JNTU Exam Papers Automobile Engineering I Sem Nov 2008

JNTU Exam Papers

Automobile Engineering I Sem Nov 2008

SET-4

1. (a) What are different engines used in Marine applications? Explain.

(b) Analyse the hydro electric power generation unit. [8+8]

 

2. (a) Draw P-V and T-S diagrams S.I Engine and explain its working.

(b) Is it feasible to construct a sterling engine. Explain in detail. [8+8]

 

3. (a) Differentiate between crank shaft and cam shaft?

(b) Draw the schematic diagram of crank shaft for multi cylinder engine and

explain salient features. [8+8]

 

4. (a) How to minimize the leakage of gases from the engine cylinder through the

valve ports while valves are closed ? Explain .

(b) Draw the diagram of Crank case ? What are different components accomodated in crank case? [8+8]

 

5. (a) What is atomisation? How can it be achieved in petrol engines?

(b) A fan cylinder fan stroke square engine running at 40 rps has a carburetor

venture with a 3 cm throat. Assuming the bar diameter to be 10 cm, volumeter efficiency of 75%, density of air is 1.15and coefficient of air flow D is 0.75, calculate the suction at throat and mass flow rate of air. [6+10]

 

6. (a) Classify different fuel delivery systems for petrol engines? Explain.

(b) What are different problems faced by fuel transfer pump? Explain methods to rectify them. [8+8]

 

7. (a) Write the differences between mechanical fuel injector and pneumatic fuel

injector.

(b) Discuss the effect of pressure of oil pneumatic in to the combustion chamber.

[8+8]

 

8. (a) What are the objectives of lubrication in automobile engines? Explain.

(b) How two stroke engines are lubricated? Explain with a suitable diagram.

[8+8]

Leave a Comment