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Sem - II Jun 2008 Pattern Basic Mechanical Eng.

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Total No. of Questions : 12] [Total No. of Printed Pages : 3 [3661]-110 F. E. (Semester - II) Examination - 2009 BASIC MECHANICAL ENGINEERING (June 2008 Pattern) Time : 3 Hours] [Max. Marks : 100 Instructions : (1) Solve questions No. 1 or 2, Q. No. 3 or 4, Q. No. 5 or 6 from section I and Q. No. 7 or 8, Q. No. 9 or 10, Q. No. 11 or 12 from section II. (2) Answers to the two sections should be written in separate answer-books. (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 Q.1) (A) Explain with defination : Internal Energy, Irreversible Process, Enthalpy, Pure Substance. [2x4=08] (B) A closed vessel contains 2 kg of carbondioxide at temperature 20oC and pressure 0.7 bar. Heat is supplied to the vessel till the gas acquires a pressure of 1.4 bar. Calculate final temperature, work done on or by gas, Heat added, change in internal energy. [Cv = 0.657 kJ/kg.K.] [2x4=08] OR Q.2) (A) Define with example : System, Surrounding, Isolated System, Throttling. [2x4=08] (B) Draw sketch of Heat Engine and Refrigerator using source and sink concepts. Also state relations for efficiency and COP. What is PMMII ? [4+2+2=08] [3661]-110 1 P.T.O.

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