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.
Response:
Analysis of data on all product returns is important because:
I. Failure rates change with length of product usage.
II. Changes in design and in customer use are often well reflected.
III. Immediate feedback and analysis of product performance becomes available.
Response:
If the probability of a car starting on a sub-zero morning is 0.6, and we have two such cars. What is the probability that at least one of the cars will start on a sub-zero morning?
Response:
With respect to calculating a mission reliability, the time of the operating mission is:
Response:
