Vibration Analysis Cat III Exam

The Vibration Analysis CAT III Online Examination assesses the advanced analytical knowledge and technical judgement required of a senior vibration analyst.

The questions focus on realistic machinery diagnostic situations rather than simple memorisation. Candidates may be required to select appropriate measurement settings, interpret spectra and time waveforms, analyse phase relationships, evaluate cross-channel measurements, identify resonance, interpret orbit plots, or determine the most appropriate corrective action.

The examination also evaluates the candidate’s understanding of signal processing, machine dynamics, rolling-element bearings, journal bearings, rotor dynamics, gears, electric motors, pumps, fans, compressors, acceptance testing, alarm management, and condition monitoring programme development.

Successful candidates demonstrate that they can combine information from multiple measurement formats, distinguish between faults with similar symptoms, assess data quality, and make reliable diagnostic and maintenance decisions.

Knowledge Areas Assessed

Signal Processing

• Sampling and aliasing
• Filters and dynamic range
• Signal-to-noise ratio
• Resolution, Fmax, and collection time
• Averaging methods
• Windowing and leakage
• Order tracking
• Time-synchronous averaging
• Correlation and coherence
• Cross-channel measurements

Advanced Analysis Techniques

• Spectrum analysis
• Time waveform analysis
• Phase analysis
• Bode and polar plots
• Run-up and coast-down analysis
• Operating Deflection Shape analysis
• Impact and resonance testing
• Introduction to modal analysis

Machinery Dynamics

• Mass, stiffness, and damping
• Natural frequencies
• Resonance and critical speeds
• Mode shapes
• Isolation and damping
• Structural correction methods

Fault Diagnosis

• Unbalance and misalignment
• Mechanical looseness
• Bent shafts and eccentricity
• Rolling-element bearing faults
• Gearbox faults
• Electric motor faults
• Pump, fan, and compressor problems
• Cavitation and flow-related vibration
• Belt-drive problems
• Reciprocating machinery faults

Journal Bearings and Rotor Dynamics

• Proximity-probe measurements
• Shaft and casing vibration
• Orbit plots
• Shaft-centreline plots
• Oil whirl and oil whip
• Rubs and preload
• Rotor critical speeds
• Fluid-film instabilities

Programme and Corrective Action

• Precision balancing and alignment
• Resonance correction
• Isolation and damping
• Alarm limits and trending
• Acceptance testing
• Data quality
• Diagnostic reporting
• Maintenance recommendations
• Condition monitoring programme management

Who Should Take This Examination?

• Participants who have completed the LGP Institute Vibration Analysis CAT III Course
• Experienced vibration analysts
• CAT II analysts progressing to an advanced level
• Condition monitoring specialists
• Reliability and rotating equipment engineers
• Predictive maintenance professionals
• Technical supervisors and programme managers

Before Taking the Examination

Candidates are strongly advised to complete the Vibration Analysis CAT III Course and review all course lessons before beginning the examination.

Make sure you have a stable internet connection and sufficient uninterrupted time. Carefully review all measurement units, analyser settings, machine diagrams, spectra, waveforms, phase values, and operating conditions included in each question.

Passing and Certification

A minimum score of 70% is required to pass the examination.

Candidates who successfully pass will receive a digital Vibration Analysis CAT III Certificate issued by LGP Institute, Türkiye.

Examination Information

• Examination Fee: USD 120
• Delivery Method: Online
• Level: Advanced
• Language: English
• Minimum Passing Score: 70%
• Certificate Issuer: LGP Institute, Türkiye
• Recommended Preparation: Completion of the Vibration Analysis CAT III Course
• Recommended Prior Knowledge: Vibration Analysis CAT II or equivalent experience