Vidyut Sahayak (Pareshan) Contractual study plan

Apply Kirchhoff's laws, mesh and nodal analysis to DC resistive networks containing independent and dependent sources, working 15 problems by hand.

Reduce multi-source networks with Thevenin, Norton, superposition and maximum power transfer theorems and verify each result by a second method.

Compute series and parallel RLC resonance frequency, bandwidth, Q-factor and power factor correction capacitance for single-phase AC circuits.

Calculate star/delta line and phase voltages, currents and three-phase power using √3·V_L·I_L·cosφ for balanced and unbalanced loads.

Derive the transformer EMF equation E = 4.44·f·N·Φ_max and relate turns ratio to voltage, current and reflected impedance.

Interpret open-circuit and short-circuit test data to build the transformer equivalent circuit and compute regulation and efficiency at full, half and 25% load.

Evaluate transformer parallel-operation conditions, tap-changer operation, autotransformer savings and three-phase connection groups (Yy, Yd, Dy, Dd).

Derive the DC generator EMF equation and compare lap and wave windings for voltage and current rating.

Sketch and explain the load characteristics of shunt, series and compound DC generators and motors, including commutation and armature reaction effects.

Solve DC shunt motor speed-control numericals (armature voltage, field flux, armature resistance) and compute starter resistance steps for a three-point starter.

Compute slip, rotor frequency, developed torque, maximum torque and efficiency from the equivalent circuit of a three-phase induction motor.

Compare direct-on-line, star-delta, autotransformer and rotor-resistance starting by starting current ratio, starting torque and permitted starting duration.

Draw phasor diagrams for a salient and non-salient alternator to show how excitation and load angle change terminal voltage, and compute voltage regulation by EMF and MMF methods.

Explain V-curves, damper windings and synchronous-motor starting, then state where a synchronous condenser is preferred for power factor correction.

Distinguish split-phase, capacitor-start, capacitor-run and shaded-pole single-phase motors by starting torque, efficiency and typical application.

Compare thermal, hydro and nuclear plant layouts and auxiliaries, then compute load factor, diversity factor, plant capacity factor and a two-part tariff bill.

Calculate sag and tension for overhead lines at equal and unequal tower heights, including ice and wind loading effects.

Compute inductance and capacitance of single-phase and three-phase line configurations and quantify the effect of conductor bundling and transposition.

Model short, medium (nominal-π and nominal-T) and long transmission lines, then compute sending-end voltage, regulation and line efficiency.

Explain corona formation, critical disruptive voltage and the methods used to reduce corona loss.

Compute voltage drop and power loss in radial and ring distributors carrying concentrated and uniformly distributed loads.

Select cable size and derate current rating for ambient temperature, grouping, depth of laying and soil thermal resistivity.

Determine CT ratio, plug setting and time multiplier setting for a three-stage overcurrent and earth-fault relay scheme, and explain directional and distance relay zones.

Analyse Merz-Price differential protection for transformer and generator, Buchholz relay operation and restricted earth-fault protection.

Describe arc-quenching principles in oil, air-blast, SF6 and vacuum circuit breakers and match each breaker type to a voltage class.

Derive average and RMS output voltage, ripple factor and input power factor for single-phase and three-phase controlled rectifiers feeding R and RL loads.

Compute duty cycle and current ripple for buck, boost and buck-boost choppers to reach a target output voltage.

Explain V/f control and PWM inverter operation in induction-motor drives, and distinguish constant-torque from constant-power load duty.

Select PMMC versus moving-iron instruments for AC and DC measurement, and compute wattmeter, energy-meter and CT/PT ratio errors.

Explain Wheatstone, Maxwell and Schering bridges and state which bridge measures resistance, inductance and capacitance respectively.

Analyse diode, BJT and MOSFET bias circuits, then compute quiescent point, mid-band gain and input/output impedance of a CE amplifier.

Convert between binary, octal, hexadecimal and BCD, and simplify Boolean expressions with K-maps before implementing them using only NAND or NOR gates.

Design combinational circuits using adders, multiplexers and decoders, and explain flip-flop, counter and shift-register operation with timing waveforms.

Derive transfer functions and evaluate rise time, peak overshoot and settling time for first- and second-order systems.

Apply Routh-Hurwitz, root-locus and Bode-plot criteria to judge stability and read gain and phase margins.

Compute connected load, cable size, MCB/fuse rating and plate or pipe earthing requirements for one domestic and one small industrial wiring layout.

Apply Indian Electricity Rules and safety practice to earthing resistance limits, RCCB/ELCB selection, permit-to-work and first aid for electric shock.

Estimate conduit, wire, switch and accessory quantities for a given wiring layout and prepare a material and cost sheet.

Compare grid-tied and off-grid solar PV, wind and biomass systems, then compute annual energy saving, payback period and bulb/fan replacement savings.

Attempt a full-length mock covering quantitative aptitude, reasoning and Gujarati/English grammar, and analyse section-wise accuracy.