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. |
A change of process mean changes the value of Ci>Ci-1, so we can say that the process mean has shifted upwards. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Upward or downward shifts in the Cusum value, directly indicate changes in process condition. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
If the value of xi=9.29, and Ci-1=-2.56, what will be the value of the cumulative sum for this sample, if the value of μ0=10? |
| A. | -3.27 |
| B. | -5.13 |
| C. | 3.27 |
| D. | 5.13 |
| Answer» B. -5.13 | |
| 4. |
Which of these is another form of the cumulative sum value plotted on the cumulative sum chart? |
| A. | \(C_i=(x_i-μ)+\sum_{j=1}^{i-1} (x_j+μ)\) |
| B. | \(C_i=(x_i-μ)+C_{i-1}\) |
| C. | \(C_i=(x_i-μ)+\sum_{j=1}^{i-1} (x_j+2μ)\) |
| D. | \(C_i=(x_i-μ)-C_{i-1}\) |
| Answer» C. \(C_i=(x_i-μ)+\sum_{j=1}^{i-1} (x_j+2μ)\) | |
| 5. |
Which of these conditions don’t describe an assignable cause in the process? |
| A. | A positive shift in the Cusum value |
| B. | A negative shift in the Cusum value |
| C. | Random change in Cusum value |
| D. | Continuous upward drift of Cusum value after a continuous downward drift in the Cusum value |
| Answer» D. Continuous upward drift of Cusum value after a continuous downward drift in the Cusum value | |
| 6. |
A significant trend upwards in the process cumulative sum chart indicates ____________ |
| A. | Shifting of mean in the positive direction |
| B. | Shifting of mean in the negative direction |
| C. | No shift in the process condition |
| D. | No shift in the mean |
| Answer» B. Shifting of mean in the negative direction | |
| 7. |
How are the changes in the conditions of the process, known using the Cusum charts? |
| A. | By the change in Cusum value |
| B. | By the change in the sample standard deviation |
| C. | By plotting a s chart first |
| D. | By plotting an R chart first |
| Answer» B. By the change in the sample standard deviation | |
| 8. |
If the value of the cumulative sum shifts to a lower value what is likely to be the reason for it? |
| A. | The decrease in the value of the mean |
| B. | The increase in the value of the mean |
| C. | No change in the value of mean |
| D. | Decrement in the value of the standard deviation |
| Answer» B. The increase in the value of the mean | |
| 9. |
If the mean changes to a higher value, what will be the effect on the cumulative sum? |
| A. | Decrease |
| B. | Increase |
| C. | Can decrease or increase |
| D. | Can’t be predicted. |
| Answer» C. Can decrease or increase | |
| 10. |
Cumulative control charts were first presented by ____________ |
| A. | Shewhart |
| B. | ASQC |
| C. | ASQ |
| D. | Page |
| Answer» E. | |
| 11. |
Which of these control charts will have a better performance in the discrete part manufacturing assembly, where automatic measurement of each part is done? |
| A. | X bar charts |
| B. | Cusum charts |
| C. | u-charts |
| D. | c-charts |
| Answer» C. u-charts | |
| 12. |
The processes where discrete part manufacturing is done, which charts are better? |
| A. | p-charts |
| B. | c-charts |
| C. | Cusum charts |
| D. | X bar and R charts |
| Answer» D. X bar and R charts | |
| 13. |
Which charts are more effective for the chemical and process industries? |
| A. | p-charts |
| B. | c-charts |
| C. | X bar and s charts |
| D. | Cusum charts |
| Answer» E. | |
| 14. |
Which charts are particularly more effective for sample size one? |
| A. | p-charts |
| B. | c-charts |
| C. | X bar and s charts |
| D. | Cusum charts |
| Answer» E. | |
| 15. |
Which of these is a reason, why the Cusum charts are better than the Shewhart control charts? |
| A. | Because they are having information about only one sample |
| B. | Because the quantity plotted on the Shewhart control charts is variable |
| C. | Because the quantity plotted on the Cusum chart contains information about more than one sample |
| D. | Because the quantity plotted on the Cusum control charts is containing information about a single sample |
| Answer» D. Because the quantity plotted on the Cusum control charts is containing information about a single sample | |