NDT Safety Protocols & Compliance Regulations 5 — Questions and Answers
Question 1: Which inspection interval requirement applies to boilers in continuous service under the National Board Inspection Code (NBIC)?
- Intervals set by the jurisdiction based on risk, typically annual internal and biennial external (Correct answer)
- A fixed 5-year internal inspection regardless of condition
- Only when a visible defect is reported by the operator
- Every 10 years if no pressure exceedances occur
Correct answer: Intervals set by the jurisdiction based on risk, typically annual internal and biennial external
NBIC and most jurisdictions require internal inspections typically on an annual cycle and external inspections on a biennial cycle, adjusted by risk-informed inspection programs.
Question 2: What is the key difference between an NDT indication and a defect in compliance documentation?
- An indication requires evaluation; a defect is an indication that has failed acceptance criteria (Correct answer)
- A defect is any signal detected; an indication requires engineering review
- They are interchangeable terms in ASME codes
- An indication is always rejected; a defect may be accepted
Correct answer: An indication requires evaluation; a defect is an indication that has failed acceptance criteria
An indication is any NDT signal that requires further evaluation, while a defect is an indication that exceeds the acceptance criteria defined in the applicable code.
Question 3: A boilermaker NDT crew is working near a chemical plant boiler. A toxic gas alarm activates. According to emergency action plan requirements, what is the immediate correct response?
- Evacuate immediately to the designated muster point following the site emergency action plan (Correct answer)
- Continue work while awaiting supervisor confirmation of the alarm
- Don respirators and remain at the work station
- Attempt to identify the gas source before evacuating
Correct answer: Evacuate immediately to the designated muster point following the site emergency action plan
OSHA 29 CFR 1910.38 requires employers to establish and workers to follow emergency action plans; when a hazardous alarm sounds, immediate evacuation to the muster point is the required response.
Question 4: Which body issues the Certificate of Inspection that legally authorizes a boiler to operate in most US states?
- The state boiler inspection jurisdiction or its authorized inspector (Correct answer)
- The original equipment manufacturer (OEM)
- ASME Headquarters
- The insurance company's underwriting department
Correct answer: The state boiler inspection jurisdiction or its authorized inspector
In most US jurisdictions, the state boiler inspection authority (or an authorized inspector acting on its behalf) issues the Certificate of Inspection required for legal operation.
Question 5: When eddy current testing (ET) is performed on boiler tubes, what PPE is specifically important due to the proximity of coil energization and metal surfaces?
- Electrical insulating gloves and eye protection (Correct answer)
- Hearing protection only
- Lead apron and thyroid shield
- Chemical splash goggles and nitrile gloves
Correct answer: Electrical insulating gloves and eye protection
Eddy current probes operate with electrical excitation; insulating gloves prevent shock risk, and eye protection guards against debris during probe insertion into tubes.
Question 6: What does a 'fitness-for-service' (FFS) assessment under API 579-1/ASME FFS-1 determine?
- Whether a degraded component can continue operating safely under defined conditions (Correct answer)
- Whether a new boiler meets manufacturing tolerances
- The annual maintenance budget for a facility
- The number of NDT technicians required per inspection
Correct answer: Whether a degraded component can continue operating safely under defined conditions
FFS assessments evaluate whether an in-service component with flaws or damage can continue to operate safely, potentially with modified conditions or a defined remaining life.
Question 7: A boilermaker NDT technician's Level II certification has expired during a project. Which action is compliant with ASNT SNT-TC-1A?
- Stop performing Level II tasks until recertification is completed per the employer's written practice (Correct answer)
- Continue working since skills do not expire with a certificate
- Operate under a Level I certification temporarily
- Obtain a 30-day extension from ASNT headquarters
Correct answer: Stop performing Level II tasks until recertification is completed per the employer's written practice
SNT-TC-1A requires that personnel be certified per the employer's written practice; expired certification means the technician no longer meets qualification requirements and must not perform Level II tasks.
NDT Safety Protocols & Compliance Regulations 5
Which inspection interval requirement applies to boilers in continuous service under the National Board Inspection Code (NBIC)?