Practice Test Geeks(CET) Certified Electronics Technician Practice Test
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Test Equipment and Measurements 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 Test Equipment and Measurements flashcards as text

  1. On an oscilloscope, the timebase (horizontal axis) represents:

    Answer: Time in seconds per division

    The horizontal (X) axis of an oscilloscope is the timebase, calibrated in time units (seconds, ms, or µs) per division.

  2. What is the typical input impedance of a standard 1X oscilloscope probe?

    Answer: 1 megohm

    A standard 1X probe presents 1 megohm of input impedance to minimize circuit loading during measurements.

  3. If a 10X oscilloscope probe is used and the scope display reads 5V, what is the actual signal voltage?

    Answer: 50V

    A 10X probe attenuates the signal tenfold before the scope input, so the actual voltage is 10 times the displayed value: 5V × 10 = 50V.

  4. A decibel (dB) measurement expresses:

    Answer: A logarithmic ratio between two power or voltage levels

    The decibel is a dimensionless logarithmic ratio comparing two power or voltage levels, not an absolute quantity.

  5. What power level does 0 dBm represent?

    Answer: 1 mW

    0 dBm is defined as a power of 1 milliwatt; it is the 0 dB reference point on the dBm scale.

  6. Which multimeter setting must be selected to accurately measure AC line voltage?

    Answer: AC voltage (ACV)

    AC line voltage must be measured with the AC voltage (ACV) setting, since DC settings cannot properly respond to alternating waveforms.

  7. What does a frequency counter measure?

    Answer: The number of complete cycles per second

    A frequency counter counts complete waveform cycles per second, displaying the result in Hertz (Hz).