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2003 Course Manufacturing Automation & Control

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Total No. of Questions : 12] [Total No. of Pages : 4 P1142 [3864]-173 B.E. (Production) MANUFACTURING AUTOMATION AND CONTROL (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any three questions from each section. 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. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) b) c) For a 50 kN press tool weigh 5 kN. Calculate the pressure required for pressing operation if bore diameter of cylinder is 30 mm, rod area is 25 mm and counter balance valve is used in circuit. [6] What are the functions of fluid reservoir in hydraulic system? [4] Explain with neat sketch the working of deceleration valve. [8] OR Q2) a) What size of accumulator is necessary to supply 5000 cm3 of fluid in a b) hydraulic system having maximum operating pressure of 200 bar, which drops to minimum 105 bar. Assume adiabatic expansion and compression of gas with pre-charge of accumulator at 70 bar. [6] Explain with neat sketch the pressure reducing valve to maintain fixed pressure difference between inlet and outlet. [6] Explain with neat sketch working of swash plate type axial piston pump. [6] c) P.T.O.

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