GATE 2017 Electrical Engineering Previous Years’ Solved Question Papers

661 Pages·70.944 MB·English

by  Trishna Knowledge Systems

PREVIOUS YEARS’ SOLVED QUESTION PAPERS
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Dr. S.K. Mydhili, Assistant Professor (Senior Grade), SVS College of Engineering, Coimbatore,Tamil Nadu
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Dr. Umesh Kumar, Associate Professor, IIT Delhi, Hauz Khas, New Delhi
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Also Helpful for GAIL, BARC, HPCL, BHEL, ONGC, SAIL, DRDO & Other PSUs Also Helpful for GAIL, BARC, HPCL, BHEL, ONGC, SAIL, DRDO & Other PSUs Also Helpful for GAIL, BARC, HPCL, BHEL, ONGC, SAIL, DRDO & Other PSUs Also Helpful for GAIL, BARC, HPCL, BHEL, ONGC, SAIL, DRDO & Other PSUs Also Helpful for GAIL, BARC, HPCL, BHEL, ONGC, SAIL, DRDO & Other PSUs 1
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Size:203x254mm Spine: 24mm ISBN: 9789332576056 Title Sub Title Edition Authors / Editors Name With CD Red Band Territory line URL Price mQuest
GATE
Previous Years’
Solved Question Papers
Electrical Engineering
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Copyright © 2017 Trishna Knowledge Systems
Published by Pearson India Education Services Pvt. Ltd, CIN: U72200TN2005PTC057128,
formerly known as TutorVista Global Pvt. Ltd, licensee of Pearson Education in South Asia.
No part of this eBook may be used or reproduced in any manner whatsoever without the
publisher’s prior written consent.
This eBook may or may not include all assets that were part of the print version. The publisher
reserves the right to remove any material in this eBook at any time.
ISBN: 978-93-325-7605-6
eISBN 978-93-325-7862-3
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Contents
Preface vii
Syllabus: Electrical Engineering ix
Important Tips for GATE Preparation xi
Detailed Analysis of GATE 2016 Papers xiii
Solved Papers 2016 xvii
Detailed Analysis of GATE 2015 Papers lix
Solved Papers 2015 lxii
Unit 1: Electric Circuits and Fields 1.1
Chapter 1: Network Elements 1.3
Chapter 2: Network Graph 1.22
Chapter 3: Network Theorems 1.24
Chapter 4: Transient Response 1.33
Chapter 5: Sinusoidal Steady State Analysis 1.44
Chapter 6: Three-phase Circuits 1.60
Chapter 7: Two Port Networks 1.64
Chapter 8: Miscellaneous 1.69
Chapter 9: Fields 1.76
Unit 2: Signals and Systems 2.1
Chapter 1: CT and DT Signals 2.3
Chapter 2: LTI Systems (CT and DT) 2.7
Chapter 3: Periodic Signal: Fourier Series 2.24
Chapter 4: Signal Fourier Transform 2.32
Chapter 5: Sampling Theorem 2.35
Chapter 6: Signal: Laplace Transform 2.37
Chapter 7: DT Signal: Z-Transform 2.40
Chapter 8: Miscellaneous 2.42
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iv | Contents
Unit 3: Electric Machines 3.1
Chapter 1: DC Machines 3.3
Chapter 2: Transformers 3.18
Chapter 3: Induction Motors 3.44
Chapter 4: Synchronous Machines 3.67
Unit 4: Power Systems 4.1
Chapter 1: Transmission and Distribution 4.3
Chapter 2: Economics of Power Generation 4.28
Chapter 3: Symmetrical Components and Faults 4.34
Chapter 4: Power System Stability 4.48
Chapter 5: Protection 4.58
Chapter 6: Circuit Breaker 4.65
Chapter 7: Generating Stations 4.68
Chapter 8: Load Flows 4.70
Chapter 9: HVDC 4.78
Chapter 10: Per Unit System 4.80
Unit 5: Control Systems 5.1
Chapter 1: Basic Control Systems 5.3
Chapter 2: Signal Flow Graph and Block Diagram 5.6
Chapter 3: Stability 5.9
Chapter 4: Time Response Analysis 5.14
Chapter 5: Root Locus Diagram 5.26
Chapter 6: Frequency Response Analysis 5.32
Chapter 7: Controllers (or) Compensators 5.48
Chapter 8: State Space Analysis 5.51
Unit 6: Electrical and Electronics Measurements 6.1
Chapter 1: Fundamentals and Error Analysis 6.3
Chapter 2: Indicating Instruments 6.5
Chapter 3: Measurement of Voltage and Current 6.7
Chapter 4: Measurement of Resistance 6.15
Chapter 5: Bridge Measurement, Measurement of Induction and Capacitance 6.17
Chapter 6: Extension of Instrument Ranges 6.21
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Contents | v
Chapter 7: Potentiometer 6.22
Chapter 8: Measurement of Power and Energy 6.23
Chapter 9: Measurement of Phase and Frequency 6.32
Chapter 10: Potentiometric Recorders and Q-Meter 6.34
Chapter 11: Oscilloscope 6.36
Chapter 12: Electronic Multimeters and Digital Voltmeters 6.41
Chapter 13: Instrument Transformer 6.43
Unit 7: Digital Electronics and Microprocessors 7.1
Chapter 1: Number Systems and Code Conversions 7.3
Chapter 2: Boolean Algebra 7.4
Chapter 3: Logic Gates 7.5
Chapter 4: Combinational Digital Circuits 7.9
Chapter 5: Sequential Digital Circuits 7.14
Chapter 6: Semiconductor Memories 7.20
Chapter 7: Logic Gate Families 7.21
Chapter 8: A/D and D/A Converters 7.23
Chapter 9: Microprocessors 7.26
Unit 8: Analog Electronics 8.1
Chapter 1: Diode Circuit 8.3
Chapter 2: BJT and FET Biasing 8.13
Chapter 3: Small Signal Modeling and Analysis 8.23
Chapter 4: Frequency Response 8.28
Chapter 5: Operational Amplifiers and Applications 8.29
Chapter 6: Feedback Amplifiers and Oscillators 8.48
Chapter 7: Function Generator and 555 Timer 8.54
Unit 9: Power Electronics and Drives 9.1
Chapter 1: Basics and Power Semiconductor Devices 9.3
Chapter 2: AC–DC Converters 9.12
Chapter 3: DC–DC Converters 9.25
Chapter 4: DC–AC Converters 9.35
Chapter 5: AC–AC Converters 9.42
Chapter 6: Fundamentals of Drives 9.45
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Preface
Graduate Aptitude Test in Engineering (GATE) is an all India examination that primarily tests the comprehensive
understanding of the candidate in various undergraduate subjects in Engineering/Technology/Architecture and
postgraduate level subjects in Science. Owing to multifaceted opportunities open to any good performer, the
number of aspirants appearing for the GATE examination is increasing significantly every year. Apart from giving
the aspirant a chance to pursue an M.Tech from institutions such as the IITs /NITs, a good GATE score can be
highly instrumental in landing the candidate a plush public sector job, as many PSUs are recruiting graduate
engineers on the basis of their performance in GATE. The GATE examination pattern has undergone several
changes over the years—sometimes apparent and sometimes subtle. It is bound to continue to do so with changing
technological environment.
We are pleased to present the GATE Previous Years’ Solved Question Papers for Electrical Engineering which
is a one-stop solution for GATE aspirants to crack the GATE exam. The book includes more than 23 years’ GATE
questions segregated topic-wise along with exam analysis which is provided at the beginning of every unit. This
book helps the GATE aspirants to get an idea about the pattern and weightage of questions asked in GATE exami-
nation. The salient features of the book are given below.
Salient Features
☞ Includes more than 23 years’ GATE questions arranged chapter-wise.
☞ Detailed solutions for better understanding.
☞ Includes latest GATE solved question papers with detailed analysis.
☞ Includes free online mock test based on GATE examination pattern for practice.
Despite of our best efforts, some errors may have inadvertently crept into the book. Constructive comments and
suggestions to further improve the book are welcome and shall be acknowledged gratefully.
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Syllabus: Electrical Engineering
Electric Circuits
Network graph, KCL, KVL, Node and Mesh analysis, Transient response of dc and ac networks, Sinusoidal
steady state analysis, Resonance, Passive filters, Ideal current and voltage sources, Thevenin’s theorem, Norton’s
theorem, Superposition theorem, Maximum power transfer theorem, Twoport networks, Three phase circuits,
Power and power factor in ac circuits.
Electromagnetic Fields
Coulomb’s Law, Electric Field Intensity, Electric Flux Density, Gauss’s Law, Divergence, Electric field and potential
due to point, line, plane and spherical charge distributions, Effect of dielectric medium, Capacitance of simple
configurations, Biot Savart’s law, Ampere’s law, Curl, Faraday’s law, Lorentz force, Inductance, Magnetomotive
force, Reluctance, Magnetic circuits, Self and Mutual inductance of simple configurations.
Signals and Systems
Representation of continuous and discrete time signals, Shifting and scaling operations, Linear Time Invariant and
Causal systems, Fourier series representation of continuous periodic signals, Sampling theorem, Applications of
Fourier Transform, Laplace Transform and z-Transform.
Electrical Machines
Single phase transformer: equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation
and efficiency; Three phase transformers: connections, parallel operation; Auto transformer, Electromechanical
energy conversion principles, DC machines: separately excited, series and shunt, motoring and generating mode
of operation and their characteristics, starting and speed control of dc motors; Three phase induction motors:
principle of operation, types, performance, torque-speed characteristics, no-load and blocked rotor tests, equivalent
circuit, starting and speed control; Operating principle of single phase induction motors; Synchronous machines:
cylindrical and salient pole machines, performance, regulation and parallel operation of generators, starting of
synchronous motor, characteristics; Types of losses and efficiency calculations of electric machines.
Power Systems
Power generation concepts, ac and dc transmission concepts, Models and performance of transmission lines and
cables, Series and shunt compensation, Electric field distribution and insulators, Distribution systems, Perunit
quantities, Bus admittance matrix, GaussSeidel and Newton-Raphson load flow methods, Voltage and Frequency
control, Power factor correction, Symmetrical components, Symmetrical and unsymmetrical fault analysis,
Principles of over current, differential and distance protection; Circuit breakers, System stability concepts, Equal
area criterion.
Control Systems
Mathematical modeling and representation of systems, Feedback principle, transfer function, Block diagrams
and Signal flow graphs, Transient and Steady state analysis of linear time invariant systems, Routh-Hurwitz and
Nyquist criteria, Bode plots, Root loci, Stability analysis, Lag, Lead and Lead Lag compensators; P, PI and PID
controllers; State space model, State transition matrix.
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