PHMSA CORROSION LATEST
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
1. The primary purpose of corrosion control is to:
A. Increase pipeline pressure
B. Prevent deterioration of pipeline systems
C. Reduce product flow
D. Increase pipeline temperature
Correct Answer: B
Rationale: Corrosion control protects pipelines from deterioration that
can lead to leaks or failures.
2. External corrosion occurs on:
A. Interior pipe surfaces only
B. Outside surfaces of the pipeline
END OF
PAGE
1
, PHMSA CORROSION LATEST
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
C. Compressor stations only
D. Valves only
Correct Answer: B
Rationale: External corrosion affects the outer surface exposed to soil or
atmosphere.
3. Internal corrosion is caused by:
A. Soil conditions
B. Corrosive substances inside the pipeline
C. Sunlight
D. External coatings
Correct Answer: B
END OF
PAGE
2
, PHMSA CORROSION LATEST
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Rationale: Water, gases, or chemicals inside the pipe may cause internal
corrosion.
4. Cathodic protection is used to:
A. Increase corrosion
B. Reduce corrosion by controlling electrical current
C. Clean pipelines
D. Increase flow rate
Correct Answer: B
Rationale: Cathodic protection mitigates electrochemical corrosion.
5. A sacrificial anode system uses:
END OF
PAGE
3
, PHMSA CORROSION LATEST
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
A. External power source
B. More reactive metals to protect the pipeline
C. Water pressure
D. Pipe insulation
Correct Answer: B
Rationale: Sacrificial anodes corrode instead of the protected pipe.
6. An impressed current system requires:
A. No electricity
B. External electrical power
C. Water circulation
D. Pipe replacement
END OF
PAGE
4
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
1. The primary purpose of corrosion control is to:
A. Increase pipeline pressure
B. Prevent deterioration of pipeline systems
C. Reduce product flow
D. Increase pipeline temperature
Correct Answer: B
Rationale: Corrosion control protects pipelines from deterioration that
can lead to leaks or failures.
2. External corrosion occurs on:
A. Interior pipe surfaces only
B. Outside surfaces of the pipeline
END OF
PAGE
1
, PHMSA CORROSION LATEST
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
C. Compressor stations only
D. Valves only
Correct Answer: B
Rationale: External corrosion affects the outer surface exposed to soil or
atmosphere.
3. Internal corrosion is caused by:
A. Soil conditions
B. Corrosive substances inside the pipeline
C. Sunlight
D. External coatings
Correct Answer: B
END OF
PAGE
2
, PHMSA CORROSION LATEST
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Rationale: Water, gases, or chemicals inside the pipe may cause internal
corrosion.
4. Cathodic protection is used to:
A. Increase corrosion
B. Reduce corrosion by controlling electrical current
C. Clean pipelines
D. Increase flow rate
Correct Answer: B
Rationale: Cathodic protection mitigates electrochemical corrosion.
5. A sacrificial anode system uses:
END OF
PAGE
3
, PHMSA CORROSION LATEST
CONTROL OF PIPELINE
SYSTEMS PRACTICE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
A. External power source
B. More reactive metals to protect the pipeline
C. Water pressure
D. Pipe insulation
Correct Answer: B
Rationale: Sacrificial anodes corrode instead of the protected pipe.
6. An impressed current system requires:
A. No electricity
B. External electrical power
C. Water circulation
D. Pipe replacement
END OF
PAGE
4
