Kerala Public Service Commission Assistant Engineer Electrical Syllabus
Detailed Syllabus for the post of Assistant Engineer Electrical in Public Works/ Irrigation Department
Exam Date – 30th June 2022
| Topic & Marks | Content |
| Electric Circuit (10 marks) | Kirchoff’s laws-maximum power transfer theorem. Star/ delta transformation. Energy stored in a capacitor and inductor. Analysis of coupled circuits – dot polarity convention – sinusoidal steady state analysis of coupled circuits. Generation of alternating voltages and currents – ms value, average value, peak factor, form factor. AC through series R,L,C circuit – series resonance – resonant power – band width. Resonance in parallel circuits |
| Magnetic Circuits -Absolute and relative permeability of a medium (10 marks) | Magnetic field strength – magnetic potential. Relation between magnetism and electricity – series and parallel magnetic circuits with composite materials. Faraday’s laws of electromagnetic induction – Lenz’s law – statically and dynamically induced emf. |
| DC Generators (10 marks) | Constructional details, working principle – types of dc generators – emf equation – power stages – condition for maximum efficiency. DC motor – armature control and field control. Single phase transformer – working principle, equivalent, circuit, losses in a transformer, condition for maximum efficiency. Three phase transformer – construction – difference between power transformer and distribution transformer Alternators – constructional details – Synchronous motor – strting methods – synchronous condenser. Three phase induction motor – working principle, constructional details – slip, torque and current equations – torque – speed curve. |
| Digital Electronics – 10 marks | Number systems and codes : Binary, Octal and hexadecimal conversions – ASCII code, Excess- 3 code, Gray code. Combinational circuits – Adders – Full adder and half adder. Multiplexers- Demultiplexers. Flipfops – registers – counters. Digital to – Analogue and Analogue to Digital conversion.
Microprocessors – Internal architecture of 8085 microprocessor – Functional block diagram instruction set – Addressing modes – Classification of instructions- Status flags. Machine cycles and T states – Fetch and execute cycles – Timing diagram. |
| Power Systems – 10 marks | Line parameters – resistance – inductance and capacitance. Insulators – string efficiency –corona. Circuit breakers – rating –SF6 circuit breaker. Relays – types. Per unit quantities- symmetrical components – symmetrical and unsymmetrical fault. Power system stability – steady state, dynamic and transient stability –power angle curve. |
| Control Systems – 10 marks | Transfer function of LTI systems – block diagram reduction – Signal flow graph – Mason’s gain formula – Type and Order of the Systems – Characteristic equation Time domain specifications of transient and steady stat responses – Impulse and Step responses of first order and second order systems. Static error coefficients of type 0,1,2 systems. Routh’s stability criterion. Frequency domain specifications. Polar plot and Bode plot – concepts of gain margin and phase margin – stability analysis. |
| Power Electronics – 10 marks | SCR – Structure, Static characteristics. Fully controlled and half controlled bridge rectifier with R, RL and RLE loads. Voltage Source Invertrs – 1-phase half –bridge & full bridge inverter with R and RL loads- Pulse width modulation. Single quadrant, Two quadrant and Four quadrant chopper. Operational Amplifiers – fundamental differential amplifier – Modes of operation. Properties of ideal and practical Op-amp-gain, CMRR and slew rate. |
| Measurements and Instrumentation – 10 marks | Measurement standards – errors – Types of errors. Classification of instruments, secondary instruments – indicating, integrating and recording. Ammeters and voltmeters – moving coil, moving iron. Measurement of power, Dynamometer type wattmeter – Construction and working, 3- phase power measurement. Measurement of energy – Single phase energy meter – construction and working. Digital Energy meters – Time of Day (TOD) meters. Oscilloscopes – principle of operation of general purpose CRO-basics of vertical and horizontal deflection system. |
| Signals & Systems | Classification of signals – Elementary signals – Basic operations on continuous time and discrete time signals. Concept of systems – Classification of systems – Properties of systems – Time invariance – Linearity – Causality – Memory – Stability. Sampling process – Impulse train sampling – sampling theorem – Aliasing effect. Zero order and First order hold circuits. |
| Transducers – 10 marks | General Classification – LVDT – angular displacement transducers – hall effect transducers.
Batteries – Primary Cells , Secondary Cells, Battery ratings, grouping of cells. Wiring- systems of wiring, rules for domestic wiring. Earthing – types of earthing, rules for earthing. Illumination – Laws of illumination. Electric lamps – different types. |
| Data Collected By | Rashmi |
| Published On | 3rd May 2022 |
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