IES GATE PSUs

MechanicalenGineeRinG

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Multiple Choice QuestionsFor

5200Fully Solved

Multiple Choice Questions

MADE EASY Publications

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Multiple Choice Questions for IES, GATE, PSUs : Mechanical EngineeringCopyright 2014, by MADE EASY Publications.All rights are reserved. No part of this publication may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photo-copying, recording or otherwise), without the prior written permission of the above mentioned publisher of this book.

First Edition: 2014ISBN: 978-93-83643-19-6

Published by: MADE EASY Publications, New Delhi-110016

Preface

It gives me great happiness to introduce this book on Mechanical

Engineering containing nearly 5200+ MCQs which focuses in-depth

understanding of subjects at basic and advanced level which has been

segregated topic-wise to disseminate all kind of exposure to students

in terms of quick learning and deep apt. The chapter wise segregation

has been done to align with contemporary competitive examination

pattern. Attempt has been made to bring out all kind of probable competitive questions

for the aspirants preparing for IES, GATE, PSU. The content of this book ensures threshold

level of learning and wide range of practice questions which is very much essential

to boost the exam time confidence level and ultimately to succeed in all prestigious

engineers examinations. It has been ensured from made easy team to have broad

coverage of subjects at chapter level.

Year by year number of competitors are increasing and the variety of questions asked

in examination is widening, under such scenario this book will definitely help students

to enhance their skills required to succeed in competitive exams like IES, GATE, PSUs,

State Engineering Services etc.

While preparing this book utmost care has been taken to cover all the chapters and

variety of concepts which may be asked in the exams. The solutions and answers

provided are upto the closest possible accuracy. The full efforts have been made by

MADE EASY Team to provide error free solutions and explanations.

I have true desire to serve student community by way of providing good sources of study

and quality guidance. I hope this book will be proved an important tool to succeed in

competitive examinations. Any suggestions from the readers for the improvement of

this book are most welcome.

B. Singh (Ex. IES)Chairman and Managing Director

MADE EASY Group

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1. ThErMoDYNAMICS ............................................................................................................11. Basic Concepts ................................................................................................................... 22. Temperature ........................................................................................................................ 83. Work and Heat Transfer .................................................................................................... 114. First Law of Thermodynamics ........................................................................................... 175. First Law Applied to Flow Process .................................................................................... 236. Second Law of Thermodynamics ..................................................................................... 267. Entropy .............................................................................................................................. 328. Availability & Irreversibility ................................................................................................ 399. Properties of Pure Substance ........................................................................................... 4210. Properties of Gases .......................................................................................................... 4511. Thermodynamic Relations ................................................................................................ 53

2. rEFrIGErATIoN & AIr CoNDITIoNING ..........................................................................601. Basics of Refrigerating Machine ....................................................................................... 602. Refrigeration Cycles & Systems ........................................................................................ 673. Refrigerants ....................................................................................................................... 844. Refrigerant Compressors .................................................................................................. 915. Condensers, Evaporators & Expansion Devices .............................................................. 946. Properties of Moist Air ....................................................................................................... 987. Psychrometric Chart & its Application to Air-Conditioning ............................................. 1058. Comfort Conditions ......................................................................................................... 1159. Solar Refrigeration .......................................................................................................... 11810. Air-duct Design ............................................................................................................... 120

3. hEAT AND MASS TrANSFEr ......................................................................................... 1251. Basic Concepts of Heat Transfer .................................................................................... 1252. One-Dimensional Steady-state Conduction .................................................................... 1313. Heat Dissipation from Extended Surface ........................................................................ 1444. Transient Heat Conduction.............................................................................................. 1485. Heat Transfer by Natural Convection .............................................................................. 1526. Heat Transfer by Forced Convection .............................................................................. 1567. Radiation Heat Transfer................................................................................................... 1618. Condensation and Boiling ............................................................................................... 1709. Heat Exchanger .............................................................................................................. 17410. Fundamentals of Diffusive & Convective Mass Transfer ................................................. 179

4. I.C. ENGINE ...................................................................................................................... 1821. Basics ............................................................................................................................. 1822. Air Standard Cycles ........................................................................................................ 1893. Conventional & Alternative Fuels .................................................................................... 1974. Fuel Injection, Ignition & Carburation .............................................................................. 2035. Combustion & Combustion Chambers ........................................................................... 2156. Supercharging ................................................................................................................ 2267. Engine Friction, Lubrication & Cooling ........................................................................... 2298. Engine Emissions & their Control .................................................................................... 2329. Testing & Performance .................................................................................................... 235

CoNTENTS

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5. FlUID MEChANICS ......................................................................................................... 2421. Properties of Fluids ......................................................................................................... 2422. Pressure and Its Measurement ....................................................................................... 2513. Hydrostatic Forces on Surfaces ...................................................................................... 2574. Buoyancy and Floatation ................................................................................................ 2635. Kinematics of Flow and Ideal Flow ................................................................................. 2686. Dynamic of Fluid Flow ..................................................................................................... 2767. Flow Over Notches and Weirs ........................................................................................ 2828. Viscous Flow ................................................................................................................... 2859. Turbulent Flow ................................................................................................................. 29110. Flow Through Pipes ........................................................................................................ 29411. Boundary Layer Theory .................................................................................................. 30012. Flow in Open Channel ..................................................................................................... 30713. Dimensional and Model Analysis .................................................................................... 31114. Forces on Submerged Bodies ........................................................................................ 31615. Flow of Compressible Fluids ........................................................................................... 319

6. PowEr PlANT ENGINEErING ...................................................................................... 3241. Fuels and Combustion .................................................................................................... 3242. Analysis of Steam Cycles ................................................................................................ 3293. Steam Generators ........................................................................................................... 3384. Steam Turbines ............................................................................................................... 3455. Nuclear Power Plants ...................................................................................................... 3616. Hydroelectric Power Plant ............................................................................................... 3667. Hydraulic Pump .............................................................................................................. 3748. Energy Transfer ............................................................................................................... 3829. Compressors ................................................................................................................... 38610. Gas Turbine Power Plants ............................................................................................... 39411. Jet and Rocket Propulsion System ................................................................................. 401

7. STrENGTh oF MATErIAlS ............................................................................................ 4061. Mechanical Properties of Materials ................................................................................. 4062. Stress-Strain Relations & Elastic Constants .................................................................... 4173. Tension, Compression and Shear ................................................................................... 4224. Torsion of Shafts .............................................................................................................. 4315. Shear Force and Bending Moment ................................................................................. 4406. Stresses in Beams .......................................................................................................... 4487. Analysis of Stress and Strain .......................................................................................... 4548. Deflection and Theories of Failure .................................................................................. 4639. Thin & Thick Walled Pressure Vessels ............................................................................ 47410. Struts and Columns ......................................................................................................... 48111. Helical Springs ................................................................................................................ 489

8. ThEorY oF MAChINES .................................................................................................. 4941. Mechanisms and Machines ............................................................................................ 4942. Velocity and Acceleration Analysis ................................................................................. 5043. Mechanism with Lower Pairs .......................................................................................... 5114. Cams ............................................................................................................................... 5155. Toothed Gearing ............................................................................................................. 5206. Gear Trains ...................................................................................................................... 5287. Static and Dynamic Force Analysis ................................................................................ 5348. Flywheels ........................................................................................................................ 5409. Balancing ........................................................................................................................ 546

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5. FlUID MEChANICS ......................................................................................................... 2421. Properties of Fluids ......................................................................................................... 2422. Pressure and Its Measurement ....................................................................................... 2513. Hydrostatic Forces on Surfaces ...................................................................................... 2574. Buoyancy and Floatation ................................................................................................ 2635. Kinematics of Flow and Ideal Flow ................................................................................. 2686. Dynamic of Fluid Flow ..................................................................................................... 2767. Flow Over Notches and Weirs ........................................................................................ 2828. Viscous Flow ................................................................................................................... 2859. Turbulent Flow ................................................................................................................. 29110. Flow Through Pipes ........................................................................................................ 29411. Boundary Layer Theory .................................................................................................. 30012. Flow in Open Channel ..................................................................................................... 30713. Dimensional and Model Analysis .................................................................................... 31114. Forces on Submerged Bodies ........................................................................................ 31615. Flow of Compressible Fluids ........................................................................................... 319

6. PowEr PlANT ENGINEErING ...................................................................................... 3241. Fuels and Combustion .................................................................................................... 3242. Analysis of Steam Cycles ................................................................................................ 3293. Steam Generators ........................................................................................................... 3384. Steam Turbines ............................................................................................................... 3455. Nuclear Power Plants ...................................................................................................... 3616. Hydroelectric Power Plant ............................................................................................... 3667. Hydraulic Pump .............................................................................................................. 3748. Energy Transfer ............................................................................................................... 3829. Compressors ................................................................................................................... 38610. Gas Turbine Power Plants ............................................................................................... 39411. Jet and Rocket Propulsion System ................................................................................. 401

7. STrENGTh oF MATErIAlS ............................................................................................ 4061. Mechanical Properties of Materials ................................................................................. 4062. Stress-Strain Relations & Elastic Constants .................................................................... 4173. Tension, Compression and Shear ................................................................................... 4224. Torsion of Shafts .............................................................................................................. 4315. Shear Force and Bending Moment ................................................................................. 4406. Stresses in Beams .......................................................................................................... 4487. Analysis of Stress and Strain .......................................................................................... 4548. Deflection and Theories of Failure .................................................................................. 4639. Thin & Thick Walled Pressure Vessels ............................................................................ 47410. Struts and Columns ......................................................................................................... 48111. Helical Springs ................................................................................................................ 489

8. ThEorY oF MAChINES .................................................................................................. 4941. Mechanisms and Machines ............................................................................................ 4942. Velocity and Acceleration Analysis ................................................................................. 5043. Mechanism with Lower Pairs .......................................................................................... 5114. Cams ............................................................................................................................... 5155. Toothed Gearing ............................................................................................................. 5206. Gear Trains ...................................................................................................................... 5287. Static and Dynamic Force Analysis ................................................................................ 5348. Flywheels ........................................................................................................................ 5409. Balancing ........................................................................................................................ 546

10. Governors ....................................................................................................................... 55111. Linear Vibration Analysis ................................................................................................. 558

9. MAChINE DESIGN .......................................................................................................... 5711. Design Against Static Load ............................................................................................ 5712. Design Against Fluctuating Load .................................................................................... 5783. Shafts, Keys and Couplings ............................................................................................ 5834. Threaded Joints and Power Screws ............................................................................... 5905. Welded and Riveted Joints ............................................................................................. 5986. Friction Clutches ............................................................................................................. 6077. Belt, Rope and Chain Drives ........................................................................................... 6138. Bearings .......................................................................................................................... 6209. Gears .............................................................................................................................. 629

10. MATErIAl SCIENCE ........................................................................................................ 6361. Structural of Metals and Alloys ....................................................................................... 6362. Equilibrium Diagrams & Phase Changes ........................................................................ 6433. Heat Treatment of Steels ................................................................................................. 6504. Plastics, Ceramics & Composite Materials ..................................................................... 6575. Mechanical Properties .................................................................................................... 6656. Engineering Alloys & its Common Applications .............................................................. 672

11. ProDUCTIoN ENGINEErING ........................................................................................ 6821. Casting Processes .......................................................................................................... 6822. Forming Processes ......................................................................................................... 6943. Powder Metallurgy .......................................................................................................... 7074. Metal Cutting and Tool Materials ..................................................................................... 7125. Machining Processes ...................................................................................................... 7266. Joining Processes ........................................................................................................... 7387. Unconventional Machining Process ............................................................................... 7498. Numerical Control of Machine Tools ............................................................................... 7549. Jigs and Fixtures ............................................................................................................. 75910. Fits and Tolerance ........................................................................................................... 76111. Metrology ........................................................................................................................ 764

12. INDUSTrIAl ENGINEErING .......................................................................................... 7701. Plant Layout .................................................................................................................... 7702. Loading and Scheduling ................................................................................................. 7753. Assembly Line Balancing ............................................................................................... 7824. Product Development ..................................................................................................... 7855. Forecasting ..................................................................................................................... 7876. Break Even Analysis ....................................................................................................... 7927. Work Study ...................................................................................................................... 7968. Material Requirement Planning ....................................................................................... 8029. Quality Analysis and Control ........................................................................................... 80510. Inventory Control ............................................................................................................. 81011. PERT and CPM ............................................................................................................... 81712. Linear Programming ....................................................................................................... 82313. Transportation and Assignment Models ......................................................................... 82714. Queuing Theory .............................................................................................................. 83015. Value Engineering ........................................................................................................... 834

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