All of the following techniques are appropriate for reliability apportionment EXCEPT Response:

• A.Duane modeling.
• B.Part count.
• C.Advisory group on reliability of electronic equipment (AGREE) allocation methods.
• D.Basic weighted series.

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15 rocket booster engines were tested for a total of 5 hours. Three engines failed. What is the two-sided confidence interval for MTBF using 95% confidence?
Response:

• A.0.69, 8.06
• B.0.80, 9.50
• C.0.75, 9.20
• D.0.57, 8.06

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Given mean-time-to-failure of 200 hours for each of two components, what is the probability of system failure if both components operate in parallel for one hour?
Response:

• A.P = 0.001
• B.P = 0.005
• C.P = 0.000025
• D.P = 0.010

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Who should be chairperson of a design review committee?
Response:

• A.A senior member of management.
• B.The reliability engineer.
• C.The chief designer.
• D.The person best able to make decisions on a design.

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In a production reliability acceptance test (PRAT) plan, the design/discrimination ratio is expressed as the ratio of Response:

• A.Producer's risk/consumer's risk.
• B.Lower test MTBF/upper test MTBF.
• C.Upper test MTBF/lower test MTBF.
• D.Consumer's risk/producer's risk.

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