MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Statistical Quality Control knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The 3 sigma limits on x bar control charts imply that the type I error probability is __________ |
| A. | 0.0012 |
| B. | 0.0072 |
| C. | 0.0027 |
| D. | 0.0037 |
| Answer» D. 0.0037 | |
| 2. |
Never attempt to interpret the chart when the R chart indicates the out of control condition. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Stratification of points on a control chart indicates __________ of natural variability of the process. |
| A. | Lack |
| B. | Increase |
| C. | Constancy |
| D. | Randomness |
| Answer» B. Increase | |
| 4. |
Stratification is defined as ________ |
| A. | Tendency for the points to cluster artificially around the center line |
| B. | Shift in the process level |
| C. | Continuous movement of points in one direction |
| D. | When the points fall near or slightly outside the control limits |
| Answer» B. Shift in the process level | |
| 5. |
Shift in process level can be seen on the control charts when __________ |
| A. | Operator fatigue occurs |
| B. | Temperature changes |
| C. | Over-control of process |
| D. | New workers introduction |
| Answer» E. | |
| 6. |
Which of these is a cause of trend patterns on a control chart? |
| A. | Gradual wearing out of some critical process component |
| B. | Operator fatigue |
| C. | Environmental changes |
| D. | Over-control |
| Answer» B. Operator fatigue | |
| 7. |
Which chart should be interpreted first when both, chart, and R chart are indicating a non-random behavior? |
| A. | chart |
| B. | R chart |
| C. | X and R chart |
| D. | Trial Limits |
| Answer» C. X and R chart | |
| 8. |
The control limits obtained by specifying the type I error level for the test, are called ________ |
| A. | Probability limits |
| B. | Trial limits |
| C. | Error limits |
| D. | Unreliable limits |
| Answer» B. Trial limits | |
| 9. |
When using standard values of process mean and standard deviation, the equation of UCL for a chart is given as, UCL = +A
|
| A. | 6/ n |
| B. | 3/ n |
| C. | n/6 |
| D. | n/3 |
| Answer» C. n/6 | |
| 10. |
Unlike chart, which measures between-sample variability only, an R chart is used to monitor ____ |
| A. | Both between-sample variability and within-sample variability |
| B. | Within-sample variability only |
| C. | Between-sample variability only |
| D. | Neither between-sample variability nor within-sample variability |
| Answer» C. Between-sample variability only | |
| 11. |
X bar chart monitors __________ |
| A. | Between-sample variability |
| B. | Within-sample variability |
| C. | Neither between-sample nor within-sample variability |
| D. | Both between-sample variability and within-sample variability |
| Answer» B. Within-sample variability | |
| 12. |
When the upper and lower natural tolerance limits are equal to the upper and lower specification limits, the process capability ratio, cp is ________ |
| A. | Greater than 1 |
| B. | 0 |
| C. | Less than 1 |
| D. | Equal to 1 |
| Answer» E. | |
| 13. |
When R chart is out of control, we __________ |
| A. | Eliminate the out-of-control points and recalculate the control limits |
| B. | Take one more sample and recalculate the control limits |
| C. | Eliminate the out-of-control points and the nearest two points, and recalculate the control limits |
| D. | Take no action |
| Answer» B. Take one more sample and recalculate the control limits | |
| 14. |
Once a set of reliable control limits is obtained, we use the control chart for monitoring future production. This is called __________ |
| A. | Phase I control chart usage |
| B. | Phase II control chart usage |
| C. | Phase III control chart usage |
| D. | Phase IV control chart usage |
| Answer» C. Phase III control chart usage | |