Table Of ContentACING THE GATE
WILEY
MECHANICAL ENGINEERING
ACING THE GATE
WILEY
MECHANICAL ENGINEERING
Ajay Kumar Tamrakar
B.E. (GEC, Rewa), M.Tech (IISc)
Senior Divisional Mechanical Engineer
West Central Railway, Jabalpur, MP
Dineshkumar Harursampath
B.Tech (IITM), M.E. (IISc), Ph.D. (GeorgiaTech)
Assistant Professor and Head, NMCAD Lab
Department of Aerospace Engineering
Indian Institute of Science, Bangalore
ACING THE GATE
WILEY
MECHANICAL ENGINEERING
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First Edition: 2014
ISBN: 978-81-265-4542-1
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PREFACE
The Graduate Aptitude Test in Engineering (GATE) essentially examines the aptitude of an engineering graduate.
It differs from other examinations as it calls for an aptitude based learning and approach on engineering topics.
However,theaspirantsfacedifficultiesinpreparationforthisexaminationduetovariouscomplications,suchashuge
syllabus, unavailability of standard books and trusted texts, existing incongruity with syllabus and approach of the
competition, lackofcompetentteachers. Toqualifythisexam, anaspirantshouldhaveperfectunderstandingonthe
fundamentals concepts, and requires ability to interpret the fundamental quantities and their relationships. Purpose
of this book is to present the subjects of mechanical engineering in a systematic, integrated and precise manner,
primarily to meet the requirements of the aspirants of GATE (ME) and to truly help them qualify the examination
without unreasonable strains. The book is a self-explanatory and fully-competent text which is equally useful for
similar competitions and undergraduate courses in mechanical engineering.
The book starts with two introductory articles, “Methodological Concepts in Engineering Studies” and “Strategy
for success in GATE”. Each chapter in the manuscript begins with an overview of the content and introduces topics
from a level that an average student can follow comfortably. Using easily perceptible language, standard symbols,
figures and tables, the book describes various concepts, definitions, and derivations, in a much elucidated text, like
a tutor. The book contains almost every mathematical aspect of the subjects with the help of illustrations and by
highlighting the implicit path, thus, stimulating curiosity and interest. A summary of important formulas is placed
after the theoretical contents in every chapter to provide a quick review of the useful derivations. Solved examples
are included to amply demonstrate the theoretical concepts. Each chapter is provided with solutions of previous 11
years’ GATE questions (2003–2013). Each chapter also contains rightly answered and explicitly explained Multiple
Choice Questions (MCQ’s) and Numerical Answer Questions (NAQ’s), which are specifically designed to meet the
latest pattern and standard of GATE. These questions cover the topics from simplest case and add complexities
gradually. The explanations of the questions amply illustrate the topics in a very appealing way. A solved question
bank with mixed topics is also placed at the end of the book.
Thebookincorporateseverysentenceofimportanceandavoidsundesirablerepetition. Throughoutthecontent,an
intuitiveandsystematicapproachisusedtoreinforcethefundamentalunderstandings. Theemphasisonfundamental
concepts unveils the inbuilt opportunities for developing the aptitude, the vital element for success in GATE.
Despite our best efforts, some errors may have inadvertently crept in the book, we solicit your feedback and
suggestions for improvement.
Ajay Kumar Tamrakar
Dineshkumar Harursampath
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ACKNOWLEDGMENTS
To a mother, who is but a manifestation of the Divine virtues of the Earth, this book is one petite offering. Thank
you Amma for being my mother! Thank you Papa for all the liberty, confidence and the discipline showered on me.
Thanks to Kiran and Gudiya (my sisters), Amit (my brother), Akash (Kiran’s son) for all the care, love and pride.
Thanks to my wife, Deepti, for unflinching support to all my endeavors. Her parents, and Divya, Deepika, Disha
(sisters-in-law) own equal gratitude from my side for all their pride for me and for the implicit encouragement.
I always seem to get inspiration and renewed vitality by contact with great novel land of my alma mater, Indian
Institute of Science, Bangalore, where I enjoyed the privilege of studying with as Dr. Dineshkumar Harursampath,
the co-author of this book. It is my proud privilege to express my deep sense of gratitude to him for constant
encouragements and invaluable contributions in this book. This project worked as the golden way through which I
could return myself to such a venerable teacher.
I must also submit my gratitude to Wiley India for considerately accepting the initial proposal of the book
which was totally different in pattern and orientation. In spite of busy schedule, Ms. Anjali Chadha and Ms. Sruthi
Guru studied the script meticulously and persistently provided support, feedback and inquiries to finally convert
the proposal into present book. I am indebted to Mr. Paras Bansal of Wiley India for giving me the opportunity of
becoming an author of the publication of such a high repute.
Last and not least, I beg forgiveness of all those who have been with me over the course of the years and whose
names I have failed to mention.
Ajay Kumar Tamrakar
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