WBCHSE HS Vocational Power study plan

State Ohm's law, Kirchhoff's voltage and current laws, and apply them to solve series, parallel and series-parallel DC circuits numerically without reference notes.

Compute resistance, current, voltage drop and power for at least ten mixed circuits, showing each step of the working.

Identify the parts of a domestic wiring installation (service entry, main switch, distribution board, sub-circuits, points) and explain the purpose of each in two or three sentences.

Classify common Indian cables by conductor material, insulation (PVC, XLPE), core count and cross-section, and match three standard sizes to typical lighting, socket and power sub-circuits.

Calculate the current rating needed for a given load and select a cable cross-section and fuse/MCB rating that satisfies it.

Explain the construction and working principle of a DC motor and a three-phase induction motor, naming each major part and its function.

Derive and use the transformer EMF equation and turns ratio to solve at least eight numericals on secondary voltage, current and turns.

Distinguish core-type from shell-type transformers and explain why laminations and cooling are needed.

Compute slip, synchronous speed and rotor frequency for an induction motor given supply frequency, poles and rotor speed.

Compare starters (DOL, star-delta, autotransformer) in terms of starting current reduction and state where each is used.

Trace the path of electrical energy from generation through transmission and distribution to a consumer, naming each voltage level and the equipment at each stage.

Explain why transmission uses high voltage and calculate line current and losses for a given power at two different voltages.

Describe the construction of overhead lines and underground cables, listing the conductor, insulator and support components and their selection criteria.

Explain the purpose of a distribution transformer, substation and feeder, and distinguish a radial from a ring main distribution system.

Describe the steps of conduit and casing-capping wiring installation, including marking, chasing, fixing and testing.

Explain the construction, principle and use of the moving-coil, moving-iron, dynamometer and induction-type instruments, and state which quantity each measures.

Extend an ammeter and voltmeter range using shunts and multipliers, and solve at least six numericals.

Describe how to measure earth resistance (fall-of-potential), insulation resistance (megger) and continuity, and state acceptable test values.

Explain the purpose of earthing, distinguish pipe, plate and rod earthing, and state the standard earth resistance target for domestic and industrial installations.

Match MCB, MCCB, ELCB/RCCB, fuse and earth-leakage protection to fault types (overload, short circuit, earth leakage) and select the correct device for three given scenarios.

Explain the operation of a diode, SCR, TRIAC, IGBT and MOSFET, and state one power-control application for each.

Describe rectifier, chopper and inverter circuits at block level and state where each is used in industrial drives.

Explain how a VFD controls induction motor speed and why variable-speed operation saves energy on fans and pumps.

Compare DC drives and AC drives on cost, maintenance and application, and select a suitable drive for two given industrial loads.

Explain electric heating (resistance, induction, arc) and electric welding principles, and state one industrial use of each.

Demonstrate safe workshop practice: identify the correct tool for stripping, crimping, screwing and cutting, and state the safety check before each use.

Prepare a straight-through and a two-way switch circuit on a board, terminate conductors correctly and test for continuity and polarity.

Solder a simple joint and crimp a lug, then inspect both against a written quality checklist.

State first-aid and rescue procedure for electric shock, including the sequence of actions and the reason for each step.

Explain the precautions for working on live equipment and the conditions under which live work is permitted.

Identify the statutory and licensing requirements for starting a small electrical contracting business, including registration, GST and electrical contractor licence.

Prepare a simple cost estimate for a small wiring job covering material, labour, overhead and margin.

Explain the tariff structure and power factor implications for an industrial consumer, and calculate the bill for one given consumption pattern.

Describe energy conservation measures in motors, lighting and heating, and estimate the saving for one measure.

Draft a short CV and answer three common interview questions for an electrical technician role in writing.

Revise every formula sheet from weeks 1 to 7 and rewrite each from memory, correcting any that are wrong.

Complete two full-length timed mock papers under exam conditions and score them honestly.

Review every wrong answer from the mocks and write the correct reasoning for each in one or two lines.

Re-attempt the weakest three domains until the mock score in each rises above 70 percent.