The primary aim of sequential-life testing is to determine
Response:

• A.The probability density function of failures.
• B.Whether a lot meets the reliability goal.
• C.The mean time between failures (MTBF).
• D.Whether the stress-level variation is significant.

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A certain light switch fails with a failure rate of 10 -4 . If the switch is used 20 times per week, what is the probability of the switch failing by the end of 3-year period?
Response:

• A.7.32 × 10 -5
• B.3.12 × 10 -1
• C.2.68 × 10 -1
• D.7.32 × 10 -1

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Which of the following is NOT a degradation mechanism?
Response:

• A.Derate
• B.Crack
• C.Fatigue
• D.Wear

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In the area of risk assessment, hazard severity categories are used to provide a measure of the seriousness involved. A system failure causing major environmental damage would be classified as:
Response:

• A.Marginal
• B.Catastrophic.
• C.Critical
• D.Negligible

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Corrective maintenance is performed in order to
Response:

• A.Reduce failure occurrence as directed by condition assessments.
• B.Restore a system to acceptable operation after a failure has occurred.
• C.Restore a system to acceptable operation during scheduled downtime.
• D.Correct potential failure on a regular schedule before they occur.

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