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Failure Rate and Hazard Rate, MTTF and MTBF, ReliabilityandMaintainability, hazard rate and reliability, normal and weibull, maintainability of the system, optimum maintainability, redundancy, perfect and imperfect switching, MTTR, equipment, Bays Decompositionmethod of reliability evaluation, Reliability and Safety, Monte-Carlo method
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RoliNoo 0"""'.""'''''''''' Total No. of Questions: 08] .~. [Total No. of Pages: 02
SUBJECT CODE: EC - 512 (Elective - I)
[Note: Please fill subject code and paper ID on OMR( Time: 03 Hours Instruction to Candidates:
Maximum Marks: 100
Ql) (a) Distinguish between the following: (i) Failure Rate and Hazard Rate. (ii) MTTF and MTBF.
(a) Discuss the importance of normal and weibull distribution in the field of reliability engineering. (b) The random variation with respect to time in the output voltage of an electrical system are exponentially distributed with a mean value of 200Y. What is the probability that the output voltage at any time will lie in the range of 180 to 200V.
Q3) (a) Give a concept of maintainability. How the inventory control of spares effect the maintainability of the system. (b) Explain Diagnostic instruments. (c) List out the factors to be provided in the design of a system to achieve optimum maintainability.
Q5)
'l.-(\ o-A..
(a) Compare active and passive redundancy.. (b) Explain role of standby units with perfect and imperfect switching. (c) An air craft la~d on two engines though it has four. If each engine has a reliability of 0.95, find the probability of successfullanding..
value engineering. ' Write short notes on any two: (a) Bays Decompositionmethod of reliability evaluation. (b) Reliability and Safety. (c) Monte-Carlo method.