NACE CIP 2 Exam Test Questions and Answers Rated A
Passivation is the formation of a protective oxide Film on
Describe passivation the surface reducing its chemical activity and its ability to
corrode
Oxygen: oxygen increases the rate of corrosion tempera-
ture
Temperature: corrosion usually accelerated with increas-
ing temperature
Describe the following factors and how they attect corro-
Chemical salts: increase the rate of corrosion by increasing
sion
the eflciency of the electrolyte
humidity: the wetter the environment, the more corrosion
is likely to occur pollutants and acid gases: all promote
corrosion
Two broad categories of corrosion can be described as General and localized
Galvanic corrosion is an electrochemical action of two
dissimilar metals in the presence of an electrolyte and an
Describe galvanic corrosion
electron conductive path, Which occurs when the dissim-
ilar metals come into contact
Cathodic protection is the reduction or elimination of cor-
rosion by making the structure to be protected a cathode
Describe cathodic protection
by means of impressed current or attachment to a galvanic
anode
The two primary types of cathodic protection are Impressed current and galvanic (sacrificial)
1. Generators 2. Fuel cells 3. Wind powered cells 4. Ther-
impressed current power sources include: moelectric cells 5. Rectified commercial power 6. Solar
Cells
The separation of the coating from the surface through hy-
Describe cathodic disbondment droxyl formation due to increased ( made more negative
) potential.
, Dehumidification is the process of removing moisture va-
Describe dehumidification
por from the air to lower its dew point
Must be large enough to contain the whole work area.
Not be larger than the performance capabilities of the
dehumidification equipment.
When planning enclosures the following minimum re- Be sturdy enough to hold up to intended work activities,
quirements should be considered potential loads, and a possible inclement weather.
Have minimal leakage to maintain proper environmental
conditions and ensure the dehumidification system oper-
ates eflciently.
The air turnover principal illuminates air stratification, or
layering, in large open spaces by recirculating the hot air
Describe air turns (air changes) that becomes trapped in the higher spaces.
The number of times it does this per hour is called air
turns.
At & below what relative humidity does corrosion virtually
40%
cease
Describe two ways to reduce the relative humidity of the Increase the surface temperature and reduce moisture
boundary layer content by dehumidification
Types of dehumidification equipment include Refrigeration and desiccant
Dries the air. Lowers the dew point. Permits blasting the
entire surface. Holds the blast with dry air. Helps in clean-
Describe several benefits of dehumidification
ing the surface. Holds the surface during coating applica-
tion.
Relative humidity, air temperature, and dewpoint temper-
Electronic hygrometers can be used to determine
ature.
Advanced environmental testing instruments have the
ability to store data that can be transferred to a computer USB, IR, Bluetooth
and other devices. Transfer methods include
Some general basic centrifugal blast set ups include
, Tumbling mill, multitable, plain table, swing table, custom
designed systems
Centrifugal blasting conveyor systems are commonly used
Plate, rolled structural shapes, large trusses, girders
for cleaning
Ship decks, hull sides, and bottoms. Storage tanks. Con-
Portable centrifugal blasting systems can be used on
crete floors. Highways and bridge decks.
Centrifugal abrasive throwing wheel, the blast cabinet,
Generally centrifugal blast systems are composed of the in fixed systems some type of material handling system,
following elements abrasive recycling system, a dust collector and vent pipe
system, abrasives.
Abrasive operating mix, size of the abrasive, velocity of the
The eflciency of the centrifugal blast wheels depends on
abrasive coming ott the wheel, quantity and direction of
several factors
the thrown abrasive, condition of the feed parts.
Little amperage readings on a centrifugal blasting ma-
An abrasive starved wheel, a flooded or choked wheel
chine could signify
To control the sizing of the abrasive mix, to remove sand,
The functions of the centrifugal blasting machine separa-
spent abrasives, rust, dirt, and any other contaminants
tor include
from the abrasive stream, to control abrasive consumption
Provide consistency of the finish, ensure uniform abrasive
A well balanced operating mix (working mix) of abrasives coverage, ensure conditioning of the abrasive for opti-
will mum cleaning, minimize lowest abrasive and machine
part where and reduce downtime for maintenance
Monitor the dust collector, monitor the amperage of the
wheel motors / low amperage, Monitor the handling in
Some of the inspection concerns during centrifugal blast-
the loading of the conveyor line for contaminants and
ing include
possible discontinuities in the steel, monitor the speed of
wine, inspect the steel as it leaves the production line
The WJ-1 (visual cleanliness) is comparable to which abra-
ISO SA 3
sive blast cleaning standard
Passivation is the formation of a protective oxide Film on
Describe passivation the surface reducing its chemical activity and its ability to
corrode
Oxygen: oxygen increases the rate of corrosion tempera-
ture
Temperature: corrosion usually accelerated with increas-
ing temperature
Describe the following factors and how they attect corro-
Chemical salts: increase the rate of corrosion by increasing
sion
the eflciency of the electrolyte
humidity: the wetter the environment, the more corrosion
is likely to occur pollutants and acid gases: all promote
corrosion
Two broad categories of corrosion can be described as General and localized
Galvanic corrosion is an electrochemical action of two
dissimilar metals in the presence of an electrolyte and an
Describe galvanic corrosion
electron conductive path, Which occurs when the dissim-
ilar metals come into contact
Cathodic protection is the reduction or elimination of cor-
rosion by making the structure to be protected a cathode
Describe cathodic protection
by means of impressed current or attachment to a galvanic
anode
The two primary types of cathodic protection are Impressed current and galvanic (sacrificial)
1. Generators 2. Fuel cells 3. Wind powered cells 4. Ther-
impressed current power sources include: moelectric cells 5. Rectified commercial power 6. Solar
Cells
The separation of the coating from the surface through hy-
Describe cathodic disbondment droxyl formation due to increased ( made more negative
) potential.
, Dehumidification is the process of removing moisture va-
Describe dehumidification
por from the air to lower its dew point
Must be large enough to contain the whole work area.
Not be larger than the performance capabilities of the
dehumidification equipment.
When planning enclosures the following minimum re- Be sturdy enough to hold up to intended work activities,
quirements should be considered potential loads, and a possible inclement weather.
Have minimal leakage to maintain proper environmental
conditions and ensure the dehumidification system oper-
ates eflciently.
The air turnover principal illuminates air stratification, or
layering, in large open spaces by recirculating the hot air
Describe air turns (air changes) that becomes trapped in the higher spaces.
The number of times it does this per hour is called air
turns.
At & below what relative humidity does corrosion virtually
40%
cease
Describe two ways to reduce the relative humidity of the Increase the surface temperature and reduce moisture
boundary layer content by dehumidification
Types of dehumidification equipment include Refrigeration and desiccant
Dries the air. Lowers the dew point. Permits blasting the
entire surface. Holds the blast with dry air. Helps in clean-
Describe several benefits of dehumidification
ing the surface. Holds the surface during coating applica-
tion.
Relative humidity, air temperature, and dewpoint temper-
Electronic hygrometers can be used to determine
ature.
Advanced environmental testing instruments have the
ability to store data that can be transferred to a computer USB, IR, Bluetooth
and other devices. Transfer methods include
Some general basic centrifugal blast set ups include
, Tumbling mill, multitable, plain table, swing table, custom
designed systems
Centrifugal blasting conveyor systems are commonly used
Plate, rolled structural shapes, large trusses, girders
for cleaning
Ship decks, hull sides, and bottoms. Storage tanks. Con-
Portable centrifugal blasting systems can be used on
crete floors. Highways and bridge decks.
Centrifugal abrasive throwing wheel, the blast cabinet,
Generally centrifugal blast systems are composed of the in fixed systems some type of material handling system,
following elements abrasive recycling system, a dust collector and vent pipe
system, abrasives.
Abrasive operating mix, size of the abrasive, velocity of the
The eflciency of the centrifugal blast wheels depends on
abrasive coming ott the wheel, quantity and direction of
several factors
the thrown abrasive, condition of the feed parts.
Little amperage readings on a centrifugal blasting ma-
An abrasive starved wheel, a flooded or choked wheel
chine could signify
To control the sizing of the abrasive mix, to remove sand,
The functions of the centrifugal blasting machine separa-
spent abrasives, rust, dirt, and any other contaminants
tor include
from the abrasive stream, to control abrasive consumption
Provide consistency of the finish, ensure uniform abrasive
A well balanced operating mix (working mix) of abrasives coverage, ensure conditioning of the abrasive for opti-
will mum cleaning, minimize lowest abrasive and machine
part where and reduce downtime for maintenance
Monitor the dust collector, monitor the amperage of the
wheel motors / low amperage, Monitor the handling in
Some of the inspection concerns during centrifugal blast-
the loading of the conveyor line for contaminants and
ing include
possible discontinuities in the steel, monitor the speed of
wine, inspect the steel as it leaves the production line
The WJ-1 (visual cleanliness) is comparable to which abra-
ISO SA 3
sive blast cleaning standard
