NDT - Non-Destructive Testing NDT Certification and Practices Questions and Answers — Questions and Answers
Question 1: An NDT Level I technician performs an ultrasonic thickness test on a pipe following a detailed procedure. The technician obtains a reading that is significantly thinner than expected and is outside the normal range described in the instructions. According to ASNT's Recommended Practice No. SNT-TC-1A, what is the most appropriate action for the Level I technician to take?
- Independently declare the pipe as defective and recommend its immediate removal from service.
- Disregard the anomalous reading, assuming it is an instrument error, and continue testing other locations.
- Adjust the instrument's calibration settings until a reading within the expected range is achieved.
- Document the reading, report the finding to the supervising Level II or Level III technician, and ask for guidance. (Correct answer)
Correct answer: Document the reading, report the finding to the supervising Level II or Level III technician, and ask for guidance.
According to SNT-TC-1A, a Level I technician is qualified to perform specific calibrations and tests under supervision and according to written instructions. They are responsible for recording results but should receive guidance and supervision from a certified NDT Level II or III individual for the evaluation of unexpected or complex results. A Level I does not typically have the authority to sentence a component or deviate from the procedure without guidance.
Question 2: An employer wishes to establish an in-house NDT personnel qualification and certification program compliant with ASNT's Recommended Practice No. SNT-TC-1A. Who holds the ultimate responsibility for creating and approving the company's 'Written Practice'?
- A third-party NDT training organization.
- The American Society for Nondestructive Testing (ASNT).
- The employer, who typically delegates the task to a qualified NDT Level III. (Correct answer)
- The senior NDT Level II technician on staff.
Correct answer: The employer, who typically delegates the task to a qualified NDT Level III.
SNT-TC-1A clearly states that the certification of NDT personnel is the responsibility of the employer. The employer must establish a Written Practice, which is a formal document outlining the control and administration of NDT personnel training, examination, and certification. This Written Practice must be reviewed and approved by the employer's NDT Level III.
Question 3: Which of the following is a common near-vision acuity requirement for NDT personnel as specified by guidelines like ASNT SNT-TC-1A?
- The ability to read Jaeger Number 2 type and size letters at a distance not less than 12 inches (30.5 cm). (Correct answer)
- The ability to read Jaeger Number 5 type and size letters at a distance of 24 inches (61 cm).
- A one-time test for color vision differentiation at the beginning of an inspector's career.
- The ability to pass a far-vision test without the use of corrective lenses.
Correct answer: The ability to read Jaeger Number 2 type and size letters at a distance not less than 12 inches (30.5 cm).
ASNT's SNT-TC-1A recommends that NDT personnel have their near-vision acuity tested annually. A common standard is the capability to read Jaeger Number 2 or equivalent letters at a minimum distance of 12 inches (30.5 cm), with or without corrective lenses.
Question 4: An NDT Level II inspector is performing a magnetic particle inspection on a critical component and is pressured by the production supervisor to sign off on the part quickly to meet a shipping deadline. The inspector has not fully completed the evaluation as required by the written procedure. What is the most ethical course of action?
- Sign off on the part and complete the inspection later when time permits.
- Perform a quick, partial inspection and accept the part based on that limited data.
- Ask the production supervisor to sign off on the inspection report instead.
- Politely refuse to sign off and insist on completing the full inspection as required by the procedure, explaining that safety and quality cannot be compromised. (Correct answer)
Correct answer: Politely refuse to sign off and insist on completing the full inspection as required by the procedure, explaining that safety and quality cannot be compromised.
The ASNT Code of Ethics requires members to perform their work in the highest professional manner, protecting public safety. An inspector's primary duty is to the integrity of the inspection and adherence to the specified procedures, not to production schedules. Compromising an inspection due to external pressure is a serious ethical violation that could lead to catastrophic failure.
Question 5: Within the context of an employer-based certification program such as one based on SNT-TC-1A, what is the fundamental difference between 'qualification' and 'certification'?
- Qualification is the formal written document, while certification is the process of training and gaining experience.
- Qualification is the demonstration of skills, knowledge, and experience, while certification is the employer's written testimony confirming that qualification has been met. (Correct answer)
- Qualification is performed by a third-party agency, while certification is an internal company process.
- The terms are interchangeable and hold the same meaning in all NDT certification programs.
Correct answer: Qualification is the demonstration of skills, knowledge, and experience, while certification is the employer's written testimony confirming that qualification has been met.
In SNT-TC-1A, 'qualification' refers to the process where an individual demonstrates they have the required training, skills, and experience. 'Certification' is the act of the employer providing written testimony—a certificate—that the individual has successfully met the qualification requirements outlined in the company's Written Practice.
Question 6: Which of the following responsibilities is uniquely assigned to a certified NDT Level III?
- Performing on-the-job training for Level I personnel and trainees.
- Setting up, standardizing, and calibrating NDT equipment.
- Developing, qualifying, and approving NDT procedures and techniques. (Correct answer)
- Interpreting and evaluating test results according to applicable standards.
Correct answer: Developing, qualifying, and approving NDT procedures and techniques.
While Level II personnel can train Level I technicians and are qualified to interpret results, only an NDT Level III has the authority and qualification to develop, qualify, and approve the NDT procedures and written techniques that the Level I and Level II personnel must follow. This is a core responsibility that distinguishes the Level III role.
NDT - Non-Destructive Testing NDT Certification and Practices Questions and Answers
An NDT Level I technician performs an ultrasonic thickness test on a pipe following a detailed procedure.
The technician obtains a reading that is significantly thinner than expected and is outside the normal range described in the instructions.
According to ASNT's Recommended Practice No.
SNT-TC-1A, what is the most appropriate action for the Level I technician to take?