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This document contains instructions and questions for an exam on high voltage engineering. It is divided into three sections: Section A contains 10 short answer questions worth 2 marks each. Section B has 5 longer answer questions worth 5 marks each, and students must attempt 4. Section C contains 3 questions worth 10 marks each and students must attempt 2. The questions cover topics like abnormalities in high voltage systems, ionization processes, switching surges, applications of cathode ray oscillographs, series resonant circuits, dielectric properties, electronegative gases, factors affecting dielectric breakdown, advantages of voltage meters, and creeping distance.

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Suraj Tiwari
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47 views2 pages

Google 11

This document contains instructions and questions for an exam on high voltage engineering. It is divided into three sections: Section A contains 10 short answer questions worth 2 marks each. Section B has 5 longer answer questions worth 5 marks each, and students must attempt 4. Section C contains 3 questions worth 10 marks each and students must attempt 2. The questions cover topics like abnormalities in high voltage systems, ionization processes, switching surges, applications of cathode ray oscillographs, series resonant circuits, dielectric properties, electronegative gases, factors affecting dielectric breakdown, advantages of voltage meters, and creeping distance.

Uploaded by

Suraj Tiwari
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Roll No. Total No.

of Pages : 02
Total No. of Questions : 09
B.Tech. (EE) (Sem.–6)
HIGH VOLTAGE ENGINEERING
Subject Code : BTEE-604A-18
M.Code. : 79318
Date of Examination : 19-07-22
Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.

SECTION-A

1. Write briefly :

(a) Give the various abnormalities in a high voltage system.

(b) What is ionization process?

(c) Name the sources of switching surges.

(d) Give the application of cathode ray oscillographs.

(e) What are the advantages of series resonant circuit?

(f) What is dielectric constant and loss factor?

(g) What are the electronegative gases?

(h) What are the factors which affect breakdown of solid dielectrics?

(i) What are the advantages of generating voltmeters?

(j) What is creeping distance?

1 | M-79318 (S2)-1549
SECTION-B

2. Briefly describe a method of recording the occurrence of lighting in an overhead


transmission line.

3. (a) List out the problems caused by corona discharge.

(b) Discuss the characteristics of liquid dielectrics.

4. Explain the tripping and control of impulse generators with Trigatron gap arrangements.

5. Enumerate the various controlling methods of over voltages due to switching and power
frequency and discuss briefly.

6. Explain the principle of generation of high frequency ac high voltage briefly.

SECTION-C

7. What is CVT? Explain how CVT can be used for high voltage ac measurement.

8. A steady state current of 5.5×10–8 A was noted during experiment in a certain gas at 8 kV
at a distance of 0.4 cm between plane electrodes. Keeping the field constant and reducing
the distance to 0.1 cm resulted in a current of 5.5 × 10–9 A. Calculate the Townsend’s
primary ionization coefficient.

9. Explain with neat diagram the generation of high DC voltages using Van-de-graff
generator. State the factor which limit the ultimate voltage developed.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.

2 | M-79318 (S2)-1549

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