Tamil Nadu Public Service Commission Examination Syllabus for Combined Engineering Service (Electrical & Instrumentation Engineering).

TNPSC Electrical & Instrumentation Engineering – Paper 1:

1. FUNDAMENTALS OF ELECTRICAL ENGINEERING

Dc And Ac Series And Parallel Circuits – Kirchhoffs Law – Network Graph – Matrix Representation – Solution Of Steady State, equations – transients in AC networks – Network theorems, super position, reciprocity, Thevenin and Norton’s theorems, Maximum power transfer therorem, star delta transformation – frequency response of RL, RC, RIC series and parallel circuits – solutions of balanced and unbalanced 3 phase circuits.

2. ELECTRICAL MACHINES

Constructional features of DC Machines, emf equation and characteristics of different types of DC generators – DC motor – torque equation – DC motor characteristics – starters of DC motors speed control of DC motors – testing of DC motors – alternators – different types – constructional features – emf equation – regulation of alternators by different methods – phaseor diagram – expression for power developed as a funtion of torque angle – synchronous motors – principle of operation – v and inverted v curves – starting methods – stepper motors – principle of operation – polyphase induction motors – principle of operation phasor diagram and equivalent circuit – starting and speed control – single phase ixluction motor – principle of opetation and applications – transformers – principle of operation and construction of types different of single phase and three phase transformers – regulation,efficiency and all day efficiency.

3. CONTROL SYSTEMS

Open loop and closed loop systems – mathematical modelling of physical systems – electrical, mechanical, electro mechanical, hydraulic, pneumatic and thermal systems – transfer function and state space modelling of these systems – block diagram representation and signal flow graph – electrical analog – time response of simple system for implulse, step and ramp type of inputs – solution of state equations – STM – time domain specifications – frequency domain analysius – polar, inverse polar, bode – constant M and N circles and Nichols chart frequency domain specifications – Routh- Hurwitz stability criterion – Nyquist stability criterion – construction of root locus – determination of closed loop poles – transient response and stability from root locus

4. GENERATION TRANSMISSION AND DISTRIBUTION

Sources of energy – power plants – hydroelectric – nuclear – thermal – layout – storage schemes – turbines – hydroelectric and steam – interconnected systems – cost evaluation – nuclear reactors – fuel materials – coolant – comparison and detection of different types of power plants – transmission lines – performance – short and medium – corona – insulators – transmission towers – underground cables – distrubution – feeders – distributors and service main – comparison of distribution system – radial and ring distributors – calculation of voltages and distributors with concentrated and distributed loads.

5. PROTECTION AND SWITCH GEARS

Circuit breakers – Arc in oil – Arc interruption – theories – current chopping – oil circuit breakers – air blast circuit breakers – vacum circuit breakers – sulphur hexaflouride – circuit breakers – testing of circuit breakers – protective relays – functional charactoristics of protective relays – operating principles of relays – overcurrent relays – directional over current relays – the universal relay – torque equation – differntial relays – feeder protection – distance protection – generator protection – protection of transformers – carrier current protection – comparators – static relays – fuses and H.R.C.fuses for relays (the emphasis must be on solid state devices).

6. BASIC ELECTRONICS

Semi conductor diodes – zener diodes – transistors – FET’s power diodes – thyristors – photocell – photodiodes – power diodes – photo transistors,L.D.R.and applications – rectifiers and voltage regulators – amplifiers – classification of amplifiers – power amplifiers – wide b and amplifiers – oscillators – operational amplifiers – application of operational amplifiers – Indusstrial timers – voltage regulators – Instruementation amplifiers – A to D and D to A converteros – PLL – active filters.

7. DIGITAL TECHNIQUES

Number systems used in Digital electronics -weighted binary codes – non weighted codes – crror detection and correction,alpha numeric codes,BCD- development of Boolean algebra – truth fuctions – reading boolean expression – Boolean expansions and logic diagrams – Minterms – tables and maps – solving digital probleme – Map reduction techniques – sum of products from hybrid function – multiple out put minimizations – tabular minimisations – sequential logic – flip/flops – digtal counter – ripple counter – logi c gates – mutliplexers, demultiplexers and decoders , code converters – arithmetic funcrioons – shift registers – semi conductormemory elements – PLA.

8. NETWORK ANALYSIS

One port and two port networks – driving point impedance and admittance of one port network – open circuit impedance and short circuit admittance of two port network – transfer impedance and admittance – A,B,C,D parameters – impedence matching – filters – character istic of ideal filters – low pase and High pass filters – attenuation and phase shift – bandpass filter – elements of network synthesis – realiability of one port, hurwitz polynomical positive real function – necessary and sufficient conditions for positive real function – testing a positive real function proporties – synthesis of RL RC and LC driving point impedances.

9. ELECTRICAL MEASUREMENTS

Measurement of voltage and current – permanent magnet moving coil and moving ion meters – dynamometer type – thermocouple and rectifier typ;e instrument of power and energy – dynamometer type wattmeter and induction type energy meter – single phase and three phase – testing and calibration of energy meter – power factor meter – magnetic measurement – ballistic galvanometer and fluxmeter – BH curve – permeability measurement – current and voltage transformers – use of instrument transformers with wattmeters – KVA and KVAR metrts – maximum demand indicators – Megger.

10. ELECTRONIC MEASUREMENTS

BJT, FET and MOSFET voltmerters – solid state multimeter – DMM – audio and Radio frequency signal generators – AM signal generator – function generator – wave anlyzer – spectrum analyser – frequency measurement – measurement of period and time – phase angle measurement – bridge type of measurements – recording instruments – display instruments – general purpose oscilloscope – multitrace display – digital storage – sampling oscilloscope – sychroscope.

TNPSC Electrical & Instrumentation Engineering – Paper 2:

1.MEASUREMENT SCIENCE

Static characteristics of measuring instruments – accuracy, precision snesitivity,non-linerarity, hysteresis – dynamic characteristics – I order and II order instruments – Standards andcalibration – errors and error analysis.

2. TRANSDUCERS

Variable resistance transducers – potentiometer, strain gauge RTD, thermistor, hygrometer – Variable inductance transducers – LVDT – variablpe relectance accelerometer – variable capacitance tranaducers for differential pressure, sound and thickness measurement – piezoelectric transducer – smart tranaducors.

3. MECHANICAL MEASUREMENTS

Characteristics of instruments for measurement of displacement, velocity, acceleration, force, torque and vibration.

4. INDUSTRIAL INSTRUMENTS

Temperature measurement – thermocouples, cold-junction compensation for thermocouple, radiation and optical pyrometers – pressure measurements – bourdon gauge, bellows, diaphragme, differential pressure transmitter, vacum gauges, melead gauge, prani gauge – flow measurement – office meter, venturimeter, electro magnetic flow meter, ultrasonic flow meter, rotameter positive displacement meters,mass flowmeters.

5. ANALYTICAL INSTRUMENTS

Measurement of PH,viscosity and density – Gas chromatography – UV and IR spectrophotometers, single beam and dual beam spectrophotometers.

6. PROCESS CONTROL

Basic control actions – on – off, P, I , D, P + I , P + D and p + I + D control actions – electronic and pneumatic controllers – feed forward control, ratio control and cascade control – control valves – computer control of process – z transforms.

7. BIO MEDICAL INSTRUMENTS

Measurement of biological signals – ECG,EEG, EMG – blood pressure and blood flow measurements – defibrillators – pace maker.

8. TELEMETRY

Wired telemetry – Radio telemetry – analog modulation – time division multiplexing and frequency division multiplexing – PAM and FM transmitters – digital modalation – PCM transmitters – Demultiplexing – receivers – fibre optic transmitters and receivers.

9. MICRO PROCESSORS AND MICRO CONTROLLERS

8 bit microprocessors – 8085 and z80 – Architecture, programming and interface devices – 16 bit microprocessor 8088 – Micro controllers, 8031 and 8051 Microprocessor based instruments.

10. LOGIC AND DISTRIBUTED CONTROL

Direct digital control – supervisory control – SCADA – programmable logic control – I/o module, PLC programming, ladder diagram – distributed control system – configuration, operator station, displays, communication in DCS ,protocols, field bus.

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