MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
γ in Weibull distribution graph indicates _________ |
| A. | earliest time of failure |
| B. | maximum time of failure |
| C. | shape of the graph |
| D. | scale of the graph |
| Answer» B. maximum time of failure | |
| 2. |
The time to failure of an electric bulb follows a Weibull distribution with scale = 2000 hours and shape = 0.5. What is the probability that the electric bulb will last more than 4000 hours? What is the mean time to failure? |
| A. | 25.3% |
| B. | 24.3% |
| C. | 26.3% |
| D. | 27.3% |
| Answer» C. 26.3% | |
| 3. |
The mean time of failure is given by the equation __________ |
| A. | E(X) = Γ(1/ 2β + 1) |
| B. | E(X) = Γ(1/ β + 1) |
| C. | E(X) = Γ(1/ β + 2) |
| D. | E(X) = Γ(2/ β + 1) |
| Answer» C. E(X) = Γ(1/ β + 2) | |
| 4. |
What is the mean time to failure if time to failure of a gadget follows Weibull distribution with scale = 1000 hours and shape = 0.5? |
| A. | 2500 hours |
| B. | 1500 hours |
| C. | 3000 hours |
| D. | 2000 hours |
| Answer» E. | |
| 5. |
What is the effect of the threshold parameter γ on the graph of Weibull distribution? |
| A. | graph shift to left or right |
| B. | graph shifts up or down |
| C. | height of the graph decreases |
| D. | height of the graph increases |
| Answer» B. graph shifts up or down | |
| 6. |
How can we increase the height of the graph of Weibull distribution? |
| A. | if η is decreased while β and γ are constant |
| B. | if η is increased while β and γ are constant |
| C. | if η is constant while β and γ are increased |
| D. | if η is constant while β and γ are decreased |
| Answer» B. if η is increased while β and γ are constant | |
| 7. |
For β greater than 1 there is an inflection point for Weibull function at ___________ |
| A. | (e1/β-1)/e1/β-1 |
| B. | (e1/β-1)/e1/β |
| C. | (e1/β-1)/e1/β-2 |
| D. | (e1/β-1)/e1/β-5 |
| Answer» C. (e1/β-1)/e1/β-2 | |
| 8. |
In Weibull distribution, if the value of β equal us equal to one that indicates the failure rate is constant over time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Weibull distribution gives the failure rate proportional to the power of time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
How many parameters are there in Weibull distribution? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |