I am very much thankful to our Head of the department. Prof. S K BEHERA .I would also thank my seminar guide Prof. S S PATRA for providing me proper guidance. I would also thank the faculties of Mechanical Department for providing me the valuable information in my project topic and guiding me till completion of my seminar.

Lastly I would like to thank all of my friends who have directly or indirectly helped me to complete this seminar on time.

SAROJA KUMAR SWAIN MECHANICAL ENGG. 7TH SEM