CLS Technology & Digital Tools 3 — Questions and Answers
Question 1: Which lubrication technology uses ultrasonic detection to determine the optimal grease replenishment quantity for rolling element bearings?
- Vibration envelope analysis
- Ultrasonic acoustic emission monitoring during greasing (Correct answer)
- Infrared thermography trending
- Electrical resistance measurement
Correct answer: Ultrasonic acoustic emission monitoring during greasing
Ultrasonic acoustic emission levels drop when a bearing is under-greased and rise when properly lubricated, then drop again at over-greasing, allowing precise replenishment.
Question 2: A facility uses oil analysis software to set alarm limits. What statistical method is BEST for setting customized limits based on a machine's own historical data?
- ISO cleanliness code thresholds
- Standard deviation-based statistical process control (SPC) limits (Correct answer)
- OEM minimum viscosity requirements only
- NLGI grease grade guidelines
Correct answer: Standard deviation-based statistical process control (SPC) limits
SPC-based limits derived from a machine's own baseline history are more sensitive to that asset's actual condition changes than generic industry limits.
Question 3: Which output parameter from a portable viscometer is most directly used to assess in-service oil degradation in a hydraulic system?
- Total Base Number (TBN)
- Kinematic viscosity at 40°C (Correct answer)
- Particle count ISO code
- Oxidation FTIR absorbance
Correct answer: Kinematic viscosity at 40°C
Kinematic viscosity at 40°C is the primary hydraulic fluid property; significant deviation from the new-oil specification indicates degradation or contamination.
Question 4: What is the main advantage of using automated single-point lubricators with programmable timers over manual greasing routes?
- They eliminate the need for oil analysis
- They deliver consistent micro-doses of grease at set intervals regardless of operator availability (Correct answer)
- They increase lubricant viscosity over time
- They automatically sample oil for laboratory analysis
Correct answer: They deliver consistent micro-doses of grease at set intervals regardless of operator availability
Automated single-point lubricators dispense precise grease quantities on a fixed schedule, reducing over/under-greasing errors and ensuring lubrication even when technicians cannot access points regularly.
Question 5: In an IIoT-enabled lubrication monitoring platform, what type of data integration allows oil analysis results to be automatically correlated with vibration and temperature readings?
- Manual CSV import
- API-based sensor data fusion from multiple condition monitoring streams (Correct answer)
- MSDS database synchronization
- NLGI compatibility lookup table
Correct answer: API-based sensor data fusion from multiple condition monitoring streams
API-based data fusion connects oil analysis labs, vibration sensors, and temperature monitors into a unified dashboard, enabling holistic asset health assessment.
Question 6: A digital lubrication audit tool flags a grease fitting as 'inaccessible during operation.' What corrective technology should be recommended?
- Switching to oil mist lubrication system-wide
- Installing an extended grease line or remote grease fitting block (Correct answer)
- Eliminating the lubrication point entirely
- Increasing the grease NLGI grade
Correct answer: Installing an extended grease line or remote grease fitting block
Remote grease fitting blocks or extended lines route lube points to safe, accessible locations without requiring machine shutdown or exposure to hazards.
Question 7: Which feature of modern CMMS software BEST supports a reliability-centered lubrication (RCL) program by linking failure modes to specific lubrication tasks?
- Vendor contact directory
- Failure mode and effects analysis (FMEA) integration with PM task triggers (Correct answer)
- Automated purchase order generation
- Spare parts inventory tracking only
Correct answer: Failure mode and effects analysis (FMEA) integration with PM task triggers
FMEA integration maps each identified failure mode to the specific lubrication task that mitigates it, ensuring maintenance activities are consequence-driven rather than arbitrary.
CLS Technology & Digital Tools 3
Which lubrication technology uses ultrasonic detection to determine the optimal grease replenishment quantity for rolling element bearings?