Intro to Maintainability DSP 3

TQ5
Indicate if the statement is true or false. If a statement is false, indicate the correct answer.
1. In vibration analysis, we often assume that an accelerometer signal is stationary. A
stationary signal has the property that the statistical properties of the signal do not change with time.
2. The error due to under-sampling a continuous signal can be avoided by simply
amplifying the signal.
3. The discrete Fourier transform (DFT) of a signal is periodic with period being a
function of signal sampling frequency.
4. Proximity or displacement sensors are commonly used to measure the movement of the shaft in a ball bearing.

5. Magnetic mounting is the best approach for mounting accelerometers on to bearing

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