Question 1 a) This question relates to probability distributions and methods used in engineering reliability. The Weibul

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Question 1 A This Question Relates To Probability Distributions And Methods Used In Engineering Reliability The Weibul 1 (127.28 KiB) Viewed 33 times

Question 1 a) This question relates to probability distributions and methods used in engineering reliability. The Weibull distribution for unreliability is as follows: B F(t) = 1-e-la i. Re-write the expression for reliability and explain your formulation. 13 Mark] ii. Explain the meaning on the terms 'a' and 'B' and discuss their significance. [3 Marks) iii. What do the values assigned to a and B represent? Draw graphs for p = 0.5, B = 1 and B = 3. [3 Marks] iv. Time to failure of an oil exploration drilling bit is assumed to have a Weibull distribution with a shape parameter of 2 and a scale parameter of 4000 hours. Calculate the reliabilities of the drilling bit for a drilling operation period of 2000, 4000 and 6000 hours. (5 marks] b) Define the meaning of Failure Mode Effects Analysis (FMEA) and detail the procedure for its use. [8 Marks c) Define the meaning of HAZOP, where in the design process should it be undertaken, and how should a HAZOP team be formed (describe in detail). [8 Marks