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Free CCT Practice Questions

10 free, exam-style Certified Calibration Technician (CCT) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CCT practice test to study every exam domain.

Question 1

A calibration technician measures a UUT with a tolerance of ±0.5 V. The expanded uncertainty of the measurement process is ±0.2 V (k=2). What is the test uncertainty ratio (TUR)?

  1. 5.0:1
  2. 2.5:1
  3. 1.25:1
  4. 4.0:1
Show answer & explanation

Correct answer: B - 2.5:1

Question 2

Following the 2019 SI redefinition, the kilogram is now defined by fixing the numerical value of which fundamental constant?

  1. Boltzmann constant (k_B)
  2. Avogadro constant (N_A)
  3. Planck's constant (h)
  4. Elementary charge (e)
Show answer & explanation

Correct answer: C - Planck's constant (h)

Question 3

A technician determines the power dissipated by a resistor by measuring voltage and current separately and then calculating P = V × I. This is an example of which measurement method?

  1. Direct
  2. Indirect
  3. Differential
  4. Ratio
Show answer & explanation

Correct answer: B - Indirect

Question 4

A reference standard is found out of tolerance during its as-found check. After notifying the customer, which action is MOST critical?

  1. Adjust the standard immediately and resume calibrations
  2. Perform reverse traceability on all affected measurements
  3. Remove the reference standard from service permanently
  4. Re-run only the single most recent calibration performed
Show answer & explanation

Correct answer: B - Perform reverse traceability on all affected measurements

Question 5

Three independent standard uncertainty components are evaluated as 0.006 Ω, 0.008 Ω, and 0.003 Ω. Using a coverage factor of k=2, what is the expanded uncertainty?

  1. 0.017 Ω
  2. 0.021 Ω
  3. 0.034 Ω
  4. 0.011 Ω
Show answer & explanation

Correct answer: B - 0.021 Ω

Question 6

An instrument consistently reads 0.15 mA higher than the reference value at every test point across its full range. This systematic offset describes which measurement characteristic?

  1. Linearity
  2. Stability
  3. Bias
  4. Repeatability
Show answer & explanation

Correct answer: C - Bias

Question 7

A triple point of water cell that realizes the kelvin without being calibrated against another temperature standard is classified as which type of measurement standard?

  1. Primary
  2. Reference
  3. Transfer
  4. Intrinsic
Show answer & explanation

Correct answer: D - Intrinsic

Question 8

A calibration lab develops a custom procedure for a non-standard instrument that has no published calibration method. Per ISO/IEC 17025:2017, the lab must perform:

  1. Method verification
  2. Method validation
  3. Proficiency testing
  4. A management review
Show answer & explanation

Correct answer: B - Method validation

Question 9

All of the following are derived SI units tested in the CCT Body of Knowledge EXCEPT:

  1. Pascal
  2. Kelvin
  3. Hertz
  4. Watt
Show answer & explanation

Correct answer: B - Kelvin

Question 10

A technician encounters equipment bearing a GHS label with a flame pictogram and the signal word "Danger." Before proceeding, the technician should FIRST:

  1. Refuse to perform the calibration entirely
  2. Consult the Safety Data Sheet for that substance
  3. Put on every piece of PPE available in the lab
  4. Contact the equipment manufacturer for guidance
Show answer & explanation

Correct answer: B - Consult the Safety Data Sheet for that substance

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