API 570 Piping Inspector Certification
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. What is the primary purpose of API 570?
A. Design of piping systems
B. Inspection, repair, and alteration of piping systems
C. Welding certification
D. Pressure vessel fabrication
Answer: B
Rationale: API 570 covers in-service inspection, repair, alteration, and
rerating of piping systems.
2. Which document provides fitness-for-service assessment guidelines?
A. API 510
B. API 574
C. API 579
D. API 571
Answer: C
Rationale: API 579 is the standard for fitness-for-service evaluations.
3. What is the minimum requirement for external visual inspection frequency?
A. Every 2 years
, B. Every 5 years
C. At intervals not exceeding the greater of 5 years or half remaining life
D. Every 10 years
Answer: C
Rationale: API 570 specifies inspection intervals based on corrosion rate
and remaining life.
4. What type of corrosion results from fluid turbulence?
A. Galvanic corrosion
B. Erosion-corrosion
C. Pitting corrosion
D. Stress corrosion cracking
Answer: B
Rationale: Erosion-corrosion occurs due to high velocity or turbulence
removing protective films.
5. Which NDT method is best for detecting surface cracks?
A. Radiography
B. Ultrasonic testing
C. Magnetic particle testing
D. Eddy current
Answer: C
Rationale: Magnetic particle testing is ideal for detecting surface and
near-surface cracks in ferromagnetic materials.
6. What is the purpose of a corrosion allowance?
A. Reduce cost
B. Increase flow
C. Compensate for metal loss over time
D. Improve welding
Answer: C
Rationale: Corrosion allowance provides extra thickness to account for
expected corrosion loss.
, 7. Which API document provides damage mechanisms?
A. API 571
B. API 572
C. API 574
D. API 579
Answer: A
Rationale: API 571 outlines common damage mechanisms in refinery
equipment.
8. What is the main cause of galvanic corrosion?
A. Temperature differences
B. Contact between dissimilar metals
C. High pressure
D. Oxygen exposure
Answer: B
Rationale: Galvanic corrosion occurs when two dissimilar metals are
electrically connected in an electrolyte.
9. Which inspection method measures wall thickness?
A. Dye penetrant
B. Ultrasonic testing
C. Magnetic particle
D. Visual inspection
Answer: B
Rationale: Ultrasonic testing is commonly used for thickness
measurements.
10.What is remaining life based on?
A. Original thickness
B. Corrosion rate and current thickness
C. Design pressure
D. Temperature
Answer: B
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. What is the primary purpose of API 570?
A. Design of piping systems
B. Inspection, repair, and alteration of piping systems
C. Welding certification
D. Pressure vessel fabrication
Answer: B
Rationale: API 570 covers in-service inspection, repair, alteration, and
rerating of piping systems.
2. Which document provides fitness-for-service assessment guidelines?
A. API 510
B. API 574
C. API 579
D. API 571
Answer: C
Rationale: API 579 is the standard for fitness-for-service evaluations.
3. What is the minimum requirement for external visual inspection frequency?
A. Every 2 years
, B. Every 5 years
C. At intervals not exceeding the greater of 5 years or half remaining life
D. Every 10 years
Answer: C
Rationale: API 570 specifies inspection intervals based on corrosion rate
and remaining life.
4. What type of corrosion results from fluid turbulence?
A. Galvanic corrosion
B. Erosion-corrosion
C. Pitting corrosion
D. Stress corrosion cracking
Answer: B
Rationale: Erosion-corrosion occurs due to high velocity or turbulence
removing protective films.
5. Which NDT method is best for detecting surface cracks?
A. Radiography
B. Ultrasonic testing
C. Magnetic particle testing
D. Eddy current
Answer: C
Rationale: Magnetic particle testing is ideal for detecting surface and
near-surface cracks in ferromagnetic materials.
6. What is the purpose of a corrosion allowance?
A. Reduce cost
B. Increase flow
C. Compensate for metal loss over time
D. Improve welding
Answer: C
Rationale: Corrosion allowance provides extra thickness to account for
expected corrosion loss.
, 7. Which API document provides damage mechanisms?
A. API 571
B. API 572
C. API 574
D. API 579
Answer: A
Rationale: API 571 outlines common damage mechanisms in refinery
equipment.
8. What is the main cause of galvanic corrosion?
A. Temperature differences
B. Contact between dissimilar metals
C. High pressure
D. Oxygen exposure
Answer: B
Rationale: Galvanic corrosion occurs when two dissimilar metals are
electrically connected in an electrolyte.
9. Which inspection method measures wall thickness?
A. Dye penetrant
B. Ultrasonic testing
C. Magnetic particle
D. Visual inspection
Answer: B
Rationale: Ultrasonic testing is commonly used for thickness
measurements.
10.What is remaining life based on?
A. Original thickness
B. Corrosion rate and current thickness
C. Design pressure
D. Temperature
Answer: B
