ர 00000AU303121902 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth semester B.Tech degree examinations (S) September 2020

Course Code: AU303
Course Name: FUELS AND COMBUSTION
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three full questions, each carries 10 marks. Marks
1 Give an account on the qualities and requirements for a good SI engine fuel. (10)
2 Illustrate and explain the refining process of crude oil and the products obtained. (10)
3 Explain on the various stages of combustion in a SI engine using ೩ 0-0 diagram. (10)
4 List and explain the principles in designing a good combustion chamber for an
51 engine. 0
PART ‏تا‎
‎Answer any three full questions, each carries 10 marks.
5 Expound on the phenomenon of knock in CI engines and compare it with SI
engine knock. 00
6 9७) Why supercharging is not widely used in SI engines? (2)
b) Draw and describe any two types of Super chargers. (8)
7 a) What are the challenges in using vegetable oils as a fuel in IC engines? (2)
b) Compare the Exhaust Emission characteristics of vegetable oils with that of
Diesel. (8)
8 Compare the performance characteristics of CI engines using Vegetable oils and
petroleum Diesel. ™
PART C
Answer any four full questions, each carries 10 marks.
9 ച What is the concept of FFV? (2)
b) Explain any two production methods for Ethanol. (8)
10 Compare the performance characteristics of SI engines using Alcohols and
petrol. ”
11 Explain various methods of using alcohols as fuel in IC engines. (10)

Page 1 of 2