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:

While testing a new design, you experienced 3 failures in 100 tests. What is the lower confidence limit for the unit's tested reliability based on a confidence level of 0.90?
Response:

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:

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

Preventive maintenance is characterized by:
I. Replacing failed/defect items as they are found in normal service use II. A planned program of tests, inspections, and/or replacements III. Replacing items just before they fail Response: