Junior Telecom Officers(Electrical)

Scheme and Syllabus for the Recruitment of Junior Telecom Officers(Electrical)
Examination - 2008

SCHEME

For direct recruitment of JTOs(Electrical), an objective type examination of one paper
of three hours duration consisting of following sections will be conducted :-
Section-I : Electrical Engineering : 50 questions
Section-II : Electrical Engineering : 50 questions
Section-III : General Awareness : 20 questions

The questions will be so designed as to assess the ability of the candidates to apply their
technical knowledge to the solution of the problems.

The syllabus for JTOs(Electrical) Paper will as given below.

SYLLABUS
SECTION-I - ELECTRICAL ENGINEERING

1. EM Theory
Electric and magnetic fields. Gauss's Law and Amperes Law. Fields in dielectrics,
conductors and magnetic materials. Maxwell's equations. Time varying fields. Plane-
Wave propagating in dielectric and conducting media. Transmission lines.

2. Electrical Materials
Band Theory, Conductors, Semi-conductors. and Insulators. Superconductivity.
Insulators for electrical and electronic applications. Magnetic materials. Ferro and ferri
magnetism. Ceramics, Properties and applications. Hall effect alJd its applications.
Special semi conductors.

Page 25 of 283. Electrical Circuits
Circuits elements. Kirchoff's Laws. Mesh and nodal analysis. Network Theorems and
applications. Natural response and forced response. Transient response and steady
state response for arbitrary inputs. Properties of networks in terms of poles and zeros.
Transfer function. Resonant circuits. Three phase circuits. Two-port networks.
Elements of two-element network synthesis.
4. Measurements and Instrumentation
Units and Standards. Error analysis, measurement of current, Voltage, power, Power-
factor and energy. Indicating instruments. Measurement of resistance, inductance,
Capacitance and frequency. Bridge measurements. Electronic measuring instruments.
Digital Voltmeter and frequency counter. Transducers and their applications to the
measurement of non-electrical quantities like temperature, pressure, flow-rate
displacement, acceleration, noise level etc. Data acquisition systems. AID and D/A
converters.
5. Control System
Mathematical modelling of physical systems. Block diagrams and signal flow graphs
and their reduction. Time domain and frequency domain analysis of linear dynamical
system. Errors for different type of inputs and stability criteria for feedback systems.
Stability analysis using Routh-Hurwitz array, Nyquist plot and Bode plot. Root locus
and Nicols chart and the estimation of gain and phase margin. Basic concepts of
compensator design. State variable matrix and its use in system modelling and
design. Sampled data system and performance of such a system with the samples in
the error channel. Stability of sampled data system. Elements of non-linear control
analysis. Control system components, electromechanical, hydraulic, pneumatic
components.
SECTION-II - ELECTRICAL ENGINEERING
1. Electrical Machines and Power Transformers
Magnetic Circuits - Analysis and Design of Power transformers. Construction and
testing. Equivalent circuits. Losses and efficiency. Regulation. Auto-transformer, 3-
phase transformer. Parallel operation.
Basic concepts in rotating machines. EMF, torque, basic machine types. Construction
and operation, leakage losses and efficiency.
Page 26 of 28D.C. Machines. Construction, Excitation methods. Circuit models. Armature reaction
and commutation. Characteristics and performance analysis. Generators and motors.
Starting and speed control. Testing, Losses and efficiency.
Synchronous Machines. Construction. Circuit model. Operating characteristics and
performance analysis. Synchronous reactance. Efficiency. Voltage regulation. Salient-
pole machine, Parallel operation. . tiunting. Short circuit transients.
Induction Machines. Construction. Principle of operation. Rotating fields.
Characteristics and performance analysis. Determination of circuit model. Circle
diagram. Starting and speed control.
Fractional KW motors. Single-phase synchronous and induction motors.
2. Power systems
Types of Power Stations, Hydro, Thermal and Nuclear Stations. Pumped storage
plants. Economics and operating factors.
Power transmission lines. Modeling and performance characteristics. Voltage control.
Load flow studies. Optimal power system operation. Load frequency control.
Symmetrical short circuit analysis. ZBus formulation. Symmetrical Components. Per
Unit representation. Fault analysis. Transient and steady-state stability of power
systems. Equal area criterion.
Power system Transients. Power system Protection Circuit breakers. Relays. HVDC
transmission.
3. Analog and Digital Electronics and Circuits
Semiconductor device physics, PN junctions and transistors, circuit models and
parameters, FET, Zener, tunnel, Schottky, photo diodes and their applications,
rectifier circuits, voltage regulators and multipliers, switching behavior of diodes and
transistors.
Small signal amplifiers, biasing circuits, frequency response and improvement,
multistage amplifiers and feed-back amplifiers, D.C.
amplifiers, Oscillators. Large signal amplifiers, coupling methods, push pull amplifiers,
operational amplifiers, wave shaping circuits. Multivibrators and flip-flops and their
applications. Digital logic gate families, universal gates-combination circuits for
arithmetic and logic operational, sequential logic circuits. Counters, registers, RAM
and ROMs.
Page 27 of 28Page 28 of 28
4. Microprocessor
Microprocessor architecture-Instruction set and simple assembly language
programming. Interfacing for memory and I/O. Applications of Micro-processors in
power system.
5. Communication Systems
Types of modulation; AM, FM and PM. Demodulators. Noise and bandwidth
considerations. Digital communication systems. Pulse code modulation and
demodulation. Elements of sound and vision broadcasting. Carrier communication.
Frequency division and time division multiplexing, Telemetry system in power
engineering.
6. Power Electronics
Power Semiconductor devices. Thyristor. Power transistor, GTOs and
MOSFETS. Characteristics and operation. AC to DC Converters; 1phase and 3-phase
DC to DC Converters; AC regulators. Thyristor controlled reactors; switched capacitor
networks.
Inverters; single-phase and 3-phase. Pulse width modulation. Sinusoidal modulation
with uniform sampling. Switched mode power supplies.

SECTION-III - GENERAL ABILITY TEST
The candidate’s comprehension and understanding of general English shall be tested
through simple exercises. Questions on knowledge of current events and of such
matter of everyday observation and experience in their scientific aspects as may be
expected of an educated person. Questions will also be included on events and
developments in Tele Communications, History of India and Geography. These will be
of a nature, which can be answered without special study by an educated person.