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RVUNL JE study materials
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RVUNL JE: Engineering Discipline - Branch Technical Knowledge

RVUNL JE · Work through your exam, one topic at a time.

All guide sections

Engineering Discipline - Branch Technical Knowledge

RVUNL JE technical papers test branch-specific engineering fundamentals as applied in generation, transmission, and plant O&M. Electrical candidates face machines, power systems, measurement, and protection; mechanical candidates face thermodynamics, power plant, fluids, and strength of materials; civil candidates face RCC, steel, surveying, and hydrology; instrumentation and electronics candidates face transducers, control, op-amps, and digital circuits; IT candidates face DBMS, OS, networks, and data structures. Because RVUNL is a generating utility, questions often use boiler, turbine, generator, transformer, and switchyard contexts rather than abstract circuits alone.

Branch focus

  • Electrical: transformer equivalent circuit, induction and synchronous machines, per-unit quantities, transmission-line parameters, switchgear, protective relays.
  • Mechanical: first and second laws, Rankine cycle, boiler efficiency, steam turbines, pumps, stress-strain, bending.
  • Civil: concrete mix design, limit-state design, levelling, open-channel flow, soil consolidation.
  • Instrumentation/Electronics: sensor selection, bridge circuits, PID control, op-amp configurations, logic families.
  • IT: normalization, SQL joins, CPU scheduling, TCP/IP layers, arrays and linked lists.

Worked example

A 4-pole, 50 Hz induction motor runs at 1440 r/min. Synchronous speed is Ns = 120f/P = 120 × 50/4 = 1500 r/min. Slip s = (1500 − 1440)/1500 = 0.04, i.e. 4%. The reasoning uses the definition of slip against synchronous speed, not against the rotor speed itself.

Traps that cost marks

Mixing line and phase values in three-phase circuits; using rated kVA instead of actual load when finding efficiency; ignoring sign conventions in thermodynamics; applying an IS code clause without checking the current amendment; assuming a transducer is linear over its full range.

Key points

  • Identify the plant equipment behind each numerical before choosing a formula.
  • Keep units consistent: kW versus kWh, bar versus Pa, rpm versus rad/s.
  • Draw the circuit or free-body diagram before substituting values.
  • Check whether the question asks for input, output, rated, or actual quantity.