Reg No.:

Max. Marks: 100

10

0000010103

Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

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Course Code: AU303
Course Name: FUELS AND COMBUSTION

PARTA
Answer any three full questions, each carries 10 marks.
How fuels are classified? Explain.

What are the different types of rating of fuels?
What is the importance of Octane rating on the combustion of fuel?
What are the desirable properties of an SI engine fuel?
What are the various stages of combustion in SI engines? Explain the
importance of each.
What are the various engine variables affecting the combustion?
What are the various factors affecting knock and surface ignition?
PART 13

Answer any three full questions, each carries 10 marks.

What is diesel knock? What is the effect of direct and indirect combustion on

diesel knock?
What is the importance of intercooling in turbocharging?
How turbocharging system works in diesel engine? Explain with the help of a
sketch.
What are the limitations of using vegetable oil in diesel engines? Explain.
What is B20? How it can be obtained? Explain.
What is the effect of bio diesel on Combustion? What are the methods to reduce
the emissions from bio diesel?
PART C

Answer any four full questions, each carries 10 marks.

What are the methods of production of ethanol? Why ethanol is added to

gasoline? Explain.

What are the essential systems needed in FFV? Why it is needed? Explain.

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Duration: 3 Hours

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