CEE_597_Midterm_1991 - CEE 597 - Risk Analysis and...

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Unformatted text preview: CEE 597 - Risk Analysis and Management Midterm Exam /?PI Test is open book and open notes. You have 50 minutes to complete this 50 point exam. 1. (5 points) Assume that in the US on average 9 telephone cables are broken per day somewhere due to construction and other such activities. What then are the probabilities of at least one break in 24 hours, and at least one break in a minute ? 2. (20 points) Consider the network below. a) What are the minimal cut sets ? b) If all components have a reliability R = 99.5%, provide a good estimate of the reliability of the system. C) If you had the opportunity of improving the reliability of any one component, which would you upgrade to improve the system's reliability ? d) Draw a fault tree to allow calculation of the failure probability for the system above. (You don't have to do the probability calculation.) 3. (15 points) A proposed management plan for low level nuclear waste would involve transport - along 2 routes. The frequency of accidents on each route is given below: Accident Prob. of Minor Prob. of Major Frequency Release per Release per Route {ver uear) Accident Acciden t 1 8.0~10'~ 0.1 0.02 2 4.0~10'~ 0.05 0.01 0....
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CEE_597_Midterm_1991 - CEE 597 - Risk Analysis and...

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