Production error by human operators may be caused by:
I. Inadequate work space.
II. Inadequate job planning information.
III. Poor environmental conditions.
Response:

• A.All of the above
• B.II
• C.I and II
• D.I

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Which of the following reliability tests is conducted during the prototype stage?
Response:

• A.Demonstration test
• B.Qualification test
• C.Screening test.
• D.Acceptance test.

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Which of the following is the reason the bathtub curve has an increasing failure rate during the wear-out period?
Response:

• A.System effectiveness decreases rapidly at this stage.
• B.Design, materials and environment determine a limit of useful life.
• C.Design period does not project results past a predetermined time.
• D.Probability of failure is related to external factors that increase over time.

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Preventive maintenance programs are MOST effective when
Response:

• A.The hazard rate is constant.
• B.Random failure occur
• C.The hazard rate is decreasing.
• D.The hazard rate is increasing.

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The BEST way to set an overall reliability goal is to:
Response:

• A.Write a specification calling for a product to have high reliability and incorporate it into a contract.
• B.Put down specific numerical requirements for reliability statements of operating environments, and a definition of successful product performance.
• C.Insist that the goal be expressed in terms of mean-time-between-failures for all components and assemblies.
• D.Indicate who would be at fault if the desired reliability is not obtained during the warranty.

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