Solved question paper for AE-1 May-2017 (DIPLOMA automobile engineering 3rd)

Automobile engine-1

Previous year question paper with solutions for Automobile engine-1 May-2017

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Question paper 1

  1. SECTION-A

    Q1. Fill in the blanks.

    (a) The diameter of engine cylinder is called………

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  2. (b) Cycle on which petrol engine works………..

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  3. (c) Scavenging efficiency of ……. stroke engine is more.

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  4. (d) ……….. is the power produced inside the engine.

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  5. (e) The firing order of 4 cylinder engine is usually……..

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  6. (f) Piston rings are usually made of ………

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  7. (g) ……….. system of lubrication is used almost in modern car engine.

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  8. (h) Ratio of ……….. and heat input is called thermal efficiency.

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  9. (i) ……….test is used for determining mechanical efficiency of an engine.

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  10. (j) During idling …….. mixture is required. 

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  11. SECTION-B

    Q2. Attempt any five Questions.

    i. Discuss briefly the working principle of 4 stroke petrol engine

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  12. ii. Explain briefly the function and material of piston, connecting rod and crank shaft.

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  13. iii. What do you mean by mechanical efficiency, thermal efficiency, volumetric efficiency and relative efficiency?

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  14. iv. Discuss the comparison of MPFI system with carburetor method.

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  15. v. Discuss the types of ignition systems .Explain any one.

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  16. vi. Describe the function and working of thermostat and pressure cap used in cooling system.

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  17. vii. Describe briefly pressure lubrication system.

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  18. viii. How is the seizing of piston caused

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  19. Q3. Attempt any two Questions.

    i. Describe the working principle of 2- stroke petrol engine. Also explain in detail the difference between petrol engine and diesel engine.

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  20. ii. Describe the requirement of air-fuel mixture for different speeds of an engine. Also explain the different operating systems in complete carburetor.

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  21. iii. What is the necessity of cooling system and lubrication system? Explain the characteristics/properties of lubricants required for automobile engine.

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