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InsemOct 20242019 patternTE Mech

Design of Machine Elements (DME) SPPU Insem Question Paper Oct 2024

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated DME questions
Subject code
302043
Pattern
2019 pattern
Exam
Insem
Session
Oct 2024
Max. marks
30
Time
1 Hour
Semester
I
Paper code
[6360]-73

Printed for: T.E. ( Mechanical/ Mechanical- S .W) (Insem.)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicate full marks.
  4. Assume suitable data wherever necessary.

Questions

  1. Q1

    1. a)

      Explain the steps for design of Cotter Joint.

      [6]
    2. b)

      A knuckle joint is subjected to an axial load of 25KN.It is made of Plain carbon steel 45C8 (S yt =380 N/mm 2 ). Design the joint with factor of safety 2.5. Assume the compressive strength of the material to be 20% more than tensile strength. Allowable shear stress is 0.517 of the allowable tensile stress.

      [9]

  2. Q2

    1. a)

      Explain Lever, its types with neat sketch and applications.

      [6]
    2. b)

      A hollow circular column carries a projecting bracket. Which supports a load of 25kN as shown in Figure 1. The distance between the axis of the column and load is 500 mm. The inner diameter of the column is 0.8 times of the outer diameter. The column is made of steel FeE200 (S yt =200N/mm 2 ) and the factor of safety is 4. The column is to be designed on the basis of maximum tensile stress and compression is not the criterion of failure. Determine the dimensions of the cross section of the column. 2

      [9]

  3. Q3

    1. a)

      Explain the design Procedure for Flexible Coupling.

      [9]
    2. b)

      Compute diameter of bolt for rigid coupling is used to transmit 20 kW power at 720 rpm. There are four bolts and the pitch circle diameter of the bolts is 125 mm. The bolts are made of steel 45C8 (S yt =380 N/mm 2 ) and the factor of safety is 3. Assueme that bolts are finger tight in reamed and ground holes. Permissible stress is taken as 0.577 times yield stress.

      [6]

  4. Q4

    1. a)

      Explain the following keys with suitable sketch i) Sunk Key ii) Saddle Key iii) Kenndey key

      [6]
    2. b)

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

      [9]