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EndsemMay 20242019 patternBE Mech

Quality & Reliability Engineering (QRE) SPPU Endsem Question Paper May 2024

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated QRE questions
Subject code
402050A
Pattern
2019 pattern
Exam
Endsem
Session
May 2024
Max. marks
70
Time
2½ Hours
Semester
VIII
Paper code
[6263]-225

Printed for: B.E. (Mechanical)

Instructions to the candidates

  1. Draw suitable neat diagrams, whenever necessary.
  2. Figure to the right indicate full marks.
  3. Assume suitable data if required.

Questions

  1. Q1

    1. a)

      Explain the term Probability density function (PDF) & Cumulative Distribution Function (CDF).

      Also asked:May 2025

      [8]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [10]

  2. Q2

    1. a)

      List and compare discrete and continuous probability distributions.

      [9]
    2. b)

      Draw & explain a specimen “Bath Tub curve”.

      Also asked:Nov 2023

      [9]

  3. Q3

    1. a)

      Explain Cold, Warm & Hot Stand by Redundancy.

      Also asked:May 2025

      [8]
    2. b)

      A system have three elements 1, 2 and 3 connected in series with their failure rates of  l = 0.005,  2 = 0.003,  3 = 0.001 per hour respectively Assuming. mission time of 20 hours and system reliability of 0.95, find the reliability of each subsystem to achieve the desired reliability goal.

      Also asked:May 2025

      [9]

  4. Q4

    1. a)

      Explain with illustration reliability analysis of series, parallel & mixed configuration systems.

      Also asked:May 2025

      [8]
    2. b)

      The four main units connected in series together make an assembly of machine The individual reliabilities of units are 0.70. 0.80, 0.90 respectively. If the reliability is to be increased to a value of 0.65. Explain and find how the reliability of machine should be apportioned among these units with minimum effort technique.

      Also asked:May 2025

      [9]

  5. Q5

    1. a)

      Explain methods to determine minimal cut sets.

      [9]
    2. b)

      A room with two light bulb is operated by a single switch Assuming No light in the room as the top undesirable event construct the fault tree diagram.

      Also asked:Nov 2024

      [9]

  6. Q6

    1. a)

      State the basic concepts of FMEA and FMECA and explain in what way FMECA is different than FMEA. Also, state the basic analysis procedure for FMEA/FMECA.

      [9]
    2. b)

      Explain Ishikawa diagram for Failure representation with suitable example.

      [9]

  7. Q7

    1. a)

      What is Maintainability function? Distinguish between Breakdown maintenance and Preventive Maintenance.

      [9]
    2. b)

      Explain the term Margin of Safety & Factor of safety.

      [8]

  8. Q8

    1. a)

      Defined availability and maintainability the data for a CNC machine in a plant is as follows. Mean time before failure: 35 Hours Mean time to repair: 10 Hours Administrative logistics Time: 50% of MTTR Calculate operational availability and inherent availability for CNC machine. Electric Power Fuse Switch Bulb 2 Bulb 1

      [8]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]