JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV AUTOMOBILE ENGINEERING Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
State the characteristics of good lubricating oil.
Answer
Good lubricating oil should possess high viscosity index, high thermal stability, good oxidation resistance, proper flash and fire points, and low pour point to ensure effective lubrication across varying operating temperatures.
List the functions of carburetor.
Answer
- Atomization of fuel into fine droplets.
- Vaporization of fuel for better combustion.
- Proper mixing of air and fuel in the required ratio for different engine loads and speeds.
Mention the importance of fan in the cooling system.
Answer
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Why the condenser is important in the ignition system?
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State the objectives of suspension systems.
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Illustrate the working principle of clutch.
Answer
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List out the applications of air brakes.
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What is the necessity of braking system?
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What are the main sources of pollutants from petrol engines?
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State the mechanism of formation of CO.
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Part B
Illustrate briefly various parts of an automobile with the help of simple sketch.
Answer
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Examine the working of SU carburetor with a neat sketch.
Answer
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Inspect the working of common rail injection system with neat sketch.
Answer
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Analyze the different types of automobile vehicles.
Answer
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Explain the working of the evaporative cooling system with neat sketch.
Answer
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Contrast a simplified working circuit for the lightening system of a car and discuss the same.
Answer
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Interpret the working of the electronic ignition using the contact triggers.
Answer
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Interpret the role of anti-freeze solutions in water cooling systems.
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Explain the working of the fluid fly wheel with a neat sketch.
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Select the procedure for the maintenance of shock absorber.
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Examine the working of the centrifugal clutch with a neat sketch.
Answer
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Discover the operating working principles involved in the independent suspension system.
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Discover the advantages and disadvantages of hydraulic brakes.
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Explain the working of (i) Worm and worm wheel steering gear (ii) Rack and pinion steering gear.
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Explain the Davis steering gear with a neat sketch.
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List the functions of the master cylinder in hydraulic brakes and discuss its working with neat sketch.
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Examine the mechanism in the formation of nitric oxide.
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Inspect the various national and international pollution standards implement for the automobile emissions.
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List the sources of evaporative emission in petrol engines? How can it be controlled?
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Interpret the properties of alcohols to be used as a fuel in automobiles.
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