previous question papers

1. Code: 13D11105
M.Tech I Semester Supplementary Examinations September/October 2015
FUELS & COMBUSTION TECHNOLOGY
(Thermal Science & Energy Systems)
(For students admitted in 2013 & 2014 only)
Time: 3 hours Max. Marks: 60
Answer any FIVE questions
All questions carry equal marks
*****
1 (a) Discuss the different factors that are responsible for the efficient production of biogas.
(b) Explain with the help of biological reactions the production of biogas.
2 (a) What do you understand by the word “Briquetting of solid fuels”?
(b) What is coal carbonization? Explain in detail the coal preparation method.
3 (a) Explain the procedure for storage and handling of liquid fuels.
(b) What are the important petroleum products? List out the various applications of the petroleum
products.
4 (a) H2 is considered as a most promising fuel for air-craft. Comment.
(b) Discuss the different methods to be used to supply H2 if it used in petrol engines.
5 (a) Discuss in detail the different theories of combustion.
(b) What do you understand by combustion thermodynamics? Discuss.
6 The gas analysis of a diesel engine exhaust carried out by Orsat apparatus is CO2 = 7.5%, O2 =
9.4%, CO = 1%. Determine:
(a) A : F ratio used (by mass)
(b) The mass analysis of the fuel
Air contains 21% of O2 and 79% of N2 by volume and air molecular weight = 29. Assume fuel is
purely hydro – carbon.
7 (a) List the different types of furnaces. Explain in detail batch & continues furnaces with a neat
sketch.
(b) List out the advantages and disadvantages of ceramic coating to furnaces.
8 With a neat sketch explain the following in detail:
(a) Open hearth furnace and kilns.
(b) Pot & crucible furnaces.
*****