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2003 Course Dynamics of Machinery

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Total No. of Questions : 12] P1034 [Total No. of Pages : 5 [3864]-132 B.E. (Mech. and Mech./SW) DYNAMICS OF MACHINERY (2003 Course) (402042) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) 2) 3) 4) 5) 6) Answer three questions from section-I and three questions from section-II. Answers to the two sections should be written in separate books. Neat diagrams must be drawn wherever necessary. Figures to the right indicate full marks. Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. Assume suitable data, if necessary. SECTION - I Unit - I Q1) a) Explain the gyroscopic action in an air plane taking a vertical loop in the sky. Assume suitable directions and determine the effects of gyroscopic action. [6] b) Inertia of a pair of a locomotive driving wheels together with the shaft is 380 kgm2. The effect of diameter of each wheel is 2m and mean track width is 1.5m. The defect in the rail causes one wheel to fall and rise again 10mm in a total time of 0.1 sec., while the locomotive is traveling along a straight level track at 100 km/hr. If the fall and rise of the wheel is with simple harmonic motion, find the gyroscopic reaction couple on the locomotive. [10] OR Q2) a) Define following terms related to gyroscope, i) Axis of spin. ii) Axis of precision. iii) [3] Axis of couple. P.T.O.

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