
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

2003 Course Reliability Engineering

5 pages, 32 questions, 0 questions with responses, 0 total responses,

	pune_eng	+Fave Message
	Profile Timeline Uploads Q & A

Home > pune_eng >

Formatting page ...

Total No. of Questions : 11] P1361 [Total No. of Pages : 5 [3864]-175 B.E. (Production) (Common to S/W) RELIABILITY ENGINEERING (2003 Course) (411085) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer three questions from section - I. and three questions from section - II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. SECTION - I Q1) a) b) Derive an expression MTTF = 1 nk k t N [6] In a survival test conducted on 160 cardboard boxes for their strength under impact loading, the following results were obtained: Number of impacts 20 30 34 36 39 42 45 47 50 Number of boxes failed 17 20 25 24 25 23 13 8 5 For this case, how will you define failure density, failure rate? c) [6] Explain with neat sketch early failure, random failure & wear out failure of Bath tub curve. [4] OR Q2) a) The results of tests conducted under severe adverse conditions on 250 safety valves are tabulated as given below. Calculate failure density (fd) and hazard rate Z(t) when the time interval is four hours instead of one hour. Also calculate number of survivors. [8] Time 00 0-4 4-8 8-12 12-16 16-20 00 135 35 32 22 15 20-24 interval No. of 11 failures P.T.O.

Formatting page ...

Tags : Pune, Engineering, University of Pune, Engineering question papers, Pune University, previous year question papers, question papers, india, model question paper, pune university paper pattern, pune university syllabus, old question papers

pune_eng chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: