Dynamics of Machinary MCQs with answers Page - 14

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Q. Which type of monitoring system uses stroboscope to measure speed of the machine?

  • (A) Portable condition monitoring system
  • (B) Basic condition monitoring system
  • (C) Computer based condition monitoring system
  • (D) None of the above

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Q. In FFT Spectrum Analyzer, the D/A converter is used to ________.

  • (A) reject unwanted signals
  • (B) sets the level of the signals to be fed to the A/D converter
  • (C) convert analog signals into digital signals
  • (D) converts digital signals into analog signals

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Q. In FFT Spectrum Analyzer, the A/D converter is used to ________.

  • (A) reject unwanted signals
  • (B) sets the level of the signals to be fed to the A/D converter
  • (C) convert analog signals into digital signals
  • (D) converts digital signals into analog signals

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Q. In FFT Spectrum Analyzer, the attenuator is used to ________.

  • (A) reject unwanted signals
  • (B) sets the level of the signals to be fed to the A/D converter
  • (C) convert analog signals into digital signals
  • (D) converts digital signals into analog signals

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Q. In FFT Spectrum Analyzer, the filter is used to ________.

  • (A) reject unwanted signals
  • (B) sets the level of the signals to be fed to the A/D converter
  • (C) convert analog signals into digital signals
  • (D) converts digital signals into analog signals

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Q. FFT analyzer can be used to find the ___________.

  • (A) natural frequencies
  • (B) mode shapes
  • (C) both natural frequencies and mode shapes
  • (D) none of the above

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Q. Fourier transform is a mathematical procedure to obtain the __________ of a given input signal.

  • (A) spectrum
  • (B) integration
  • (C) difference
  • (D) none of the above

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Q. In FFT Spectrum Analyzer, FFT stands for _______.

  • (A) Frequency Fourier Transform
  • (B) Fast Fourier Transmission
  • (C) Frequency Fourier Transmission
  • (D) Fast Fourier Transform

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Q. From the following, which one is used in an accelerometer?

  • (A) Dielectric crystals
  • (B) Piezoelectric crystals
  • (C) Optic crystals
  • (D) Diamond

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Q. The accelerometers are commonly used in vibration measurement due to their ___________.

  • (A) small size and low sensitivity
  • (B) the large size and high sensitivity
  • (C) the large size and low sensitivity
  • (D) small size and high sensitivity

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