B.E-B.E Automobile Engineering 5th Sem 080190008-AUTOMOTIVE FUELS AND LUBRICANTS(Anna University Chennai-2013)
B.E/B.TECH. DEGREE EXAMINATION, MAY/JUNE 2013
Fifth Semester
Automobile Engineering
080190008-AUTOMOTIVE FUELS AND LUBRICANTS
(Regulation 2008/2010)
PART A-(10*2=20 marks)
1.State the purpose of adding additives in a lubricant.
2.What are the advantages of gaseous fuel.
3.Draw the chemical structure of methane and ethane.
4.Give the composition of Gasohol.
5.What do you mean by dry analysis?
6.What is the reason for adding KOH solution in the orsat apparatus?
7.What is viscous friction?
8.List out the various frictional losses in an engine.
9.What is the purpose of antioxidants?
10.Define viscosity index.
PART B-(5*16=80 marks)
11.(a) Give the general chemical formula of the following fuels
(i) Paraffin
(ii) Olefin
(iii) Diolefine
(iv) Napthene
(v) Aromatic
Also explain their molecular arrangement.
Or
(b) What is the composition of crude oil? Explain the principle involved in fractional distillation of crude oil. Mention the various fractions obtained in this process and their industrial uses.
12.(a) Explain the important qualities of SI engine fuels.
Or
(b) Describe with neat sketch the following calorimeters used for determination of heating values.
(i) Bomb calorimeter
(ii) Junkers gas calorimeter
13.(a) Enumerate the method by which air-fuel ratio can be calculated when analysis of combustion product is known.
Or
(b) Calculate the amount of theoretical air required for combustion of 1 Kg of acetylene (C2H2) to Co2 and H2O .
14.(a) What are the various components to be lubricates in an engine and explain how it is accomplished.
Or
(b) Clearly explain the various wet sump lubrication system. Compare the wet sump and dry sump lubrication system.
15.(a) What are the various desired properties of a lubricant and explain how do additives help to achieve the desired properties.
Or
(b) List out the desirable properties of lubricants and explain them in detail.
| Earning: ₹ 8.70/- |
