The reliability block diagram of an operating system is shown in Fig.Q.6:- A Pump 1 Pump...
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The reliability block diagram of an operating system is shown in Fig.Q.6:- A Pump 1 Pump 2 Pump 3 NRV1 NRV2 NRV3 Fig. Q.6 M MV1 Given that:- - The failure rate of Pump 1 = 0.0002 - The failure rate of NRV1 = 0.0003 - The failure rate of Pump 2 = 0.0001 - The failure rate of NRV2 = 0.0004 - The failure rate of Pump 3 = 0.0002 - The failure rate of NRV3 = 0.0003 - The failure rate of MV1 = 0.0002 The components are repairable. B (a) Draw a fault tree for the Reliability Block Diagram as shown in Fig. Q.6. (8 marks) (b) Calculate the exact probability of failure and its reliability of the whole system at 2000 hours in operation. (11 marks) (c) Comment on the minimal path of the above reliability block diagram, and propose methods to increase the reliability of the whole system. (6 marks) The reliability block diagram of an operating system is shown in Fig.Q.6:- A Pump 1 Pump 2 Pump 3 NRV1 NRV2 NRV3 Fig. Q.6 M MV1 Given that:- - The failure rate of Pump 1 = 0.0002 - The failure rate of NRV1 = 0.0003 - The failure rate of Pump 2 = 0.0001 - The failure rate of NRV2 = 0.0004 - The failure rate of Pump 3 = 0.0002 - The failure rate of NRV3 = 0.0003 - The failure rate of MV1 = 0.0002 The components are repairable. B (a) Draw a fault tree for the Reliability Block Diagram as shown in Fig. Q.6. (8 marks) (b) Calculate the exact probability of failure and its reliability of the whole system at 2000 hours in operation. (11 marks) (c) Comment on the minimal path of the above reliability block diagram, and propose methods to increase the reliability of the whole system. (6 marks)
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