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Control
:11 Questions
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1. What is not a primary objective of SPC?
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Center the process
Determine changes in the process behavior
Monitor process in real time
Eliminate common causes of variation
3. What control chart is used when the sample size is between 4-10 per sub-group?
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X-MR chart
Xbar-R chart
Xbar-S chart
Median Chart
Email
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2. What is not a concept directly related to SPC
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SPC is developed by Walter Shewmart
Every process has variation
Variation is due to common and assignable causes
Use varying types of Control Charts
4. What control chart plots individual data points and the moving ranges?
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X-MR chart
Xbar-R chart
Xbar-S chart
Median Chart
5. What control chart plots the defects per unit?
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p chart
np chart
c chart
u chart
7. What is not a good rational sub-grouping practice?
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Use large sample size when using discrete data
Use many sub groups with small sub group size
Keep items within a sub-group homogeneous
Keep items between sub-group heterogeneous
9. Which among the following is not part of the 8 pillars of TPM?
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Make operators responsible for equipment maintenance
Schedule maintenance based on historical failure rates
EHS dept. ensures the health and safety of operators
Apply error or failure detection systems in equipment
6. What control chart plots the count of defects?
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p chart
np chart
c chart
u chart
8. Which among the following are not part of the statistical indicators of process changes in SPC?
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3 points in a row on the same side of the mean
4 of 5 points more than 2 sigma from the mean
6 points in a row all increasing or all decreasing
15 points in a row within 1 sigma from the mean
10. What is not among the 6 big losses that TPM intends to eliminate?
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Slow Downs
Rework
Breakdowns
Fatigue
11. What factor is not considered in computing for Overall Equipment Effectiveness (OEE)?
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Availability
Productivity
Quality
Security
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