While examining vibration analysis of a...

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Question 1 of 2066636eee28f7522a1c51e8b2

While examining vibration analysis of a particular piece of rotating machinery, one of the measurement location readings exhibits high amplitude/displacement in vertical and horizontal direction at 2 X RPM frequency. What would this indicate?

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🔍 Key Concepts

• 2X RPM vibration patterns in rotating machinery diagnostics • Typical vibration signatures of imbalance vs misalignment vs bearing faults • Direction of vibration: horizontal and vertical at the same location

💭 Think About

• Ask yourself: which common fault most often shows a strong vibration component at exactly twice running speed (2X RPM)? • Consider how pure imbalance usually appears in the spectrum: at what frequency relative to shaft speed and in which direction(s)? • Think about angular or offset misalignment between shafts: what kind of frequency pattern (1X, 2X, sometimes higher) and directions (radial vs axial) does it often create?

✅ Before You Answer

• Verify which fault type is classically associated with a dominant 2X RPM component in vibration analysis textbooks and USCG study guides. • Check whether bearing problems more often show up as specific bearing defect frequencies (ball pass, outer race, inner race) rather than clean multiples of RPM. • Confirm that the described symptom is at 2X RPM in both vertical and horizontal directions at the same measurement point, and match that pattern to the most characteristic fault.

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