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[April-13][EURME 604/EIRME 605]

B.Tech. & Integrated Dual Degree (B.Tech.+M.Tech.)Examination

Mechanical Engg. & Int. Mechanical Engg.VI SEMESTER

AUTOMOBILE ENGINEERING(Effective from the admitted batch 2008 09)(Effective from the admitted batch 2010 11)

Time: 3 Hours Max.Marks: 60-------------------------------------------------------------------------------------Instructions: Each Unit carries 12 marks.

Answer all units choosing one question from each unit.All parts of the unit must be answered in one place only.Figures in the right hand margin indicate marks allotted.

---------------------------------------------------------------------------------------------

UNIT-I

1. a) Draw the valve and valve gear mechanism used in four stroke

engine and explain 6 b) Why the piston rings are to be incorporated between the pistonand cylinder? Explain 6

OR

2. a) What are different types of pistons used in automobile engines?Explain them with suitable diagrams 6

b) How to you decide the fuel injection pressure? How to achievethe required fuel injection pressure 6

UNIT-II

3. a) What are the factors influencing the carburetion? How to achievethe required air fuel mixture using carburetor 6

b) Explain the faults, causes and remedies of fuel injectors of dieselengine 6

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OR

4. a) What are the main requirements of fuel injection nozzles?Explain them 6

b) How does the electrical diaphragm pump works? Explain with

the diagram 6UNIT-III

5. a) What are the major components subjected to friction? Andhow does this friction can be minimized? Explain 6

b) Draw the thermo siphon water cooling system and explain theadvantages and limitations over other cooling systems 6

OR

6. a) Describe the working of battery ignition system used for theignition of charge in SI Engine 6 b) What is the difference between ignition timing and firing order?

Explain 3c) Differentiate between hot spark plug and cold spark plug 3

UNIT-IV

7. a) Draw the frameless construction of chassis and explain the

salient features 6 b) Explain the clutch actuating mechanism used for the operation

clutch 6OR

8. a) Draw the schematic diagram of sliding mesh gear box andexplain how to achieve the required speeds 6

b) What are the advantages of automatic transmission? Explain 6

UNIT-V9. a) Derive the fundamental equation for correct steering of steering

gear mechanism 6 b) What are the major requirements for hydraulic brake fluids for

better braking 6

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OR

10. a) What is steering arm? On what factors does its exact lengthdepend? Explain 6

b) What are different materials used for brake shoes and brake

liners? Explain their significance 6

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