CCT Calibration Standards & Regulations 2 — Questions and Answers
Question 1: Which ISO standard specifically governs the competence of testing and calibration laboratories?
- ISO 9001
- ISO/IEC 17025 (Correct answer)
- ISO 14001
- ISO 45001
Correct answer: ISO/IEC 17025
ISO/IEC 17025 is the international standard that specifies general requirements for the competence, impartiality, and consistent operation of calibration and testing laboratories.
Question 2: What is the primary purpose of a NIST Traceable calibration certificate?
- To certify that equipment is under warranty
- To establish an unbroken chain of comparisons to national measurement standards (Correct answer)
- To confirm the equipment meets manufacturer specifications
- To document the equipment's calibration interval
Correct answer: To establish an unbroken chain of comparisons to national measurement standards
NIST traceability means the calibration result is linked through an unbroken chain of comparisons, each with stated uncertainties, back to national or international measurement standards.
Question 3: Under ISO/IEC 17025:2017, what must a laboratory do when it identifies nonconforming work?
- Immediately suspend all operations
- Evaluate the significance, stop delivery if needed, and take corrective action (Correct answer)
- Recalibrate all equipment in use that day
- Notify the customer only if the nonconformance was their fault
Correct answer: Evaluate the significance, stop delivery if needed, and take corrective action
ISO/IEC 17025:2017 requires laboratories to evaluate significance of nonconforming work, halt delivery where applicable, inform the customer, and implement corrective action.
Question 4: What does the acronym 'ILAC' stand for in the context of metrology and accreditation?
- International Laboratory Accreditation Cooperation (Correct answer)
- ISO Laboratory Audit Committee
- International List of Accredited Calibrators
- Instrument Linearity and Accuracy Certification
Correct answer: International Laboratory Accreditation Cooperation
ILAC stands for International Laboratory Accreditation Cooperation, a global network that promotes the acceptance of accredited laboratory results across borders.
Question 5: In the US, which organization is the primary accreditation body for calibration laboratories under ISO/IEC 17025?
- NIST
- A2LA (Correct answer)
- ANSI
- OSHA
Correct answer: A2LA
A2LA (American Association for Laboratory Accreditation) is the primary US accreditation body that accredits calibration laboratories to ISO/IEC 17025.
Question 6: Which clause of ISO/IEC 17025:2017 addresses impartiality requirements for calibration laboratories?
- Clause 4 (Correct answer)
- Clause 6
- Clause 7
- Clause 8
Correct answer: Clause 4
Clause 4 of ISO/IEC 17025:2017 covers general requirements including impartiality and confidentiality obligations for laboratories.
Question 7: What is the significance of a Mutual Recognition Arrangement (MRA) between accreditation bodies?
- It eliminates the need for calibration certificates
- It allows calibration results from one accredited lab to be accepted in another country (Correct answer)
- It standardizes calibration intervals globally
- It requires all labs to use the same reference standards
Correct answer: It allows calibration results from one accredited lab to be accepted in another country
An MRA between accreditation bodies means that calibration results from accredited laboratories in one signatory country are accepted in other signatory countries, reducing redundant testing.
CCT Calibration Standards & Regulations 2
Which ISO standard specifically governs the competence of testing and calibration laboratories?