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2003 Course Manufacturing Automation & Control

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Total No. of Questions : 12] [Total No. of Pages :3 P975 [3664] - 155 B.E. (Production & Production S/W) MANUFACTURING AUTOMATION & CONTROL (2003 Course) Time : 3 Hours] [Max. Marks:100 Instructions to the candidates: 1) Answers to the two sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. 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) A pump has a displacement volume of 100 cm3. It delivers 0.00152 m3/sec at 1000 rpm and 70 bars. If the prime mover input torque is 125 N-m i) What is overall efficiency of the pump? ii) What is theoretical torque required to operate the pump? [6] b) Explain the terms i) Beta rating ii) Absolute rating. [4] c) Explain with neat sketch the working of a counterbalance value and draw a typical circuit showing its application. [6] OR Q2) a) b) c) A cylinder has to carry a load of 25000 N and it is to move over a horizontal surface at a speed of 25 m/min. It has to brought to speed as well as stopped within 15 mm, which results into a surge pressure of 440 bar. Calculate the diameter of cylinder. Assume coefficient of friction to be 0.15. [6] 3 Find the offset angle for axial piston pump, which delivers 0.0019 m /sec at 3000 rpm. Pump has nine 16 mm diameter pistons arranged on a 127 mm piston circle diameter. [4] Draw a neat sketch & explain pressure compensated flow control valve. [6] P.T.O.

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