JKSSB Junior Engineer Syllabus 2019 JKSSB JE Electrical Syllabus JE Syllabus Electrical JE Syllabus

  • Jr. Engineer (Electrical) / Draftsman (Electrical)

 Multiple Choice Based Written test
Reference Guidelines and Syllabus
120 Marks/120 Minutes
1. Electric Circuits and Fields: 15 Marks
Basic concepts: Concepts of resistance, inductance, capacitance and various factors effecting
them., Circuit laws: ohms law KCL, KVL, node and mesh analysis, resonance, ideal current and

voltage sources, Source conversions Thevenin’s, Norton’s and Superposition and Maximum
Power Transfer theorems, Simple Circuit solution using network theorems. Three phase circuits;
Ampere’s and Biot-Savart’s laws; inductance; dielectrics; capacitance.
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2. Control Systems: 10 Marks
Basic control system components; block diagrammatic description, reduction of block diagrams.
Open loop and closed loop (feedback) systems and stability analysis of these systems.
3. Electrical and Electronic Measurements: 15 Marks
Bridges and potentiometers; PMMC, moving iron, dynamometer and induction type instruments;
Extension of range, measurement of voltage, current, power, energy and power factor;
instrument transformers; digital voltmeters and multimeters; phase, time and frequency
measurement; Q-meters; oscilloscopes. Transducers: measurement of displacement, flow and
temperature, Megger. Measurements of active and reactive power, Measurement of Energy.

4. Electronic Devices and Circuits: 10 Marks
Energy bands in silicon, intrinsic and extrinsic silicon. Carrier transport in silicon: diffusion
current, drift current, mobility, and resistivity. p-n junction diode, Zener diode, tunnel diode,
BJT, JFET, MOS capacitor, MOSFET, LED, avalanche photo diode .Small Signal Equivalent
circuits of diodes, BJTs, MOSFETs. Simple diode circuits, clipping, clamping, rectifier. Biasing
and bias stability of transistor and FET amplifiers. Single-and multi-stage, tuned voltage,
operational, feedback, and power amplifiers. Frequency response of amplifiers. Simple op-amp
circuits. Filters. Sinusoidal oscillators; criterion for oscillation; single-transistor and op-amp
configurations. Function generators and wave-shaping circuits, 555 Timers IC and its
applications. Power supplies.
5. Digital Electronics and Microprocessor: 10 Marks
Number systems: Binary, decimal, octal, hexadecimal, BCD number systems and their
conversions, Binary and hexadecimal addition, subtraction multiplication,1’s and 2’s
complement methods of addition/subtraction. Boolean algebra, minimization of Boolean

functions; logic gates; digital IC families (DTL, TTL, ECL, MOS, CMOS). Combinatorial
circuits: arithmetic circuits, code converters, multiplexers, decoders, PROMs. Sequential circuits:
latches and flip-flops, counters and shift-registers. ADCs, DACs. Semiconductor memories.
Microprocessor (8085): architecture, instruction set, programming, memory and I/O interfacing.
Study of peripheral chips-8251,8155, 8257,8259.
6. Power Electronics and Drives: 10 Marks
Semiconductor power diodes, transistors, thyristors, triacs and MOSFETs – static characteristics
and principles of operation; triggering circuits; phase control rectifiers; bridge converters – fully
controlled and half controlled; Choppers and Inverters; concepts of adjustable speed dc and ac

7. Electrical Machines: 25 Marks
Single phase transformer – equivalent circuit, phasor diagram, tests, regulation and efficiency;
three phase transformers – connections, parallel operation; autotransformer, Energy conversion
principles, Electro-mechanical energy conversion ; DC machines–types, windings, generator
characteristics, armature reaction and commutation, starting and speed control of motors; three
phase induction motors– principles, types, performance characteristics, starting and speed
control; single phase induction motors; synchronous machines – performance, regulation and
parallel operation of generators, motor starting, characteristics and applications; servo and
stepper motors. Braking of DC and AC motors

8. Power Systems: 25 Marks
Basic power generation concepts; transmission line models and performance; cable performance,
insulation; corona and radio interference; distribution systems; power factor correction;
economic operation; symmetrical components; principles of over-current, differential and
distance protection; Generator, feeder, transformer and bus-bar protection, Lightning protection;
solid state relays and circuit breakers; Sub-Station Practices, Load frequency control, Tariffs,

Earthing. Utilisation of Electrical energy: Illumination, electrical heating and welding,

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