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Automobile Engineering (April 2010)

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Total No. of Questions : 12] P1317 [Total No. of Pages : 3 [3764]-149 B.E. (Mechanical) AUTOMOBILE ENGINEERING (2003 Course) 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 Q1) a) Explain with help of neat sketch any one typical layout for an automobile engine and describe its advantages and drawbacks over other layouts.[8] b) List essential parts of the exhaust system. State their function each. [8] OR Q2) a) What are vehicle specifications? Explain classification of vehicles and chassis. Describe specification of any one light motor vehicle of your choice. [8] b) Explain classification of clutch. Describe with neat sketch function and [8] working of multiplate clutch. Q3) The coefficient of rolling resistance for a vehicle weighing 7500 kg is 0.016 and the coefficient of air resistance is 0.0028 in the formula R = kW + KaAV2 where Frontal area in M2, V is speed in kmph. The transmission efficiency in the top gear is 5.5 : 1 is 90% and that in second gear of 11 : 1 is 80%. The Frontal area is 5.57 M2. If the vehicle has maximum speed of 85 kmph in top gear, find engine power. If effective wheel diameter is 90 cm, find engine speed. Also determine the maximum grade the vehicle can negotiate at the above engine speed in second gear, as well as maximum draw bar pull on level at above engine speed in second gear. [16] OR P.T.O.

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Additional Info : 2003 Course
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