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Mechanical System Design (April 2010)

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Total No. of Questions : 12] [Total No. of Pages : 6 P1393 [3764]-131 B.E. (Mechanical) MECHANICAL SYSTEM DESIGN (2003 Course) Time : 4 Hours] [Max. Marks : 100 Instructions to the candidate: 1) Answer three questions from Section I and three questions from Section II. 2) Answers to the two sections should be written in separate answer book. 3) Neat diagrams must be drawn wherever necessary. 4) Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) Derive the equation for the thickness of a thick cylinder subjected to internal pressure by maximum shear stress theory. [6] b) A cylindrical pressure vessel shell of inside diameter 1500 mm is subjected to an internal pressure of 2 MPa. The shell as well as the heads are made of low alloy steel with sult = 450 MPa. Double welded butt joints which are spot radiographed are used to fabricate the vessel. Corrosion allowance is 3 mm. Determine the thickness of the cylindrical shell and thickness of head if the heads are i) Flat ii) Plain formed iii) Torispherical with crown radius of 1125 mm. [12] OR Q2) a) Describe with sketch different types of supports used in horizontal pressure vessels. [6] P.T.O. 1

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Additional Info : 2003 Course
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