current is zero
- mixed potentials
- corrosion potentials
- corrosion current potentials
- open circuit potentials - Correct Answerd
_____ can be added to anode backfill to lower resistivity
- sodium lithium
- chloride sulfate
- sodium sulfate
- chloride calcium - Correct Answerc
_____ currents are naturally occurring stray currents that are caused by disturbances in the Earth's magnetic field by sun spot activity
- Telluric
- Steady State
- Dynamic - Correct Answera
_____ diodes consist of a wafer sliced from a pure single crystal of ____
- silicon
- selenium - Correct Answer
_____ in temperature has a depolarizing effect
- increase
- decrease - Correct Answera
_____ is the measure of the electrochemical difference between two electrodes in an electrolyte
- current
- resistance
- error
- ohms
- ohms-cm
- voltage - Correct Answerf
_____ is where AC power is transmitted to ground then flows on and off the underground structure.
- / 4
- electrostatic coupling
- Resistive coupling
- Electromagnetic induction - Correct Answerb
_____ is where the structure acts as one side of a capacitor with respect to ground, only corncern when the structure is _____
- electrostatic coupling ,abovegrade
- Resistive coupling, below ground
- Electromagnetic induction, below ground - Correct Answera
_____ provides protection to the rectifier components from current surges or overload
- circuit breaker
- fuses
- panels
- shunt - Correct Answera
_____ rectification can be achieved with ___ diodes in a ___ tap configuration
- half-wave, four, center
- full-wave, four, center
- half-wave, two, center
- full-wave, two, center - Correct Answerd
_____ stacks can tolerate current overloads up to ten times rated capacity for a few minutes
- silicon
- selenium - Correct Answerb
_____ stray currents are those currents that vary in amplitude and/or change in the direction of current flow
- Telluric
- Steady State
- Dynamic - Correct Answerc
______ allows us to relate the corrosion lost to the amount of current discharged
- Faraday's Law
- Ohm's Law
- Kirchoff's Law - Correct Answera
- / 4