Automobile engine-1
Previous year question paper with solutions for Automobile engine-1 May-2017
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Question paper 1
SECTION-A
Q1. Fill in the blanks.
(a) The diameter of engine cylinder is called………
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(b) Cycle on which petrol engine works………..
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(c) Scavenging efficiency of ……. stroke engine is more.
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(d) ……….. is the power produced inside the engine.
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(e) The firing order of 4 cylinder engine is usually……..
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(f) Piston rings are usually made of ………
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(g) ……….. system of lubrication is used almost in modern car engine.
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(h) Ratio of ……….. and heat input is called thermal efficiency.
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(i) ……….test is used for determining mechanical efficiency of an engine.
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(j) During idling …….. mixture is required.
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SECTION-B
Q2. Attempt any five Questions.
i. Discuss briefly the working principle of 4 stroke petrol engine
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ii. Explain briefly the function and material of piston, connecting rod and crank shaft.
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iii. What do you mean by mechanical efficiency, thermal efficiency, volumetric efficiency and relative efficiency?
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iv. Discuss the comparison of MPFI system with carburetor method.
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v. Discuss the types of ignition systems .Explain any one.
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vi. Describe the function and working of thermostat and pressure cap used in cooling system.
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vii. Describe briefly pressure lubrication system.
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viii. How is the seizing of piston caused
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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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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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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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