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 electrical safety lockout/tagout (LOTO) step must occur FIRST before any equipment maintenance begins?
Answer: Identify all hazardous energy sources
The first step in LOTO is to identify all sources of hazardous energy (electrical, pneumatic, hydraulic, mechanical, thermal) before any isolation or lockout device is applied.
Which type of bearing defect frequency in vibration analysis corresponds to inner raceway damage?
Answer: Ball Pass Frequency Inner (BPFI)
Ball Pass Frequency Inner (BPFI) is the characteristic frequency generated when rolling elements pass over a defect on the inner raceway of a bearing.
A manufacturing facility's calibration program requires instruments to be recalibrated after a repair or modification. This requirement is based on:
Answer: The principle that repairs may alter the instrument's metrological characteristics
Repairs, modifications, or adjustments can change an instrument's accuracy, linearity, or stability, so recalibration is required to re-establish confidence in its measurements.
What is the main advantage of using a CMMS (Computerized Maintenance Management System) in a manufacturing plant?
Answer: It automates work order tracking, PM scheduling, and asset history management
A CMMS centralizes maintenance data, automates preventive maintenance scheduling, tracks work orders, and maintains equipment history to improve reliability and regulatory compliance.
During a precision alignment procedure for a pump-motor coupling, 'angular misalignment' refers to:
Answer: The shafts meeting at an angle rather than being parallel
Angular misalignment occurs when the centerlines of two coupled shafts intersect at an angle, causing dynamic loads on bearings and seals during rotation.
Under ISO/IEC 17025, a calibration laboratory must demonstrate measurement uncertainty. 'Expanded uncertainty' is reported at a coverage factor of k=2, which corresponds to approximately:
Answer: 95% confidence level
A coverage factor of k=2 provides approximately 95% confidence that the true value lies within the stated expanded uncertainty interval for a normal distribution.
A flow meter that reads accurately at mid-range but has increasing error toward the extremes of its measurement range is exhibiting:
Answer: Non-linearity
Non-linearity describes the deviation from a straight-line relationship between input and output across the measurement range, resulting in increasing errors at the extremes.