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          Code No: V3115/R07                                              Set No. 1
               III B.Tech I Semester Regular Examinations, November 2009
                             AUTOMOBILE ENGINEERING
                                 (Mechanical Engineering)
          Time: 3 hours                                         Max Marks: 80




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                               Answer any FIVE Questions
                              All Questions carry equal marks



            1. (a) What is the main reason for the development of two stroke engines? Classify
                   two stroke engines.                                                  [3+3]
                (b) In what respects CI engine differ from SI engine.                              [7]
                (c) Define the term scavenging.                                                    [3]

            2. (a) Describe the types of carburetors based on the direction of mixture flow. [4+4]
                (b) Explain the salient features of CARTER carburetor.                         [4+4]

            3. (a) Explain the reason for cooling an IC engine.                                   [4]
                (b) What are the various characteristics of an efficient cooling system.            [4]
                (c) Draw a sketch of cooling water system and name the various parts.             [4]

            4. (a) Mention the components of an ignition system and describe the following with
                   the help of neat sketches.
                      i. Ignition coil                                                            [5]




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                     ii. Contact breaker                                                          [5]
                (b) Sketch and explain the working Distributor and name the various parts.[3+3]

            5. (a) Explain the construction and working of an automotive ac generator. Why
                   ac-generators are popular comparing dc-generator?                [4+4+2]
                (b) Explain briefly the problems that may be encountered with the operation of
                    an alternator.                                                        [4]

            6. (a) Explain the working of cone clutch used in an automobile with a neat sketch.
                                                                                         [4+4]
                (b) How a single plate clutch is better compared to cone clutch.                  [8]

            7. (a) Explain the constructional details of a leaf spring with the help of a neat
                   sketch.                                                               [4+4]
                (b) Describe the features of a transverse leaf spring.                         [4+4]

            8. Write notes for the following:

                (a) Hill-holder                                                                   [4]
                (b) Leading and trailing shoes.                                                   [4]
                (c) Requirements of break fluid                                                    [4]
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          Code No: V3115/R07                                           Set No. 1
                (d) Break shoe material.                                                       [4]




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          Code No: V3115/R07                                             Set No. 2
               III B.Tech I Semester Regular Examinations, November 2009
                             AUTOMOBILE ENGINEERING
                                 (Mechanical Engineering)
          Time: 3 hours                                         Max Marks: 80




         www.andhracolleges.com
                               Answer any FIVE Questions
                              All Questions carry equal marks



            1. Sketch a chassis of any four wheeler and mark various parts on it. Explain the
               functions of various components of automobile.                          [8+8]

            2. (a) What are the advantages of port fuel injection systems over carburetor?[4+4]
                (b) How the fuel level in the float chamber of a carburetor is maintained at con-
                    stant level.                                                           [4+4]

            3. Explain the various types of engine cooling systems and compare them.         [8+8]

            4. (a) Explain the working of Centrifugal advance mechanism with the help of neat
                   sketch.                                                              [5+5]
                (b) Explain the function of lead-acid storage Battery.                           [6]

            5. (a) Name the various electrical components used in an automobile & give their
                   functions.                                                         [4+4]
                (b) Explain the working of a starter switch.                                  [4+4]




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            6. (a) List out the functions to be performed by the transmission system of an au-
                   tomobile.                                                                [8]
                (b) Explain the arrangements by which engine power is transmitted to the wheels.
                                                                                             [8]

            7. (a) Explain the constructional details of a leaf spring with the help of a neat
                   sketch.                                                               [4+4]
                (b) Describe the features of a transverse leaf spring.                        [4+4]

            8. (a) Explain clearly the working of the giriling mechanical brakes.             [4+4]
                (b) Explain the working of wheel cylinder.                                    [4+4]




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          Code No: V3115/R07                                            Set No. 3
               III B.Tech I Semester Regular Examinations, November 2009
                             AUTOMOBILE ENGINEERING
                                 (Mechanical Engineering)
          Time: 3 hours                                         Max Marks: 80




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                               Answer any FIVE Questions
                              All Questions carry equal marks



            1. (a) What are the objects of engine lubrication?                                  [4]
                (b) How two stroke engines are being lubricated.                                [6]
                (c) List the parts of any type of engine lubricating system.                    [4]

            2. (a) How the diesel fuel pump is tested for its performance?                   [4+4]
                (b) What is the purpose of helical groove in the diesel pump. Sketch its position
                    for different operating conditions of the engine.                       [4+4]

            3. (a) Explain the working of Dole thermostat.                                   [4+4]
                (b) What are the advantages of water cooling system over air cooling system. [8]

            4. (a) Explain with a neat sketch of capacitance discharge ignition system.      [4+4]
                (b) Discuss the effect of spark advance on pressure-crank angle diagram.         [8]

            5. (a) Describe the working of a fuel gauge.                                     [4+4]
                (b) Explain the working of a Horn cutout relay.                              [4+4]




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            6. (a) With the help of a neat sketch, explain the construction and operation of a
                   constant mesh gearbox.
                (b) What do you mean by double-declutching? Explain how and why it is done?


            7. (a) Discuss the merits of independent front suspension system.
                (b) Sketch a typical front suspension of a car and name its components.
                                                                                         [4+4]

                                                                                       [4+4]

                                                                                                [8]
                                                                                             [4+4]

            8. (a) Explain clearly how the King-Pin inclination produces directional stability?[4]
                (b) Explain why do the front wheels have to toe-out in turns?                [4+4]
                (c) Explain what is meant by center point steering.                             [4]




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          Code No: V3115/R07                                              Set No. 4
               III B.Tech I Semester Regular Examinations, November 2009
                             AUTOMOBILE ENGINEERING
                                 (Mechanical Engineering)
          Time: 3 hours                                         Max Marks: 80




         www.andhracolleges.com
                               Answer any FIVE Questions
                              All Questions carry equal marks



            1. (a) Compare the merits of front wheel drive vehicles with rear engine wheel drive
                   vehicles.                                                                  [8]
                (b) What is frameless construction? What are its advantages?                   [4+4]

            2. (a) Draw the layout of fuel feed system in a petrol engine and name and give the
                   functions of each component.                                           [4+4]
                (b) Explain the mechanism provided in a A C mechanical pump to stop the fuel
                    supply when the carburetor float chamber is full.                  [4+4]

            3. (a) Sketch and explain the working of water pump.                               [4+4]
                (b) Describe Troubles of cooling systems and their remedies.                   [4+4]

            4. (a) Mention the components of an ignition system and describe the following with
                   the help of neat sketches.
                      i. Ignition coil                                                            [5]
                     ii. Contact breaker                                                          [5]




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                (b) Sketch and explain the working Distributor and name the various parts.[3+3]

            5. (a) What is the principle of a generator? Give its constructional details       [4+4]
                (b) Explain the working of a cutout relay as used in the charging circuit         [8]

            6. (a) What are the requirements of a clutch?                                         [6]
                (b) With the help of a neat sketch, explain the construction and operation of a
                    sliding mesh gearbox.                                                 [5+5]

            7. (a) About what gear reduction is obtained in the differential on passenger cars
                   and on commercial vehicles? Does it vary from one vehicle to other. [4+4]
                (b) Explain the semi floating.                                                     [4]
                (c) What is the purpose of universal joint?                                       [4]

            8. (a) Explain clearly how the King-Pin inclination produces directional stability?[4]
                (b) Explain why do the front wheels have to toe-out in turns?                  [4+4]
                (c) Explain what is meant by center point steering.                               [4]



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