MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
If an assignable cause is expected in the process, the subgroups taken subsequently should have a maximum difference. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
14 points in a row alternating up and down the mean will not indicate action needed for any process for which a control chart is plotted. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Which of these is not one of the sensitizing Western Electric rules that indicate action needed for Shewhart control charts? |
| A. | One or more points near a warning limit/control limit |
| B. | One point plots outside 3-sigma control limits |
| C. | Eight consecutive points plot on one side of the control line |
| D. | Two of 3 consecutive points plot beyond the 2-sigma warning limits |
| Answer» B. One point plots outside 3-sigma control limits | |
| 4. |
If the ARL is 34.8 for a process which has ATS=69.6 hrs, what is the time interval before taking samples? |
| A. | 0.5 hrs |
| B. | 8 hrs |
| C. | 2 hrs |
| D. | 4 hrs |
| Answer» D. 4 hrs | |
| 5. |
Which of these statements, correctly describes the concept of rational subgroups? |
| A. | If assignable causes are present, the chances of difference between subgroups should be largest |
| B. | If assignable causes are present, the chances of difference between subgroups must be lowest |
| C. | If assignable causes are present, the chances of difference between the subgroups must be moderate |
| D. | If assignable causes are present, the chances of difference between the subgroups must be zero |
| Answer» B. If assignable causes are present, the chances of difference between subgroups must be lowest | |
| 6. |
Decreasing sample size will ________ |
| A. | Decrease the slope of OC curve |
| B. | Increase the slope of OC curve |
| C. | First decrease then increase the slope of OC curve |
| D. | Makes OC curve have 0 slope |
| Answer» C. First decrease then increase the slope of OC curve | |
| 7. |
If for a process, the samples are taken 5 hrs apart and its ARL is 24.24, What will be ATS for it? |
| A. | 121.2 |
| B. | 110.0 |
| C. | 113.3 |
| D. | 137.8 |
| Answer» B. 110.0 | |
| 8. |
What is the full-form of ATS? |
| A. | Average time to Stop |
| B. | Average Time to Start |
| C. | Average Time to Signal |
| D. | Average Time to Select |
| Answer» D. Average Time to Select | |
| 9. |
For an average run length of 370, what will be the probability of a point falling out of the area between the control limits? |
| A. | 0.0027 |
| B. | 0.0013 |
| C. | 0.0045 |
| D. | 0.0040 |
| Answer» B. 0.0013 | |
| 10. |
The probability of a point to exceed the control limits for a control chart is 0.0040. What will be the ARL for this case? |
| A. | 250 |
| B. | 278 |
| C. | 210 |
| D. | 216 |
| Answer» B. 278 | |
| 11. |
ARL is termed as ____________ |
| A. | Average Run Length |
| B. | Allocating Run Length |
| C. | Affected Run Length |
| D. | Assumed Run Length |
| Answer» B. Allocating Run Length | |
| 12. |
The inner limits in the Two sets of limits approach of the construction of control chart are called _____ |
| A. | Action Limits |
| B. | Variable Limits |
| C. | Constant Limits |
| D. | Warning Limits |
| Answer» E. | |
| 13. |
If two sets of limits approach is taken to construct a control chart, what are the outer set of limits called? |
| A. | Action Limits |
| B. | Warning Limits |
| C. | Variable Limits |
| D. | Constant Limits |
| Answer» B. Warning Limits | |
| 14. |
If we decrease the distance between LCL and UCL, what will happen? |
| A. | Decreasing the possibility of type I error |
| B. | Increasing the possibility of type II error |
| C. | Increasing the possibility of type I error |
| D. | Decreasing the possibility of type II error |
| Answer» E. | |
| 15. |
Moving the UCL and LCL line far from the Center line means ____ |
| A. | Decreasing the possibility of type I error |
| B. | Increasing the possibility of type II error |
| C. | Increasing the possibility of type I error |
| D. | Decreasing the possibility of type II error |
| Answer» B. Increasing the possibility of type II error | |