Metrology Practice Test

The Metrology Practice Test is a free intermediate-level, 20-minute skill test from Science of Apps. It tests metrology knowledge — the SI units and traceability, measurement error, uncertainty and the GUM, calibration, standards and instrument characteristics, statistics and process capability for measurement, and ISO/IEC 17025 and quality in the calibration laboratory — written to the BIPM SI brochure, the JCGM GUM and VIM, ISO/IEC 17025 and the NIST handbook for 2026. Score 70% or more on its 20 questions to earn a verifiable Metrology Proficiency certificate (SOA-D5E). Every question is based on published standards and research — including JCGM publications: Guide to the Expression of Uncertainty in Measurement (GUM) and VIM (BIPM), ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories (ISO), SI base and derived units (BIPM) — and each answer is explained with its source.

Science of Apps offers a free Metrology Practice Test, updated for 2026 and 2027. It measures SI units and traceability, error and uncertainty, calibration and instruments and statistics, capability and lab quality and gives instant results with a shareable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Metrology Proficiency certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: JCGM publications: Guide to the Expression of Uncertainty in Measurement (GUM) and VIM (BIPM); ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories (ISO); SI base and derived units (BIPM); e-Handbook of Statistical Methods (NIST); Process or product monitoring and control (NIST/SEMATECH e-Handbook); NIST/SEMATECH e-Handbook of Statistical Methods (process control) (NIST). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: SI Units and Traceability (Units, Realisation and Traceability); Error and Uncertainty (Error types, Uncertainty and GUM); Calibration and Instruments (Calibration, Standards and Characteristics); Statistics, Capability and Lab Quality (Statistics, Capability and ISO 17025). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Calibration or metrology technician, Quality or measurement engineer, Laboratory analyst, Instrumentation technician and Manufacturing quality specialist. It suits anyone who wants a quick, verifiable way to show Metrology knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

Metrology is the science of measurement. It covers the definition of units, the realisation of measurement standards, traceability, the estimation of uncertainty, and the calibration of instruments so that measurements are accurate, comparable and trustworthy.

Traceability is an unbroken chain of calibrations, each with stated uncertainties, linking a measurement result back to a reference such as an SI unit realised by a national metrology institute. It lets measurements made in different places be compared with confidence.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.