Title

: UPSC ESE 2023 : Mechanical Engineering Chapter Wise & Year Wise Solved Papers 2000-2022

Language

: English

Editor’s Name : Vinit Garg Copyright ©

: 2022 CLIP

No part of this book may be reproduced in a retrieval system or transmitted, in any form or by any means, electronics, mechanical, photocopying, recording, scanning and or without the written permission of the Author/Publisher. Typeset & Published by : Career Launcher Infrastructure (P) Ltd. A-45, Mohan Cooperative Industrial Area, Near Mohan Estate Metro Station, New Delhi - 110044 Marketed by : G.K. Publications (P) Ltd. Plot No. 9A, Sector-27A, Mathura Road, Faridabad, Haryana-121003 ISBN : 978-93-94168-00-8 Printer’s Details : Printed in India, New Delhi. For product information : Visit www.gkpublications.com or email to [email protected]

Engineering Services Examination (ESE) is a combined three-stage examination conducted by the UPSC for recruitment to Indian Engineering Services (IES). Every year a large number of candidates appear for this exam, competing for a limited number of posts. Thus ESE is considered as one of the toughest exam in India due to its low selection ratio and technical nature. Unlike before, the ESE 2017 pattern and syllabus has been completely changed. The old pattern consisted of three stages wherein the candidates were allowed to attempt all the stages. But the revised pattern includes three stages - prelims, mains and personality test, the candidate is required to qualify each stage in order to move on to the next stage. The prelims stage includes two papers – paper 1 for general studies & engineering aptitude and paper 2 for technical ability, in which both papers are objective type. Here the paper 1 is common for all the branches, whereas paper 2 is based on the candidate’s respective discipline. The second stage - mains is again divided into two papers wherein both are conventional type to test the technical ability of respective engineering discipline. GK Publications has been the ‘‘publisher of choice’’ to students preparing for GATE, ESE and other technical test prep examinations in the country. GKP's ESE 2022 series provides a wide range of study material which is classified into 13 books, with 5 guides, 4 objective paper books and 4 conventional paper books to simplify the entire preparation. These books have been thoroughly updated as per the latest pattern and syllabus to provide everything you need to perfect your score. GKP has also launched an android app to provide you an update on all upcoming vacancies in the technical segment and it also has a lot of added content to aid your preparation. We hope this little effort of ours will be helpful in achieving your dreams. If you have any suggestions on improvement of this book, you can write to us at [email protected]. All the Best! Team GKP

 Syllabus  Exam Pattern

Solved Papers P aper I 1. Fluid Mechanics

1.1-1.92

– Questions

1.1

– Answers

1.60

– Explanations

1.62

2. Thermodynamics and Heat Transfer

2.1-2.88

– Questions

2.1

– Answers

2.55

– Explanations

2.57

3. IC Engines, Refrigeration and Air Conditioning – Questions

3.1-3.60 3.1

– Answers

3.40

– Explanations

3.41

4. Power Plant Engineering

4.1-4.52

– Questions

4.1

– Answers

4.39

– Explanations

4.40

Paper II 5. Engineering Mechanics – Questions

5.1-5.52 5.1

– Answers

5.30

– Explanations

5.31

6. Engineering Materials – Questions

6.1-6.30 6.1

– Answers

6.23

– Explanations

6.24

7. Mechanisms and Machines – Questions

7.1

– Answers

7.37

– Explanations

7.38

8. Design of Machine Elements – Questions

8.1-8.34 8.1

– Answers

8.23

– Explanations

8.23

9. Manufacturing, Industrial and Maintenance Engineering – Questions



7.1-7.54

9.1-9.94 9.1

– Answers

9.67

– Explanations

9.69

Solved Paper 2016 – Objective Paper I

1-22

– Objective Paper II

1-18



Solved Paper 2017

1-27



Solved Paper 2018

1-22



Solved Paper 2019

1-28



Solved Paper 2020

1-33



Solved Paper 2021

1-30



Solved Paper 2022

1-46

PAPER - I 1. Fluid Mechanics: Basic Concepts and Properties of Fluids, Manometry, Fluid Statics, Buoyancy, Equations of Motion, Bernoulli's equation and applications, Viscous flow of incompressible fluids, Laminar and Turbulent flows, Flow through pipes and head losses in pipes. 2. Thermodynamics and Heat Transfer: Thermodynamic systems and processes; properties of pure substance; Zeroth, First and Second Laws of Thermodynamics; Entropy, Irreversibility and availability; analysis of thermodynamic cycles related to energy conversion: Rankine, Otto, Diesel and Dual Cycles; ideal and real gases; compressibility factor; Gas mixtures. Modes of heat transfer, Steady and unsteady heat conduction, Thermal resistance, Fins, Free and forced convection, Correlations for convective heat transfer, Radiative heat transfer - Radiation heat transfer coefficient; boiling and condensation, Heat exchanger performance analysis. 3. IC Engines, Refrigeration and Air Conditioning: SI and CI Engines, Engine Systems and Components, Performance characteristics and testing of IC Engines; Fuels; Emissions and Emission Control. Vapour compression refrigeration, Refrigerants and Working cycles, Compressors, Condensers, Evaporators and Expansion devices, Other types of refrigeration systems like Vapour Absorption, Vapour jet, thermo electric and Vortex tube refrigeration. Psychometric properties and processes, Comfort chart, Comfort and industrial air conditioning, Load calculations and Heat pumps. 4. Turbo Machinery: Reciprocating and Rotary pumps, Pelton wheel, Kaplan and Francis Turbines, velocity diagrams, Impulse and Reaction principles, Steam and Gas Turbines, Theory of Jet Propulsion - Pulse jet and Ram Jet Engines, Reciprocating and Rotary Compressors - Theory and Applications. 5. Power Plant Engineering: Rankine and Brayton cycles with regeneration and reheat, Fuels and their properties, Flue gas analysis, Boilers, steam turbines and other power plant components like condensers, air ejectors, electrostatic precipitators and cooling towers - their theory and design, types and applications. 6. Renewable Sources of Energy: Solar Radiation, Solar Thermal Energy collection - Flat Plate and focusing collectors their materials and performance. Solar Thermal Energy Storage, Applications - heating, cooling and Power Generation; Solar Photovoltaic Conversion; Harnessing of Wind Energy, Bio-mass and Tidal Energy - Methods and Applications, Working principles of Fuel Cells.

PAPER - II 1. Engineering Mechanics: Analysis of System of Forces, Friction, Centroid and Centre of Gravity, Dynamics; Stresses and Strains-Compound Stresses and Strains, Bending Moment and Shear Force Diagrams, Theory of Bending Stresses-Slope and deflection-Torsion, Thin and thick Cylinders, Spheres. 2. Engineering Materials: Basic Crystallography, Alloys and Phase diagrams, Heat Treatment, Ferrous and Non Ferrous Metals, Non metallic materials, Basics of Nano-materials, Mechanical Properties and Testing, Corrosion prevention and control. 3. Mechanisms and Machines: Types of Kinematics Pair, Mobility, Inversions, Kinematic Analysis, Velocity and Acceleration Analysis of Planar Mechanisms, CAMs with uniform acceleration and retardation, cycloidal motion, oscillating followers; Vibrations -Free and forced vibration of undamped and damped SDOF systems, Transmissibility Ratio, Vibration Isolation, Critical Speed of Shafts. Gears - Geometry of tooth profiles, Law of gearing, Involute profile, Interference, Helical, Spiral and Worm Gears, Gear Trains- Simple, Compound and Epicyclic; Dynamic Analysis - Slider - crank mechanisms, turning moment computations, balancing of Revolving & Reciprocating masses, Gyroscopes - Effect of Gyroscopic couple on automobiles, ships and aircrafts, Governors.

4. Design of Machine Elements: Design for static and dynamic loading; failure theories; fatigue strength and the S-N diagram; principles of the design of machine elements such as riveted, welded and bolted joints. Shafts, Spur gears, Rolling and sliding contact bearings, Brakes and clutches, flywheels. 5. Manufacturing, Industrial and Maintenance Engineering: Metal casting-Metal forming, Metal Joining, Machining and machine tool operations, Limits, fits and tolerances, Metrology and inspection, computer Integrated manufacturing, FMS, Production planning and Control, Inventory control and operations research - CPM-PERT. Failure concepts and characteristics-Reliability, Failure analysis, Machine Vibration, Data acquisition, Fault Detection, Vibration Monitoring, Field Balancing of Rotors, Noise Monitoring, Wear and Debris Analysis, Signature Analysis, NDT Techniques in Condition Monitoring. 6. Mechatronics and Robotics: Microprocessors and Microcontrollers: Architecture, programming, I/O, Computer interfacing, Programmable logic controller. Sensors and actuators, Piezoelectric accelerometer, Hall effect sensor, Optical Encoder, Resolver, Inductosyn, Pneumatic and Hydraulic actuators, stepper motor, Control Systems- Mathematical modeling of physical systems, Control signals, Controllability and observability. Robotics, Robot classification, Robot Specification, notation; Direct and Inverse Kinematics; Homogeneous Coordinates and Arm Equation of four Axis SCARA Robot.

Stage-I

Objective Type Papers (Preliminary/Stage-I)

Marks

Time

Paper-I

General Studies and Engineering Aptitude Paper

200

2 hours

Paper-II

Engineering Discipline-specific Paper

300

3 hours

Sub-Total

500

Fluid Mechanics

1

1.1

Fluid Mechanics

C HAPTER 2015

(a) 0.3 bar or 4.077 m of water or 0.29 m of Hg

1. A fin will be more effective when Bio number is

(b) 4 bar or 5.077 m of water or 0.399 m of Hg (c) 0.3 bar or 5.077 m of water or 0.599 m of Hg

(a) Greater than 1

(d) 4 bar or 4.077 m of water or 0.299 m of Hg

(b) Equal to 1

7. Consider the following statements:

1 3 and 4 4 (d) Less than 1

(c) Between

2. In a convergent divergent nozzle, the velocity at throat of nozzle is given by 1

ª 2np1 v1 º 2 (a) V = « » ¬ n –1 ¼ 1

(c) V = > 2np1 v1 @ 2

1

ª 2np1 v1 º 2 (b) V = « » ¬ n 1 ¼ 1

(d) V = > np1 v1 @2

where p 1 = initial entry pressure, v 1 = initial entry specific volume and n = isentropic index of expansion 3. A tank of length, breadth and height in the ratio of 2 : 1 : 2 is full of water. The ratio of hydrostatic force at the bottom to that at any larger vertical surface is (a) 1

(b) 4

(c) 2

(d) 3

4. Which of the following fluids exhibit a certain shear stress at zero shear strain rate followed by a straight line relationship between shear stress and shear strain rate? (a) Newtonian fluids (b) Ideal Bingham plastic fluids (c) Pseudo-plastic fluids (d) Dilatent fluids 5. What is the specific gravity of a marble stone, which weighs 400 N in air, and 200 N in water? (g = 10 m/s2) (a) 8

(b) 6

(c) 4

(d) 2

6. What is the intensity of pressure in the following SI units, when specific gravity of mercury is 13.6 and the intensity of pressure is 400 KPa?

1. If a small upward displacement is given to a floating body, it results in the reduction of the buoyant force acting on the body 2. A slight horizontal displacement does not change either the magnitude or the location of the buoyant force Which of the above statements is/are correct? (a) Both 1 and 2

(b) 1 only

(c) 2 only

(d) Neither 1 nor 2

8. State whether following flow field is physically possible? u = 3xy2 + 2x + y2 and v = x2 – 2y – y3 (a) Possible for steady, incompressible flow (b) Possible for unsteady, incompressible flow (c) Possible for steady, compressible flow (d) Not possible 9. A steady incompressible flow field is given by u = 2x2 + y2 and v = –4xy. The convective acceleration along x-direction at point (1, 2) is (a) 6 units

(b) 24 units

(c) –8 units

(d) –24 units

10. Consider the following remarks pertaining to the irrotational flow: 1. The Laplace equation of stream function w 2\ w 2\  = 0 must be satisfied for the flow wx 2 wy 2 to be potential. 2. The Laplace equation for the velocity potential w 2I w 2I  = 0 must be satisfied to fulfill the wx 2 wy 2 criterion of mass conservation i.e. continuity equation. Which of the above statements is/are correct? (a) 1 only

(b)

Both 1 and 2

(c) 2 only

(d) Neither 1 nor 2

1.2

Fluid Mechanics

11. In a two dimensional incompressible fluid flow field, the stream function at a point P(2, 1) is given by an expression < = 2xy. The value of velocity potential at P is

18. A fluid is flowing over a flat plate. At distance of 8 cm from the leading edge, the Reynolds number is found to be 25600. The thickness of the boundary layer at this point is

(a) 3

(b) 2.5

(a) 1.5 mm

(b) 2.5 mm

(c) 4

(d) 5

(c) 4.0 mm

(d) 5.0 mm

12. In a stream line steady flow, two points A and B on a stream line are 1 m apart and the flow velocity varies uniformly from 2 m/s to 5 m/ s. What is the acceleration of fluid at B? (a) 3 m/s2

(b) 6 m/s2

(c) 9 m/s2

(d) 15 m/s2

13. The stream function is given by