Quality Control & Process Improvement Flashcards
7 cards from real CLS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Control & Process Improvement flashcards as text
A facility tracks lubrication-related Work Order closure rates as a KPI. Which trend should trigger a process improvement review?
Answer: Closure rate declining over three consecutive months
A sustained decline in work order closure rate signals systemic issues such as resource gaps, process inefficiencies, or escalating workload.
In a Six Sigma project to reduce lubricant-related component failures, the 'Measure' phase would primarily involve:
Answer: Collecting baseline data on failure rates, lubricant usage, and contamination levels
The Measure phase focuses on collecting quantitative baseline data to characterize current process performance before analysis begins.
Which sampling practice introduces the highest risk of a non-representative oil sample that could undermine QC decisions?
Answer: Sampling immediately after an oil change without running the equipment
Sampling right after an oil change captures clean oil unrepresentative of operating conditions, making the data useless for condition monitoring.
A lubrication audit reveals that 40% of grease points are being over-greased. Which improvement action directly addresses the root cause?
Answer: Installing single-point automatic lubricators with calibrated output volumes
Automatic single-point lubricators deliver precise, metered quantities continuously, eliminating the human variability that causes over-greasing.
A Total Productive Maintenance (TPM) program assigns operators to perform basic lubrication checks. How does this contribute to quality control?
Answer: It engages operators in early detection of lubrication defects closer to the point of use
Operator involvement in TPM creates an additional layer of continuous observation at the machine, enabling earlier detection of lubrication issues.
Which action is the most effective process improvement for reducing new lubricant contamination during storage and handling?
Answer: Installing desiccant breathers on storage containers and keeping drums indoors
Desiccant breathers prevent moisture and particulate ingress during thermal cycling, while indoor storage reduces temperature-driven contamination.
A CLS professional reviews oil analysis data and finds that particle counts are consistently high despite scheduled filter changes. What process improvement should be evaluated first?
Answer: Evaluating whether the current filter beta ratio is appropriate for the system's cleanliness target
If particle counts remain high despite filter changes, the filter's beta ratio (efficiency rating) may be insufficient to achieve the target cleanliness level.