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NEW QUESTION 80
One method of evaluating the design reliability is to analyze the design assuming the worst case. Which of the following techniques is NOT applicable for worst case analysis?
Response:
- A. Eyring model
- B. Monte Carlo
- C. Root-sum squared.
- D. Extreme value
Answer: A
NEW QUESTION 81
In a software development project, which of the following elements is NOT essential to ensure a reliable product?
Response:
- A. Ensuring that requirements based testing is performed.
- B. Specifying the software requirements in complete detail.
- C. Documenting changes made to the software during development.
- D. Performing a failure mode, effects, and criticality analysis on the software
Answer: D
NEW QUESTION 82
The BEST way to set an overall reliability goal is to:
Response:
- A. Put down specific numerical requirements for reliability statements of operating environments, and a definition of successful product performance.
- B. Insist that the goal be expressed in terms of mean-time-between-failures for all components and assemblies.
- C. Write a specification calling for a product to have high reliability and incorporate it into a contract.
- D. Indicate who would be at fault if the desired reliability is not obtained during the warranty.
Answer: A
NEW QUESTION 83
A design review committee has recommended changes to a proposed design. Whose job is it to investigate and incorporate the ideas that will aid product reliability?
Response:
- A. The reliability engineer.
- B. The senior decision maker.
- C. The design engineer.
- D. The design review chairman.
Answer: C
NEW QUESTION 84
A data collection, analysis, and reporting system should:
I. Permit detailed failure and failure rate analysis for varying environments, time periods, storage conditions, etc.
II. Provide distinction between items that failed and item that were wrongly removed.
III. Report data on successes as well as failures.
Response:
- A. I and III only
- B. II and III only
- C. I, II and III
- D. I only
Answer: C
NEW QUESTION 85
The techniques of design control are:
Response:
- A. Too expensive for general application.
- B. Applicable generally throughout industry.
- C. Unique to the aerospace industry.
- D. Limited to hardware-manufacturing enterprises.
Answer: B
NEW QUESTION 86
When failed field item are returned for failure investigation, which of the following steps should be taken first?
Response:
- A. The physics of failure should be used to determine failure mechanism.
- B. The manufacturing process should be reviewed to ensure that it was followed during the production of the failed items.
- C. Each item's predicted reliability should be compared with its actual reliability.
- D. Each item should be investigated to classify and completely determine the failure mode
Answer: D
NEW QUESTION 87
Which of the following is the MOST effective technique for prioritizing critical factors for problem- solving?
Response:
- A. Cause-and-effect diagram
- B. Venn diagram
- C. Scatter diagram.
- D. Pareto diagram
Answer: D
NEW QUESTION 88
Pascal's triangle presents a simple means of determining which of the various terms of the binomial expansion?
Response:
- A. Coefficients
- B. Permutations
- C. Exponents
- D. Combinations
Answer: A
NEW QUESTION 89
When a bathtub curve is used, one characteristic of the flat center portion of the curve is that during this period Response:
- A. The time of the next failure is predictable from the time of the last failure.
- B. There can be only one type of failure in the system.
- C. The equipment can be considered highly reliable.
- D. The reliability of the system can be expressed as an exponential function
Answer: D
NEW QUESTION 90
Which of the following reliability tests is conducted during the prototype stage?
Response:
- A. Screening test.
- B. Demonstration test
- C. Qualification test
- D. Acceptance test.
Answer: B
NEW QUESTION 91
Which of the following FTA statements is NOT true?
Response:
- A. It indicates the critical path from system failure to component failure.
- B. It illustrates the overall system behavior.
- C. It includes common mode failure effects.
- D. It provides corrective actions for component failures.
Answer: D
NEW QUESTION 92
What is meant by "derating"?
I. The technique of using a part, component, or equipment under stress conditions considerably below rated values, to achieve a "reliability margin" in design.
II. The technique of using a part, component, or equipment under normal conditions to achieve a reliable product design.
III. The technique of using a part, component, or equipment below stress conditions to achieve a reliable product design.
Response:
- A. I and III only
- B. I only
- C. III only
- D. I, II and III
Answer: B
NEW QUESTION 93
Which of the following action will help eliminate the effects of extraneous factors in a designed experiment?
Response:
- A. Repeating the experiment under different conditions.
- B. Randomizing the experiment.
- C. Selecting factor levels.
- D. Fractionating the experiment.
Answer: B
NEW QUESTION 94
If the plating time of a tube increases as the inside diameter decreases, then the correlation coefficient for the insider diameter versus plating time would be:
Response:
- A. Between 0 and -1
- B. Equal to 1
- C. Between 0 and +1
- D. Greater than 1
Answer: A
NEW QUESTION 95
A Reliability Engineering Department is conducting a training needs assessment. Which of these techniques are used for a training needs assessment?
I. Personal observations.
II. External customer surveys.
III. Costs analysis.
IV. Work sampling.
V. Interviews.
Response:
- A. I, III, IV and V only
- B. I, II, III, IV and V
- C. II, III and IV only
- D. I, IV and V only
Answer: C
NEW QUESTION 96
In which of the following situation is it NOT advantageous to use Bayesian in reliability calculation?
Response:
- A. When each piece of new information will arrive in random error.
- B. When no prior information is available.
- C. When both objective and subjective information must be used
- D. When both continuous and discrete data will be used.
Answer: B
NEW QUESTION 97
Which answer BEST describes the events and operating conditions an item experiences from mission initiation to completion?
The events may include the research and development phase, product manufacturing, warehousing, and so on, to mission completion.
Response:
- A. Mission reliability.
- B. Mission profile.
- C. Design adequacy.
- D. Operational readiness.
Answer: B
NEW QUESTION 98
Censoring of reliability data indicates which of the following?
I. Biased product data is used.
II. Testing has been failure terminated.
III. The data collection is time limited.
IV. Questionable data collection methods are used.
Response:
- A. I and III only
- B. I and IV only
- C. II and III only
- D. II and IV only
Answer: C
NEW QUESTION 99
An airline maintains a fleet of 4-engine aircraft. Its maintenance records show that on the average an engine fails 3 times in 10,000 operating hours with normal preventive maintenance.
What is the Poisson distributed probability that 2 or more engines on an aircraft will fail during a typical flying period of 8 hours?
Response:
- A. 0.0000029
- B. 0.000029
- C. 0.0000034
- D. 0.000034
Answer: A
NEW QUESTION 100
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