JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV ALTERNATIVE FUELS FOR AUTOMOBILES Previous Question Paper (May - 2019 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
Write the consistent composition of CNG.
Answer
Compressed Natural Gas (CNG) primarily consists of methane (CH4), typically ranging from 85% to 95%. The remaining composition includes small amounts of ethane, propane, butane, and trace amounts of nitrogen, carbon dioxide, and hydrogen sulfide.
Explain about Lean burn CNG engines.
Answer
Lean burn CNG engines operate with an excess of air relative to the stoichiometric ratio, resulting in a lean mixture. This approach improves thermal efficiency and reduces nitrogen oxide (NOx) emissions by lowering peak combustion temperatures. However, it requires precise ignition control and advanced engine management systems to maintain stable combustion and prevent misfires under varying load conditions.
What are the LPG standards for vehicles?
Answer
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Explain the working details of LNG dispensers.
Answer
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What are the Hazards with liquid hydrogen?
Answer
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What is the meant by power density of Butanol?
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What are the advantages of EV controllers?
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What is the function of HEV ultra capacitors?
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How can you define the efficiency of fuel cell?
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Explain the road map for alternate power trains.
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Part B
Show the different components involved in the working of CNG engine and explain their working.
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Explain the material compatibility for CNG engine.
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What are the different CNG production methods and explain them along with CNG properties.
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Explain any one method of producing liquid Nitrogen and explain the properties of LN2.
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Explain each component working details of liquid Nitrogen operated vehicle with neat diagram.
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What are the advantages and limitations of liquid hydrogen as fuel in I.C engines?
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With line diagram and explain the Algal production of hydrogen (Bio hydrogen).
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Compare and contrast between Biogas and Bio fuels.
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Explain the specific design variations with Bio fuels and give the salient points.
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What are the advantages and limitations of electric vehicles in the Indian context.
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Explain the details of tractive force and drives of electric vehicles with line diagrams.
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What is meant by hybrid electric vehicles and explain its position in the Indian market?
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With the help of line diagrams, explain the working of hybrid electric vehicle batteries.
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Explain the Fuel cell vehicle working with schematic diagram and explain its fuel regulations.
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Draw the line diagram and explain the working of solar array car.
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Explain the working features of hybrid gas turbine electric vehicle and its limitations.
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