NDT Codes and Standards 3 — Questions and Answers
Question 1: API 570 applies to the inspection of which type of equipment?
- In-service pressure vessels
- Boilers and pressure relief valves
- In-service piping systems (Correct answer)
- Aboveground storage tanks
Correct answer: In-service piping systems
API 570 is the Piping Inspection Code covering in-service inspection, rating, repair, and alteration of piping systems.
Question 2: According to ASME Section XI, IWA-2300, what must be documented in the examination record?
- Only rejectable indications
- The examiner's personal notes and sketches only
- Examination coverage, equipment, personnel, and results including non-rejectable indications (Correct answer)
- Only indications that require repair
Correct answer: Examination coverage, equipment, personnel, and results including non-rejectable indications
ASME Section XI requires comprehensive examination records including coverage achieved, equipment calibration, personnel qualifications, and all indication results.
Question 3: Which NDT method standard does ASTM E709 cover?
- Liquid penetrant testing
- Magnetic particle testing (Correct answer)
- Radiographic testing
- Ultrasonic testing
Correct answer: Magnetic particle testing
ASTM E709 is the Standard Guide for Magnetic Particle Testing, providing guidance on technique and procedure.
Question 4: In NAS 410, what certification level is responsible for interpreting results and signing off examination procedures?
- Level I
- Level II
- Level III (Correct answer)
- Level IV
Correct answer: Level III
NAS 410 Level III personnel are responsible for establishing techniques, interpreting codes, and approving written procedures.
Question 5: What is the minimum required overlap of adjacent scan passes in automated ultrasonic testing per most codes?
- 5%
- 10% (Correct answer)
- 15%
- 25%
Correct answer: 10%
Most codes require a minimum 10% overlap of adjacent scan passes to ensure complete volumetric coverage of the examination volume.
Question 6: Under OSHA 1910.269, NDT of electrical utility equipment requires inspectors to be qualified under which specific standard?
- ASNT SNT-TC-1A
- ANSI/ASNT CP-189
- OSHA 29 CFR 1910.269 employer qualification (Correct answer)
- IEEE Std 62
Correct answer: OSHA 29 CFR 1910.269 employer qualification
OSHA 1910.269 requires employer-qualified personnel for electrical utility work rather than mandating a specific NDT certification standard.
Question 7: What does 'TOFD' stand for in advanced ultrasonic testing standards such as ASTM E2373?
- Total Output Frequency Detection
- Time-of-Flight Diffraction (Correct answer)
- Transducer Offset Frequency Determination
- Through-thickness Orientation Flaw Detection
Correct answer: Time-of-Flight Diffraction
TOFD (Time-of-Flight Diffraction) is an ultrasonic technique that uses diffracted signals from flaw tips to accurately size discontinuities.
NDT Codes and Standards 3
API 570 applies to the inspection of which type of equipment?