Equipment Calibration & Maintenance Flashcards
7 cards from real CMS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Equipment Calibration & Maintenance flashcards as text
Which oil analysis parameter best indicates the presence of water contamination in a hydraulic system?
Answer: Karl Fischer titration (water content ppm)
Karl Fischer titration quantifies water content in parts per million (ppm), providing the most direct and accurate measurement of water contamination in lubricating oils.
A manufacturing plant uses 5S as part of its maintenance strategy. The '5th S' — Sustain — primarily means:
Answer: Making new habits a permanent standard through discipline and audits
Sustain (Shitsuke) is the ongoing discipline to maintain the 5S standards through regular audits, training, and management reinforcement so improvements do not revert.
Total Productive Maintenance (TPM) measures equipment effectiveness using Overall Equipment Effectiveness (OEE). Which three factors combine to calculate OEE?
Answer: Availability, Performance, Quality
OEE = Availability × Performance × Quality, capturing the percentage of planned production time that is truly productive.
When calibrating a load cell, applying loads in both increasing and decreasing sequences to assess output differences is testing for:
Answer: Hysteresis
Hysteresis is the difference in output readings for the same load value when approached from increasing versus decreasing directions, revealing mechanical or electronic lag in the sensor.
A calibration procedure specifies an 'as-found tolerance' of ±1% and an 'as-left tolerance' of ±0.5%. An instrument found at +0.8% deviation should be:
Answer: Adjusted to within ±0.5% and documented as adjusted
Because the as-found reading (+0.8%) is within tolerance but adjustment is required to meet the tighter as-left standard (±0.5%), the instrument must be adjusted and the calibration documented.
In vibration analysis for rotating machinery, 'imbalance' typically appears as a dominant peak at which frequency?
Answer: 1× running speed (1X)
Mechanical imbalance in rotating equipment generates a dominant vibration peak at 1× (one times) running speed in the frequency spectrum.
A maintenance engineer wants to identify the most critical equipment in a plant for prioritizing resources. Which tool ranks equipment by potential failure impact?
Answer: Failure Mode and Effects Analysis (FMEA) with Risk Priority Number (RPN)
FMEA assigns a Risk Priority Number (RPN = Severity × Occurrence × Detection) to each failure mode, allowing maintenance teams to rank and prioritize mitigation efforts.