PIPELINE CORROSION CONTROL AND
CATHODIC PROTECTION STANDARDS TEST
EXAM WITH PROFESSOR VERIFIED ANSWERS
What is the difference between ductile and
brittle failures in pipelines? - answer-
Ductile failures involve significant
deformation before fracture, while brittle
failures occur with little deformation.
What is the goal of the PHMSA training
course? - answer-To provide inspectors
with the knowledge necessary to perform
effective inspections, not to train them as
corrosion technicians or engineers.
What are the objectives of the PHMSA
course? - answer-Identify regulations,
define pipeline corrosion terms, discuss
,corrosion control principles, identify failure
causes, and recall concepts of safety and
documentation.
What federal codes must operators comply
with regarding pipeline corrosion? -
answer-49 CFR Parts 192, 195, and 193.
Define corrosion. - answer-The
deterioration of a material, usually metal,
due to a reaction with its environment.
What causes galvanic corrosion? -
answer-Electrical contact with a more
noble metal or non-metallic conductor in a
corrosive electrolyte.
,What is a basic corrosion cell composed
of? - answer-Anode, cathode, electrolyte,
and metallic path.
What is the significance of soil resistivity in
corrosion? - answer-Soil resistivity affects
the corrosivity of the soil and the
effectiveness of cathodic protection.
What is the relationship between soil pH
and corrosion? - answer-Corrosion rates
vary with soil pH; acidic soils (pH 0-5) are
more corrosive than neutral (pH 6-8) or
alkaline soils (pH 9-14).
What happens to bonding electrons at the
anode during corrosion? - answer-The
metal loses bonding electrons, causing
, metal particles to detach from the pipe
surface.
How does cathodic protection work? -
answer-It consumes anode material, stops
corrosion cell action, and prevents
corrosion by supplying electrons to the
metal.
What are common causes of pipeline
failure? - answer-Mechanical damage,
corrosion damage, general corrosion, and
localized corrosion.
What is general or uniform corrosion? -
answer-Corrosion that occurs uniformly
over the entire pipe surface, rarely causing
failure.
CATHODIC PROTECTION STANDARDS TEST
EXAM WITH PROFESSOR VERIFIED ANSWERS
What is the difference between ductile and
brittle failures in pipelines? - answer-
Ductile failures involve significant
deformation before fracture, while brittle
failures occur with little deformation.
What is the goal of the PHMSA training
course? - answer-To provide inspectors
with the knowledge necessary to perform
effective inspections, not to train them as
corrosion technicians or engineers.
What are the objectives of the PHMSA
course? - answer-Identify regulations,
define pipeline corrosion terms, discuss
,corrosion control principles, identify failure
causes, and recall concepts of safety and
documentation.
What federal codes must operators comply
with regarding pipeline corrosion? -
answer-49 CFR Parts 192, 195, and 193.
Define corrosion. - answer-The
deterioration of a material, usually metal,
due to a reaction with its environment.
What causes galvanic corrosion? -
answer-Electrical contact with a more
noble metal or non-metallic conductor in a
corrosive electrolyte.
,What is a basic corrosion cell composed
of? - answer-Anode, cathode, electrolyte,
and metallic path.
What is the significance of soil resistivity in
corrosion? - answer-Soil resistivity affects
the corrosivity of the soil and the
effectiveness of cathodic protection.
What is the relationship between soil pH
and corrosion? - answer-Corrosion rates
vary with soil pH; acidic soils (pH 0-5) are
more corrosive than neutral (pH 6-8) or
alkaline soils (pH 9-14).
What happens to bonding electrons at the
anode during corrosion? - answer-The
metal loses bonding electrons, causing
, metal particles to detach from the pipe
surface.
How does cathodic protection work? -
answer-It consumes anode material, stops
corrosion cell action, and prevents
corrosion by supplying electrons to the
metal.
What are common causes of pipeline
failure? - answer-Mechanical damage,
corrosion damage, general corrosion, and
localized corrosion.
What is general or uniform corrosion? -
answer-Corrosion that occurs uniformly
over the entire pipe surface, rarely causing
failure.
