SSC-JE Prelims 2023 Electrical Engineering Online Test Series

Basic concepts:

Concepts of resistance, inductance, capacitance, and various factors affecting them Concepts of current, voltage, power, energy and their units.

Circuit law:

Kirchhoff‟s law, Simple Circuit solution using network theorems.

Magnetic Circuit::

Concepts of flux, mmf, reluctance, Different kinds of magnetic materials, Magnetic calculations for conductors of different configuration eg straight, circular, solenoidal, etc Electromagnetic induction, self and mutual induction.

AC Fundamentals:

Instantaneous, peak, RMS and average values of alternating waves, Representation of sinusoidal wave form, simple series and parallel AC Circuits consisting of RL and C, Resonance, Tank Circuit Poly Phase system – star and delta connection, 3 phase power, DC and sinusoidal response of R-Land R-C circuit.

Electrical Machines:

DC Machine:

Construction, Basic Principles of DC motors and generators, their characteristics, speed control and starting of DC Motors Method of braking motor, Losses and efficiency of DC Machines.

Concrete Technology:

Properties, Advantages and uses of concrete, cement aggregates, importance of water quality, water cement ratio, workability, mix design, storage, batching, mixing, placement, compaction, finishing and curing of concrete, quality control of concrete, hot weather and cold weather concreting, repair and maintenance of concrete structures.

1 Phase and 3 Phase Transformers :

Construction, Principles of operation, equivalent circuit, voltage regulation, OC and SC Tests, Losses and efficiency Effect of voltage, frequency and wave form on losses Parallel operation of 1 phase /3 phase transformers Auto transformers.

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.

Fractional Kilowatt Motors and Single Phase Induction Motors: Characteristics and applications.

Synchronous Machines:

Generation of 3-phase emf armature reaction, voltage regulation, parallel operation of two alternators, 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, HRC 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.

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 eg P N Junction diodes, Transistors (NPN and PNP type), BJT and JFET Simple circuits using these devices.