MCQOPTIONS
Saved Bookmarks
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 the process mean increases very much, the modified control charts are not appropriate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The p-chart is the only chart to monitor the fraction of nonconforming units. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
A modified control charts limit expression does not contain ___________ |
| A. | δ |
| B. | σ |
| C. | μ |
| D. | α |
| Answer» D. α | |
| 4. |
Who was the first person to develop the acceptance control charts? |
| A. | Astern |
| B. | Roy |
| C. | Freund |
| D. | Crowder |
| Answer» D. Crowder | |
| 5. |
The approach of using a x chart to monitor the fraction of nonconforming units or the fraction of the units exceeding the specifications, is called the ___________ |
| A. | Shewhart control charts |
| B. | Cusum charts |
| C. | EWMA charts |
| D. | Acceptance control charts |
| Answer» E. | |
| 6. |
When the type I error is specified, the LCL of the modified control chart is ___________ |
| A. | \(LCL=LSL-\left(Z_δ-\frac{Z}{\sqrt{n}}\right)\) |
| B. | \(LCL=LSL-\left(Z_δ+\frac{Z}{\sqrt{n}}\right)\) |
| C. | \(LCL=LSL+\left(Z_δ+\frac{Z}{\sqrt{n}}\right)\) |
| D. | \(LCL=LSL+\left(Z_δ-\frac{Z}{\sqrt{n}}\right)\) |
| Answer» E. | |
| 7. |
From which chart the initial estimate of the process variability is determined? |
| A. | R-chart |
| B. | c-chart |
| C. | p-chart |
| D. | Cusum charts |
| Answer» B. c-chart | |
| 8. |
If there is a chance of shifting of the process variability, which chart may be used with the modified control chart? |
| A. | c-chart |
| B. | p-chart |
| C. | R-chart |
| D. | x̅ -chart |
| Answer» D. x̅ -chart | |
| 9. |
If process variability shifts, the modified control charts are ____________ |
| A. | Not appropriate |
| B. | Totally appropriate |
| C. | Good to use |
| D. | Perfect for the mapping the shifts |
| Answer» B. Totally appropriate | |
| 10. |
To design a modified control chart, we must have a good estimate of _________ available. |
| A. | μ |
| B. | σ |
| C. | μ2 |
| D. | process variance |
| Answer» C. μ2 | |
| 11. |
Which of the hypothesis can be tested using the modified control charts? |
| A. | μL ≤ μ ≤ μU |
| B. | μL ≤ μ |
| C. | μ ≤ μU |
| D. | μL = μ = μU |
| Answer» B. μL ≤ μ | |
| 12. |
____________ sigma limits are recommended for modified control charts. |
| A. | 4 |
| B. | 2 |
| C. | 3 |
| D. | 6 |
| Answer» C. 3 | |
| 13. |
When the type I error is not specified, the value of LCL of the modified control charts is ____________ |
| A. | \(LCL=LSL+\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \) |
| B. | \(LCL=LSL-\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \) |
| C. | \(LCL=LSL-\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \) |
| D. | \(LCL=LSL+\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \) |
| Answer» B. \(LCL=LSL-\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \) | |
| 14. |
Which of these is a correct expression for the UCL of the modified control charts when the type I error is not specified? |
| A. | \(UCL=USL+\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \) |
| B. | \(UCL=USL+\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \) |
| C. | \(UCL=USL-\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \) |
| D. | \(UCL=USL-\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \) |
| Answer» D. \(UCL=USL-\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \) | |
| 15. |
When the type I error is specified, which of these is correct expression for the UCL of the modified control charts? |
| A. | \(UCL=USL-\left(Z_δ+\frac{Z_α}{\sqrt{n}}\right) \sigma \) |
| B. | \(UCL=USL-\left(Z_δ-\frac{Z_α}{\sqrt{n}}\right) \sigma \) |
| C. | \(UCL=USL+\left(Z_δ+\frac{Z_α}{\sqrt{n}}\right) \sigma \) |
| D. | \(UCL=USL+\left(Z_δ-\frac{Z_α}{\sqrt{n}}\right) \sigma \) |
| Answer» C. \(UCL=USL+\left(Z_δ+\frac{Z_α}{\sqrt{n}}\right) \sigma \) | |