EX-702 (C) RGPV B.Tech
High Voltage Engineering (HVE)
Previous year papers and the official syllabus are free to read, no account needed.
Previous Year Papers
3 papers, latest Dec 2025
Syllabus, notes and important questions for EX-702 (C)
Syllabus units
Topics as the official RGPV syllabus lists them.
Unit 1 Introduction 4 topics
- Introduction to $HV$ technology
- Advantages of transmitting electrical power at high voltages
- Need for generating high voltages in laboratory
- Important applications of high voltage
Unit 2 Breakdown phenomena 11 topics
- Classification of $HV$ insulating media
- Properties of important $HV$ insulating media
- Gaseous dielectrics: primary and secondary ionization processes
- Breakdown criteria for gaseous insulation based on Townsend’s theory
- Limitations of Townsend’s theory
- Streamer theory breakdown in non‑uniform fields
- Corona discharges
- Paschen’s law and its significance
- Time lags of breakdown
- Breakdown in solid dielectrics: intrinsic, avalanche, thermal, and electro‑mechanical breakdown
- Breakdown of liquid dielectrics: suspended‑particle theory, electronic breakdown, cavity (bubble) breakdown, electro‑convection breakdown
Unit 3 Generation of $HV$ AC, DC and impulse voltage and current 12 topics
- $HV$ AC transformer and cascade connection of transformer units
- Series resonant circuit principle of operation and advantages
- Tesla coil
- $HV$ DC voltage doubler circuit
- Cockcroft‑Walton type high‑voltage $DC$ set
- Standard lightning and switching impulse voltages
- Analysis of single‑stage impulse generator and output voltage expression
- Components of multistage impulse generator
- Three‑electrode gap triggering of impulse generators
- Triggering gap and oscillograph time‑sweep circuits
- Generation of switching impulse voltage
- Generation of high‑impulse current
Unit 4 Measurement of high voltages 6 topics
- Electrostatic voltmeter: principle, construction and limitations
- Generating voltmeter: principle and construction
- Series‑resistance micro‑ammeter for $HV$ $DC$ measurements
- Standard sphere‑gap measurements for $HV$ $AC$, $HV$ $DC$ and impulse voltages and influencing factors
- Potential dividers: resistance, capacitance and mixed $RC$ types
- Surge current measurement techniques
Unit 5 High voltage tests on electrical apparatus 5 topics
- Definitions of high‑voltage testing technologies
- Tests on isolators
- Tests on circuit breakers
- Tests on cables and insulators
- Tests on transformers
Exam insights
Counted from 3 past EX-702 (C) papers.
Marks asked per paper, by unit
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Unit 1 Introduction 14 marks
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Unit 2 Breakdown phenomena 23 marks
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Unit 3 Generation of HV AC DC and Impulse Voltage and current 23 marks
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Unit 4 Measurement of high voltages 30 marks
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Unit 5 High voltage tests on electrical apparatus 19 marks
Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.
Asked again and again
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Explain the principle, construction and operation of the standard sphere gap for measurement of peak high AC, DC and impulse voltages and the factors influencing the measurement.
Asked 3 times: 2025, 2023
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Explain the triggering of an impulse generator using a trigatron (three-electrode) gap, its functions, and why triggering is required and preferred.
Asked 3 times: 2025, 2023, 2020
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Describe the tests conducted on high-voltage insulators including flash-over voltage, mechanical strength and puncture voltage tests.
Asked 3 times: 2025, 2023, 2020