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2003 Course Industrial Hydraulics & Pneumatics

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Total No. of Questions : 12] P1343 [Total No. of Pages : 4 [3664]-142 B.E. (Mechanical Sandwich) INDUSTRIAL HYDRAULICS AND PNEUMATICS (402062) (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 electronic pocket calculator is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) Discuss important factors considered for selection of hydraulic fluids.[6] b) What types of heat exchangers are used in conjuction with hydraulic systems? [6] Explain with the help of graphs, the effect of temperature and pressure on hydraulic fluids. [6] OR c) Q2) a) b) c) What is the difference between static and dynamic seal? What are the sources of oil contamination? How to control it? [6] [6] Explain applications of fluid power in farm industry. [6] Q3) a) What is the function of a Hydraulic Power Unit? Explain with neat diagram. [8] b) What are the different applications of an accumulator? Explain with circuits. [8] OR Q4) a) Classify positive displacement pumps based on constructional features and oil flow. [8] An axial piston pump running at 1000 rpm. Pump has nine 15mm diameter pistons arranged on a 125mm diameter piston circle. The offset angle is set at 10 and the volumetric efficiency is 94%. Find the flow rate in L/s. [8] b) P.T.O.

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