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Thursday, 23 May 2013

Automotive mechanics-model question paper for B.E/B.Tech Engineering

1(a) List the advantages of diaphragm clutch. (4 Marks)
(b) Describe the constant mesh gear box with the help of a sketch. (6 Marks)
(c) Write notes on two yoke universal joint and axle noise. (6 Marks)
(d) Specify two types of damage to tyres. Give their remedies. (4 Marks)
2(a) Explain the method of bleeding hydraulic system. (6 Marks)
(b) Explain the functions of unloader valve and torsion bar. (6 Marks)
(c) State how the leaf spring is maintained. (4 Marks)
(d) Give the reason for the front wheels having toe-out on turns. (4 Marks)
3(a) Describe the working of double overhead camshaft engine with neat figures. (8 Marks)
(b) Describe any two troubles of piston rings and suggest remedies. (4 Marks)
(c) How is the S.U. electric pump maintained? (4 Marks)
(d) Explain the operation of a mechanical petrol pump. (4 Marks)
4(a) What is the purpose of the venture tube in a carburetor? (4 Marks)
(b)  Describe the construction of the H-type S.U.carburettor. (6 Marks)
(c) What are the materials used in bearing alloys? (4 Marks)
(d) Describe the working of a turbo-charger with the help of a diagram. (6 Marks)
5(a) Explain the terms, ‘resistance of foaming’ and ‘ant-freeze solution’. (6 Marks)
(b) Draw the various types of open combustion chambers. Explain the cetane number of the diesel fuel.  (6 Marks)
(c) Write notes on ‘internal cam ring’ and ‘engine tuning’. (4 Marks)
(d) How is the pneumatic governor maintained? (4 Marks)
6(a) Compare lead-acid batteries with alkaline batteries. (6 Marks)
 (b) What are the advantages of the alternator over the dynamo? (4 Marks)
(c) Explain how ignition timing is adjusted in the engine. (4 Marks)
(d) Explain the advantages of the electronic ignition system as compared to the contact breaker point ignition system. (6 Marks)
7(a) How is the Bendix pinion device helpful in a starter? (4 Marks)
(b) Describe the function of the head lamp double filament. (4 Marks)
(c) Describe the operation of an evaporator used in car air-conditioning. (4 Marks)
(d) Name a few safety devices used in automotive air-conditioners. Explain any two devices using sketch. (8 Marks)
8 (a) What are the alternate fuels for automobile engines? Describe their characteristics. (6 Marks)
(b) Describe how compressed gas cylinders are stored and handled? (6 Marks)
(c) Describe the use of a universal extractor tool with the help of a diagram. (4 Marks)
(d) Discuss about the limits of speed for different types of motor vehicles. (4 Marks)


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