Practice Test Geeks(CET) Certified Electronics Technician Practice Test
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Data Quality & Completeness Flashcards

7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Data Quality & Completeness flashcards as text

  1. A technician evaluates a sensor's ability to detect the smallest meaningful change in the measured variable. This specification is called:

    Answer: Resolution

    Resolution is the smallest change in the measured quantity that produces a detectable change in the instrument's output.

  2. In digital communications, a CRC-16 generates a remainder of 0 upon checking received data. This indicates:

    Answer: No errors were detected in the received data

    A remainder of zero after CRC division means no errors were detected; however, CRC cannot guarantee absolute error-free data for all error patterns.

  3. Which term describes the closeness of agreement among repeated measurements of the same quantity under identical conditions?

    Answer: Precision

    Precision (or repeatability) refers to how closely repeated measurements agree with each other, independent of how close they are to the true value.

  4. An electronics technician finds that an oscilloscope probe has a 10:1 attenuation ratio. If the displayed voltage is 3.5 V, the actual circuit voltage is:

    Answer: 35 V

    A 10:1 probe attenuates the signal by a factor of 10, so the actual voltage is the displayed value multiplied by 10 (3.5 × 10 = 35 V).

  5. What is the primary purpose of using a guard ring in a high-precision measurement circuit?

    Answer: To reduce leakage currents that would corrupt high-resistance measurements

    Guard rings intercept leakage currents from high-impedance nodes and return them to a driven guard voltage, preventing them from corrupting sensitive measurements.

  6. In data acquisition, which technique involves taking multiple samples and averaging them to improve effective resolution?

    Answer: Oversampling and decimation

    Oversampling followed by digital filtering and decimation can increase the effective number of bits (ENOB) beyond the ADC's native resolution.

  7. A spectrum analyzer measurement shows a spurious signal 60 dBc below the fundamental. What does 'dBc' indicate?

    Answer: Decibels relative to the carrier or fundamental signal

    dBc (decibels relative to carrier) expresses the power of a signal relative to the fundamental or carrier signal power.