For a high compression aircraft air conditioning system, the MTBF is 100 hours. This mean life is allocated for four serial units comprising the total system. The unit failure rates are then weighted as follows:
w 1 = 0.1250 w 3 = 0.1875
w 2 = 0.2500 w 4 = 0.4375
Based upon the above data, indicate which of the following is the correct calculation for one of the units.
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The investment in automated test equipment is often justified under which of the following circumstances Response:

Derating a component to 50 percent of its operating value will generally decrease its failure rate by a factor of:
Response:

Reliability can be specified in terms of all of the following EXCEPT:
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Customer feedback and data have been gathered on several new unknown failure modes, what would be an appropriate analysis tool to use on the data?
Response: