NCCER Millwright Practice Exam

Which component helps detect vibration within a specific narrow band range?

1. Seismic sensors

2. Electronic filters

3. Dial indicators

4. Accelerometers

The correct answer is: Accelerometers

Accelerometers are devices specifically designed to measure acceleration forces. When it comes to detecting vibration, accelerometers are highly effective as they can capture dynamic changes in motion, allowing them to detect vibrations within a specific narrow band range. They convert the physical effect of motion into electronic signals that correspond to the magnitude and frequency of the vibrations experienced. This ability to detect frequencies and distinguish specific vibration patterns makes accelerometers especially useful in applications where monitoring equipment health and performance is critical. In contrast, while seismic sensors do measure vibrations or ground motion, they are generally more concerned with larger-scale movements, like those from earthquakes, rather than the precise narrow-range vibrations relevant to millwright applications. Electronic filters, on the other hand, process signals to isolate specific frequencies but do not directly measure vibration themselves. Dial indicators are mechanical devices used to measure linear displacement or position but do not have the capability to measure vibration frequency or amplitude. Therefore, in the context of vibration detection within a narrow band range, accelerometers stand out as the appropriate choice.