IIT Hyderabad Junior Engineer Electrical Exam Syllabus 2026
Syllabus for Preliminary and Main Written Test-
PART- 1 (10% WEIGHTAGE)
General English [Communication Skills]
PART-2 (90% WEIGHTAGE)
- Basic electrical engineering concepts- Concepts of resistance, inductance, capacitance, and various
factors affecting them. Concepts of current, voltage, power, energy and their units. Kirchhoff’s law, Network
theorems, Concepts of flux, mmf, reluctance, Different kinds of magnetic materials, Magnetic calculations
for conductors of different configurations, Electromagnetic induction, self and mutual induction. AC Circuit
Fundamentals, Series and parallel AC Circuits consisting of R.L. and C, Resonance, Concepts/circuit analysis
of Three phase and PolyPhase systems, 3 phase power. - Measurement and measuring instruments- Different methods for measurement of power (1 phase and
3 phase, both active and reactive) and energy. Measurement of frequency and phase angle. Ammeter and
voltmeter (both moving oil and moving iron type), extension of range wattmeter, Multimeters, Megger,
Energy meter AC Bridges. Use of CRO, Signal Generator, CT, PT and their uses. Earth Fault detection. - Electrical Machines-(a) D.C. Machines – Construction, Basic Principles of D.C. motors and generators,
their characteristics, speed control and starting of D.C. Motors. Method of braking motor, Losses and
efficiency of D.C. Machines. (b) 1 phase and 3 phase transformers – Construction, Principles of operation,
equivalent circuit, voltage regulation, O.C. and S.C. Tests, Losses and efficiency. Effect of voltage, frequency
and wave form on losses. Parallel operation of transformers. Auto transformers. (c) 3 phase induction
motors, rotating magnetic field, principle of operation, equivalent circuit, torque-speed characteristics,
starting and speed control of 3 phase induction motors. Methods of braking, effect of voltage and frequency
variation on torque speed characteristics. (d) Fractional Kilowatt Motors and Single-Phase Induction
Motors- Characteristics and applications. (e) Synchronous Machines- Generation of 3- phase e.m.f.,
armature reaction, voltage regulation, parallel operation, synchronizing, control of active and reactive
power. Starting and applications of synchronous motors. - Generation, Transmission and Distribution- Different types of power stations, Load factor, diversity
factor, demand factor, cost of generation, inter-connection of power stations. Power factor improvement,
various types of tariffs, types of faults, short circuit current for symmetrical faults. Switchgears – rating of
circuit breakers, Principles of arc extinction by oil and air, H.R.C. Fuses, Protection against earth leakage /
over current, etc. Buchholtz relay, Merz-Price system of protection of generators & transformers, protection
of feeders and bus bars. Lightning arresters, various transmission and distribution system, comparison of
conductor materials, efficiency of different system. Cable – Different type of cables, cable rating and
derating factor. - Renewable Energy Source and Battery Storage- Working principle and construction of Solar
photovoltaics, wind energy, inverters, induction generators and various types of batteries with chargers. - Estimation and costing- Estimation of lighting scheme, electric installation of machines and relevant IE
rules. Earthing practices and IE Rules. - Utilization of Electrical Energy- Illumination, Electric heating, Electric welding, Electroplating, Electric
drives and motors. - Basic Electronics- Working of various electronic devices e.g. P N Junction diodes, Transistors (NPN and
PNP type), BJT and JFET. Simple circuits using these devices. - Power Electronics- Power Diodes (types, characteristics, recovery effects), Thyristors(SCR, TRIAC, DIAC),
Power BJT, Power MOSFET, IGBT, Gate drive circuits and protection.
Syllabus for Skill / Trade Test- The skill / Trade test will be based on (a) basic machines, electrical wiring and
switchgear and (b) the candidate’s experience.
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