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Exam Information
Official specifications published by ASQ
Exam Format
Registration
Validity
Skills this practice test covers
- Convert values between SI multipliers, such as mega to kilo, and between English and metric units.
- Choose a measurement method, from direct and ratio measurement to substitution by the unit under test.
- Adjust measuring equipment by zeroing, spanning, nulling and linearization, and check the result.
- Build an uncertainty budget from Type A and Type B components and expand it with a coverage factor.
- Apply guard-banding and test uncertainty ratios to a pass or fail decision.
- Trace the impact of an out-of-tolerance standard with reverse traceability and customer notification.
Explore related topics
CCT exam content
5 domains · 32 topics · 125 questions
General Metrology24%30 questions
This domain sets out the units and standards behind every measurement. Candidates define the base and derived SI units, convert between multipliers, and trace a result through commercial and national laboratories back to the SI. Fundamental constants are tested by symbol and use, not by value.
Skills tested
- Define the seven base SI units, from the meter and kilogram to the candela and mole.
- Calculate and convert derived units such as the ohm, pascal, newton, joule and watt.
- Tell primary, secondary, reference, working, intrinsic and transfer standards apart.
- Decide when a calibration standard may be substituted, based on the measurement requirements and equipment specifications.
Questions by topic
- Base SI Units5
- Traceability Standards and Hierarchy3
- Substitution of Standards4
- Fundamental Constants5
- SI Multipliers and Conversions3
- Measurement Standards3
- Common Measurements4
- Derived SI Units3
Measurement Systems20.8%25 questions
This domain is about how a measurement is made and how good it is. Candidates compare measurement methods, read instrument specifications, correct error sources, and explain the parts of a measurement assurance program (MAP).
Skills tested
- Choose between direct, indirect, ratio, transfer, differential and substitution methods.
- Separate repeatability from reproducibility, and bias from linearity and stability.
- Read accuracy specifications stated against reading, range, full scale or display counts.
- Find and correct error sources such as drift, operator error and the environment.
- Explain proficiency tests, interlaboratory comparisons, gage R&R studies and statistical process control (SPC).
Questions by topic
- Measurement Characteristics5
- Error Sources5
- Measurement Assurance Program (MAP)4
- Measurement Methods5
- IM&TE Specification Terms and Characteristics4
- Measurement Data Considerations2
Calibration Systems22.4%29 questions
This domain follows equipment through the calibration lab: procedures, adjustment, environment, validation, records and reports. It also covers staff roles and the scheduling of calibration intervals and overdue lists.
Skills tested
- Apply a calibration procedure, including its required equipment and environmental limits.
- Control humidity, dust, temperature, vibration, pressure and electrostatic discharge (ESD) in the lab.
- Plan calibration intervals, notifications and overdue lists against staff workloads.
- Validate manual and automated calibration systems, including their software and firmware.
- Tell calibration certificates, calibration labels, nonconformance reports and test reports apart.
Questions by topic
- Standardization and Adjustment Methods4
- Environmental Control5
- Calibration Processes for IM&TE3
- Official Reports4
- Validation Processes5
- Records Management4
- Calibration Procedures2
- Industry Practices and Regulations2
Measurement Uncertainty and Applied Math20%25 questions
This domain turns readings into results that can be defended. Candidates build an uncertainty budget, expand it with a coverage factor and use it in conformity decisions. The math covers notation, unit conversions, ratios, parts per million, decibels, and reading tables and graphs.
Skills tested
- List Type A and Type B uncertainty components, such as environment, method and resolution.
- Combine standard uncertainties, then expand the result for a stated confidence level.
- Explain guard-banding, test uncertainty ratio, test accuracy ratio and the two kinds of decision error.
- Write values in scientific and engineering notation, and express them in parts per million or decibels.
- Read slope, intercept and extrapolated values from a table or graph.
Questions by topic
- Uncertainty Budget Components5
- Uncertainty Terminology7
- Technical and Applied Mathematics9
- Uncertainty Determination and Reporting4
Quality Systems and Standards12.8%16 questions
This domain places calibration inside a quality system. Candidates explain the standards and guides that a calibration lab works to, use the seven basic quality tools, and handle nonconforming equipment. Safety, housekeeping and the ASQ Code of Ethics are part of it too.
Skills tested
- Explain why ISO 9001:2015, ISO/IEC 17025:2017, ISO 10012, the GUM and the VIM matter to calibration.
- Use the seven basic quality tools, from check sheets and Pareto charts to control charts.
- Segregate nonconforming equipment and judge the impact with reverse traceability.
- Describe internal, external, product and process audits and the audit plan.
- Choose personal protective equipment (PPE) for a hazard, and apply 6S housekeeping in the lab.
Questions by topic
- Quality Control Tools4
- Occupational Safety Requirements3
- Quality Standards and Guides3
- Quality Audits2
- Corrective Action for Nonconformances2
- Professional Conduct and Ethics2
Requirements
- Required: five years of paid, full-time work experience in at least one area of the CCT Body of Knowledge.
- A technical, military or trade school diploma, or an associate degree, waives two of those years.
About the CCT exam
Traceability to SI units and a stated uncertainty make a calibration result trustworthy, and ASQ's CCT exam tests whether a technician can provide both. Its five domains move from SI units and measurement standards, through measurement methods and calibration procedures, to uncertainty budgets and quality standards such as ISO/IEC 17025:2017. ASQ asks for five years of paid work in the Body of Knowledge areas first. Passing earns the Certified Calibration Technician credential, which is valid for three years.
The PlanetCert practice test covers all five domains, with the most questions in General Metrology and Calibration Systems. Every answer has an explanation, which matters most for the calculations, where one wrong step in a unit conversion or a test uncertainty ratio leads to a wrong option. Flashcard mode suits the paired terms, such as repeatability and reproducibility, or false acceptance and false rejection. Brainy AI Assistant can rework an uncertainty budget with a different component, or explain when one standard may replace another.
How to earn the certification
- Earns
- Certified Calibration Technician (CCT)Technician
The CCT certification is valid for three years.
How to prepare for CCT
- 1
Master the units and prefixes
Write out the seven base SI units, the derived units in the Body of Knowledge and the multipliers from micro to mega. Convert between them until no step needs a reference.
- 2
Calibrate one instrument by procedure
Take a common instrument, such as a pressure gauge, through a written calibration procedure. Check the environment, adjust by zeroing and spanning, and record the results on a certificate.
- 3
Work an uncertainty budget by hand
List the Type A and Type B components for one measurement, combine them and expand the result with a coverage factor. Then compare it with the instrument's tolerance to find the test uncertainty ratio.
- 4
Lead with metrology and lab systems
General Metrology is the largest domain, and Calibration Systems comes close behind. Study standards, traceability and the flow of equipment through the lab before the quality topics.
- 5
Time a full run, then rework misses
Take the CCT practice test in Timed Mode once each domain feels solid. Rework every missed calculation on paper, and ask Brainy AI Assistant where the method went wrong.
Start a timed CCTrun
Who CCT is for
- Calibration technicians who check and adjust IM&TE in a calibration laboratory.
- Metrology and instrument technicians who keep plant or field measurements traceable.
- Quality staff who run calibration records, intervals and overdue lists.
- Technicians with several years of calibration work who want ASQ to recognize it.
Typical job titles: Calibration technician · Metrology technician · Instrument technician · Calibration laboratory technician · Quality technician
CCT glossary
18 terms from the exam objectives and the vendor's official material, each defined in a sentence.
- Coverage factor
- The number, often written k, that multiplies the combined standard uncertainty to give the expanded uncertainty.
- Gage R&R
- A gage repeatability and reproducibility study, which splits measurement variation into the part from the gage and the part from the people using it.
- Guard-Banding
- Setting acceptance limits inside the tolerance limits, so that a reading near the edge is not passed when its uncertainty could put it outside.
- GUM (JCGM 100:2008)
- The Guide to the Expression of Uncertainty in Measurement, the reference method for evaluating and reporting uncertainty.
- IM&TE
- Inspection, measuring and test equipment: the instruments and gauges that a calibration program controls.
- Intrinsic Standards
- Standards whose value comes from a natural physical effect, such as the triple point of water, instead of from a higher standard.
- ISO/IEC 17025:2017
- The international standard for the competence of testing and calibration laboratories.
- Measurand
- The particular quantity that a measurement is meant to find, such as the voltage across a resistor.
- Probability for False Acceptance (PFA / Type II Error)
- The chance of passing an item that is really out of tolerance; this risk falls on the customer.
- Repeatability
- How closely repeated readings agree when the same operator measures the same item in the same way and conditions.
- Reproducibility
- How closely readings agree when conditions change, for example with a different operator, place or instrument.
- Reverse traceability
- Working back from a standard found out of tolerance to every item it calibrated, so that the affected results can be reviewed.
- Test Accuracy Ratio (TAR)
- The tolerance of the unit under test compared with the stated accuracy of the standard, without a full uncertainty analysis.
- Test Uncertainty Ratio (TUR)
- The tolerance of the unit under test compared with the uncertainty of the calibration process; a higher ratio lowers the risk of a wrong decision.
- Traceability
- An unbroken chain of calibrations that links a measurement result to national or international standards, and so to the SI.
- Uncertainty budget
- A table that lists each source of uncertainty in a measurement, its size and type, and how the sources combine.
- Unit Under Test (UUT)
- The instrument being calibrated, as opposed to the standard that checks it.
- VIM
- The International Vocabulary of Metrology, which gives agreed meanings for terms such as measurand and traceability.