JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II AUTOMOBILE ENGINEERING Previous Question Paper (November/December - 2017 - R13)
Part A is compulsory (25 marks). Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit (10 marks each).
Part A
Differentiate between chassis and frame in an automobile.
Answer
A frame is the rigid structural skeleton that supports the vehicle's components and load. A chassis refers to the complete assembly of the frame along with all functional systems like the engine, transmission, suspension, steering, and wheels, essentially representing the vehicle without the body.
Explain the term spark ignition.
Answer
Spark ignition is a process where the combustion of the air-fuel mixture in an internal combustion engine is initiated by an electric spark generated by a spark plug. This method is characteristic of gasoline engines, where the mixture is compressed and then ignited at a specific timing point to produce power.
Explain the need for a gearbox in an automobile.
Answer
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What is meant by suspension system in an automobile? Why is it required?
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Write a note on measures to control pollution from automobiles.
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Name the different components that form part of the chassis.
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Describe with a sketch the principle of working of an ignition coil.
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Mention the names of the different types of automobile gearboxes.
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Write a note on the lighting system in an automobile, in particular, a passenger car.
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Explain the meaning of exhaust manifold tuning.
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Part B
What are the defects that are normally found in chassis frame? Give examples.
Answer
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Explain the difference between the methods of fuels induction in SI engines and CI engines.
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Describe what happens when an automobile is not provided with adequate cooling.
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What are the problems encountered when an engine is over-cooled?
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What are the functions of an automobile clutch?
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Explain the need for a multi-plate clutch.
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Describe the working of a constant mesh gearbox with the help of a neat hand sketch.
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Compare and contrast a cone clutch and a plate clutch.
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Name the other types of clutches with which you are familiar. Describe any two of them.
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Prepare a neat schematic diagram of a hydraulic braking system of an automobile. Describe its operation.
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Explain the difference between the methods of fuel induction in SI engines and CI engines?
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Describe the principle involved in the functioning of a simple carburetor?
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Enumerate the functions of steering in automobiles.
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Explain Ackerman’s steering principle with a sketch.
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What are the typical constituents of automobile emissions and how are they harmful to the environment?
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