Reliability Engineering MCQ
1. What process causes a failure?
Answer
Correct Answer:
A degradation process
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2. What is a hazard rate?
Answer
Correct Answer:
Conditional failure rate
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3. How many production products are subjected to stresses beyond specifications?
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4. In what type of manufacturing process is 100% of the products produced subjected to stresses beyond specifications?
Answer
Correct Answer:
Environmental Stress Screening
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5. What type of distribution is the Weibull used in life data analysis?
Answer
Correct Answer:
Statistical
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6. Who developed the Weibull distribution?
Answer
Correct Answer:
Swedish mathematician Waloddi Weibull
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7. What type of distribution is often used in life data analysis?
Answer
Correct Answer:
Weibull distribution
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8. What is the total time a product will be functional with a specified reliability value?
Answer
Correct Answer:
Warranty time
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9. Warranty and return data is analyzed for what purpose?
Answer
Correct Answer:
The reliability characteristics of a product
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10. The analysis of warranty and return data for the purpose of determining the reliability characteristics of a product is called what?
Answer
Correct Answer:
Warranty analysis
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11. What is the amount of time during which a repairable unit is operating per design?
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12. What type of testing is used when the stress factors are temperature and another non-thermal factor?
Answer
Correct Answer:
Accelerated life testing
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13. An accelerated life testing model used when the two accelerating factors are temperature and another non-thermal stress factor is known as what?
Answer
Correct Answer:
Temperature-nonthermal model
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14. When are an accelerated life testing model used with two accelerating factors?
Answer
Correct Answer:
Temperature and humidity
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15. When is a temperature-humidity model used?
Answer
Correct Answer:
When the two accelerating factors are temperature and humidity
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16. The system reliability is defined by the what?
Answer
Correct Answer:
Reliability of the components as well as the way the components are arranged
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17. What type of FMEA is performed with the objective of improving the design of a system?
Answer
Correct Answer:
System FMEA
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18. What is the objective of an FMEA for a system?
Answer
Correct Answer:
Improving the design
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19. What is the result of stress-strength interference?
Answer
Correct Answer:
The probability of failure of an item
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20. What is the method used to calculate failure probability of an item?
Answer
Correct Answer:
Stress-strength interference
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21. What is an example use of a stress testing?
Answer
Correct Answer:
Induce failures
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22. What type of data might be collected and organized by the field of statistics?
Answer
Correct Answer:
The branch of mathematics that deals with the collection, organization, analysis and interpretation of data
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23. What is the art of mathematics that deals with the collection, organization, analysis and interpretation of data?
Answer
Correct Answer:
Statistics
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24. What type of testing is accept/reject sequential testing?
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25. What does SPRT stand for?
Answer
Correct Answer:
Sequential probability ratio test
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26. What is the provisioning of spares based on?
Answer
Correct Answer:
The anticipated number of failures
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27. What is the process of ensuring that spare parts are available for use in case of an emergency?
Answer
Correct Answer:
Spares provisioning
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28. What are the effects of failure that are estimated using the ratings?
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29. What are the Qualitative ratings used to estimate the severity of each effect of failure?
Answer
Correct Answer:
Severity ratings
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30. What is tested in a sequential manner?
Answer
Correct Answer:
Test units
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31. What is the testing methodology in which test units are tested consecutively instead of simultaneously?
Answer
Correct Answer:
Sequential testing
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32. What are the three categories of a Risk Priority Number system?
Answer
Correct Answer:
Severity (S), Occurrence (O) and Detection (D)
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33. What does RPN stand for?
Answer
Correct Answer:
Risk priority number
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34. What is an example of a preliminary analysis that often involves answering questions and/or assigning ratings about possible risks?
Answer
Correct Answer:
Risk discovery analysis
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35. What is the RCM analysis used for?
Answer
Correct Answer:
Reliability centered maintenance
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36. What might a unit's censored data represent?
Answer
Correct Answer:
Length of time during which a unit has operated without failure
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37. How long must a unit operate without failing before it is said to have been "curtailed"?
Answer
Correct Answer:
100-hour test
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38. What is a system that can be restored to operating condition after a failure by the repair or replacement of one or more components?
Answer
Correct Answer:
Repairable system
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39. What does repair distribution describe?
Answer
Correct Answer:
The probability of repairs occurring over time
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40. A model that describes the probability of repairs occurring over time is called what?
Answer
Correct Answer:
Repair distribution
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41. What does it mean to repair a part?
Answer
Correct Answer:
Restores a failed part or component to operating condition
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42. What is an action that restores a failed part or component to operating cistion?
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43. What is the term for the process of designing plans for reliability testing?
Answer
Correct Answer:
Reliability test design
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44. What type of analysis is applied to products under development?
Answer
Correct Answer:
Reliability growth analysis
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45. What is a type of analysis that looks at an asset to find potential failures?
Answer
Correct Answer:
Reliability centered maintenance
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46. What does quality refer to at one point in time?
Answer
Correct Answer:
The characteristics of a product
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47. What is the common buzzword used to refer to the non-quantifiable point-level excellence of a product or process?
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48. What type of model can account for multiple non-thermal stresses?
Answer
Correct Answer:
Proportional hazards model
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49. What is the FMEA used to improve?
Answer
Correct Answer:
Manufacturing process
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50. What is another name for an FMEA?
Answer
Correct Answer:
Process FMEA
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51. What type of process is used to create the PFD worksheet?
Answer
Correct Answer:
Manufacturing or assembly
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52. What is another name for FMEA?
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53. What is a PFD called that is used to help visualize a manufacturing process?
Answer
Correct Answer:
Flow diagram
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54. What does a Probability Plot allow the user to do?
Answer
Correct Answer:
Manually plot failure time vs. estimated unreliability
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55. A probabalistic plot allows the user to plot failure time vs. what?
Answer
Correct Answer:
Estimated unreliability
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56. What is the mathematical model that describes the probability of events occurring over time?
Answer
Correct Answer:
Probability density function
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57. The event in question is a failure in what application?
Answer
Correct Answer:
Life data analysis
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58. What is the probability of an unlikely event close to 0?
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59. Probability is commonly expressed on which scale?
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60. What is the probability of the union of all paths considered in path-tracing?
Answer
Correct Answer:
Reliability
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61. What is an example of a method for determining reliability of complex systems?
Answer
Correct Answer:
Systematic design review
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62. What are the occurrence ratings used to estimate the likelihood of failure?
Answer
Correct Answer:
Quantitative ratings
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63. What are the Qualitative Ratings used to Estimate the Likelihood of Occurrence for each Cause of Failure?
Answer
Correct Answer:
Occurrence ratings
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64. Gauss is the name of a mathematician, what is his profession?
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65. Gauss distribution was developed by who?
Answer
Correct Answer:
C. F. Gauss
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66. What is the abbreviation for "non-homogeneous Poisson process"?
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67. What does the acronym NHPP mean?
Answer
Correct Answer:
Non-homogeneous Poisson process
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68. What does "MTTR" stand for?
Answer
Correct Answer:
Mean time to repair
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69. What is the abbreviation for mean time to failure?
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70. What does "MTTF" stand for?
Answer
Correct Answer:
Mean time to failure
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71. What is the term used to describe the average time a system is available and operating?
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72. What does "MTBF" stand for?
Answer
Correct Answer:
Mean time between failures
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73. What kind of simulation uses random variables to generate values?
Answer
Correct Answer:
Monte Carlo
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74. What is a method of generating values from a known distribution for the purposes of experimentation?
Answer
Correct Answer:
Monte Carlo simulation
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75. What model is based on a variation of the Gompertz?
Answer
Correct Answer:
Modified Gompertz model
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76. What type of model uses the Gompertz model as a basis?
Answer
Correct Answer:
Reliability growth model
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77. What does the term "mode ratio" represent?
Answer
Correct Answer:
The percentage of all failures for the item that will be due to the given mode
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78. What is the term for the probability that the item's failure will be due to the failure mode under consideration?
Answer
Correct Answer:
Mode ratio
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Systems Engineering MCQs | Topic-wise
