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ASQ Certified Calibration Technician Free Sample Questions

Description

Covers general metrology and SI units, measurement methods and characteristics, calibration procedures and standardization, measurement uncertainty and applied math, and quality systems and standards.

12 free sample questions125 in the full practice test

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CCT Sample Questions

  1. Question 1

    Beginner

    General Metrology · Base SI Units

    A metrologist is tasked with calibrating a high-precision photometer used in an automotive lighting manufacturing facility. The calibration requires establishing traceability to the SI base unit for luminous intensity. Which of the following defines this specific SI base unit?

    Answer and explanation

    Correct answer: D

    The candela is the SI base unit of luminous intensity. Lumen is a derived unit for luminous flux, and lux is a derived unit for illuminance. The mole is the SI base unit for amount of substance.

  2. Question 2

    IntermediateMultiple answers

    General Metrology · Traceability Standards and Hierarchy

    A commercial calibration laboratory is updating its quality manual to explicitly define how measurement traceability is realized and disseminated. Which TWO of the following statements correctly describe acceptable paths or principles for establishing unbroken traceability to the International System of Units (SI)? (Select TWO)

    Answer and explanation

    Correct answers: B, D

    Traceability can be validly established through unbroken chains of comparisons linking to SI units, which is typically demonstrated by utilizing a National Metrology Institute (NMI) or an ISO/IEC 17025 accredited laboratory operating within its approved scope.

    Procuring primary reference materials or calibration services directly from an NMI (like NIST in the US) provides a direct link to the realization of the SI units.

  3. Question 3

    Advanced

    General Metrology · Substitution of Standards

    During a high-workload period, a laboratory's primary reference pressure controller is sent out for its annual calibration. The technical manager must decide if a secondary transfer standard can be substituted to calibrate a customer's working gauge. The customer's gauge has a stated accuracy of ±0.25% of full scale. The proposed substitute standard has an expanded uncertainty of ±0.10% of full scale. Based strictly on standard industry practices for Test Uncertainty Ratios (TUR), what is the correct evaluation of this substitution?

    Answer and explanation

    Correct answer: B

    TUR is calculated as the Tolerance of the UUT divided by the Uncertainty of the Standard. Here, 0.25 / 0.10 = 2.5. A 2.5:1 TUR falls short of the industry-preferred 4:1 ratio. Therefore, substituting this standard would likely require a risk assessment, guard-banding, or customer concession.

  4. Question 4

    Beginner

    General Metrology · Fundamental Constants

    True or False: In the revised International System of Units (SI), the value of the speed of light in a vacuum (c) is no longer an exact defined constant, but is instead an experimentally determined value subject to measurement uncertainty.

    Answer and explanation

    Correct answer: B

    False. The speed of light in a vacuum (c) is an exact, defined fundamental constant in the SI system (exactly 299,792,458 m/s). It is not subject to measurement uncertainty; rather, the meter is defined based on this exact constant.

  5. Question 5

    Intermediate

    General Metrology · SI Multipliers and Conversions

    A calibration procedure for an electrometer requires a test current of 500 nanoamperes (nA). The available source only allows input in microamperes (µA). The correct input value to achieve the required test current is: ________ µA.

    Answer and explanation

    Correct answer: B

    Nano (n) represents 10^-9, and micro (µ) represents 10^-6. To convert from nanoamperes to microamperes, you divide by 1,000 (or multiply by 10^-3). Therefore, 500 nA = 0.5 µA.

  6. Question 6

    Intermediate

    General Metrology · Measurement Standards

    A metrology lab maintains a strict hierarchy of standards to minimize wear on their most accurate equipment while maintaining traceability down to the production floor.

    Based on the typical dissemination hierarchy shown in the diagram below, which type of standard belongs in the position marked '[ ? ]'?

    flowchart TD NMI[National Metrology Institute \n e.g., NIST] --> Primary[Primary Standard] Primary --> Ref[Reference Standard] Ref --> Missing["[ ? ]"] Missing --> Working[Working Standard] Working --> UUT[Unit Under Test / IM&TE]
    Answer and explanation

    Correct answer: B

    In a robust metrology hierarchy, a Transfer Standard is often used as an intermediary to compare or transfer the value from a Reference Standard to a Working Standard. This minimizes the handling and degradation of the high-accuracy Reference Standard.

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