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In the calibration of an analog thermometer, the technician performs five measurements at 0°C (ice point) and obtains: 0.1, -0.1, 0.0, 0.2, -0.2°C. The standard deviation of these readings is approximately:

0.10°C

0.20°C

0.15°C

0.00°C

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Key Facts: CCT Exam

125

Scored Questions

ASQ

4h 18m

Exam Duration

ASQ

$360-460

Exam Fee

ASQ

5 yrs

Experience Required

ASQ

BoK Domains

ASQ 2024 BoK

Open Book

Exam Format

ASQ

The CCT has 125 scored questions (135 total) in 4h18m. Open book. Covers general metrology, measurement systems, calibration systems, uncertainty analysis, and quality standards including ISO/IEC 17025 and GUM.

Sample CCT Practice Questions

Try these sample questions to test your CCT exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1How many base SI units are defined in the International System of Units?

A.Five

B.Six

C.Seven

D.Eight

Explanation: The SI system defines exactly seven base units: meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (thermodynamic temperature), candela (luminous intensity), and mole (amount of substance). All other units are derived from these seven. Recognizing this foundational count is essential for the CCT exam.

2Which SI base unit is used to measure thermodynamic temperature?

A.Celsius

B.Kelvin

C.Joule

D.Candela

Explanation: The kelvin (K) is the SI base unit for thermodynamic temperature. Celsius is a derived scale offset from kelvin by 273.15, making it a derived unit rather than a base unit. Joule measures energy, and candela measures luminous intensity.

3What is the SI derived unit for electrical resistance?

A.Ampere

B.Volt

C.Ohm

D.Siemens

Explanation: The ohm (Ω) is the SI derived unit for electrical resistance, defined as one volt per ampere (V/A). The ampere is an SI base unit measuring current. The volt measures electrical potential difference. The siemens (S) is the unit for electrical conductance, which is the reciprocal of resistance.

4A calibration laboratory measures a voltage of 0.005 V. How is this value expressed using SI multipliers?

A.5 mV

B.5 μV

C.5 kV

D.0.5 cV

Explanation: The prefix 'milli' (m) represents 10⁻³, so 0.005 V = 5 × 10⁻³ V = 5 mV. The prefix micro (μ) represents 10⁻⁶, which would give 5,000 μV — not the direct expression. Kilo represents 10³ (much larger), and centi (10⁻²) would give 0.5 cV but this prefix is not commonly used for voltage.

5Which fundamental constant defines the speed of light in a vacuum?

A.Planck's constant (h)

B.Avogadro constant (NA)

C.Speed of light (c)

D.Boltzmann constant (kB)

Explanation: The speed of light in a vacuum (c) is approximately 2.998 × 10⁸ m/s and is a fundamental constant used in the definition of the meter. Planck's constant relates energy to photon frequency, the Avogadro constant defines the number of entities in a mole, and the Boltzmann constant relates temperature to thermal energy.

6In the SI hierarchy of measurement standards, which type of standard is maintained by national metrology institutes such as NIST?

A.Working standard

B.Transfer standard

C.Primary standard

D.Reference standard

Explanation: Primary standards are the highest-level standards maintained by national metrology institutes (NMIs) like NIST in the United States. They define the unit with the lowest measurement uncertainty. Working standards are used in daily laboratory operations. Transfer standards are used to convey traceability between laboratories. Reference standards are intermediate between primary and working standards.

7A technician needs to calibrate a precision torque wrench but the preferred torque reference standard is unavailable. Which concept governs whether a different standard can be used?

A.Gage R&R

B.Substitution of standards

C.Interlaboratory comparison

D.Measurement assurance program

Explanation: Substitution of standards refers to the practice of assessing when and how calibration standards can be swapped based on measurement requirements, equipment availability, and specifications. The key considerations are that the substitute standard must have adequate accuracy and be traceable to SI. Gage R&R, interlaboratory comparisons, and MAP are measurement assurance activities, not standard-selection decisions.

8Convert 2.5 kilometers to meters.

A.25 m

B.250 m

C.2,500 m

D.25,000 m

Explanation: The prefix 'kilo' means 10³ (1,000). Therefore, 2.5 km = 2.5 × 1,000 m = 2,500 m. SI prefix conversions are fundamental to calibration work, where technicians routinely convert between unit scales for measurement and documentation.

9Traceability in metrology means that a measurement result can be related to a stated reference through:

A.A single calibration certificate issued by any laboratory

B.An unbroken chain of comparisons with stated uncertainties

C.Regular proficiency testing with at least five laboratories

D.Manufacturer specification sheets for the instrument

Explanation: Metrological traceability is the property of a measurement result whereby the result can be related to a reference through a documented, unbroken chain of calibrations, each contributing to the measurement uncertainty. This chain typically leads back to national or international standards (such as NIST or SI units). A single certificate, proficiency tests, or manufacturer specs alone do not establish traceability.

10What is the SI derived unit for pressure?

A.Newton

B.Pascal

C.Joule

D.Watt

Explanation: The pascal (Pa) is the SI derived unit for pressure, defined as one newton per square meter (N/m²). The newton is the unit of force. The joule is the unit of energy. The watt is the unit of power (energy per time). Pressure measurement is a core competency for calibration technicians.

About the CCT Exam

The CCT validates expertise in calibrating, testing, and maintaining electrical, mechanical, electromechanical, analytical, and electronic measuring instruments. Certified Calibration Technicians ensure IM&TE conforms to established standards such as ISO/IEC 17025 and ISO 10012.

Questions

125 scored questions

Time Limit

4 hours 18 minutes

Passing Score

Scaled score (cut score not publicly disclosed by ASQ)

Exam Fee

$360 (members) / $460 (non-members) (American Society for Quality (ASQ))

CCT Exam Content Outline

24%

General Metrology

SI base and derived units, multipliers, fundamental constants, common measurements, traceability, measurement standards hierarchy

21%

Measurement Systems

Measurement methods, characteristics (repeatability, bias, linearity), error sources, IM&TE specifications, gage R&R, MAP

22%

Calibration Systems

Calibration procedures, adjustment methods (zeroing, spanning), environmental control, process flow, validation, records, certificates

20%

Measurement Uncertainty

TUR, TAR, guard-banding, PFA, PFR, Type A/B evaluation, RSS method, expanded uncertainty, coverage factors, applied math

13%

Quality Systems and Standards

ISO 9001, ISO/IEC 17025, ISO 10012, GUM, VIM, ILAC, quality tools, audits, corrective action, ethics, occupational safety

How to Pass the CCT Exam

What You Need to Know

Passing score: Scaled score (cut score not publicly disclosed by ASQ)
Exam length: 125 questions
Time limit: 4 hours 18 minutes
Exam fee: $360 (members) / $460 (non-members)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

CCT Study Tips from Top Performers

1Organize reference materials with tabs for GUM, ISO/IEC 17025, and SI unit tables before exam day

2Master TUR and TAR calculations — they appear in multiple questions and require formula recall

3Know the seven SI base units and their symbols by heart

4Understand the difference between Type A and Type B uncertainty evaluation methods

5Review ISO/IEC 17025:2017 requirements for calibration certificates, traceability, and nonconforming work

Frequently Asked Questions

How many questions are on the CCT exam?

135 total (125 scored + 10 unscored pretest items). The unscored items are randomly distributed and indistinguishable from scored questions.

What are the eligibility requirements for the CCT?

5 years of full-time, paid work experience in CCT BoK areas. Up to 2 years may be waived for diploma or degree holders from a technical school, college, or university.

Is the CCT exam open book?

Yes. All ASQ exams are open book. You may bring bound reference materials (ring binders, spiral-bound books). Unbound or hand-stapled materials are not permitted at Prometric test centers.

What is the CCT exam fee?

The initial exam fee is $360 for ASQ members and $460 for non-members. The retake fee is $260 for up to two years from your previous attempt.

100+ Free CCT Practice Questions

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