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1. Peak to peak ripple is defined as a) The difference between average de voltage and peak value b) The difference between ac (ms) and average de voltages c) The difference between maximum ac and average de voltages d) The difference between maximum and minimum de voltage e) The difference between maximum and average de voltage 2. Gas insulated substation (GIS) use following gas for insulation а) СО b) Hydrogen c) Sulfur hexafluoride d) Nitrogen e) Helium 3. The Townsends Criterion for Threshold sparking is given as: a) yead = 2 b) ead c) ead /y = d) y(ead – 1)² = 1 e) y(eªd – 1) = 1 = 1 4. The requirement of gases for insulation purpose is a) High thermal stability and low temperature condensation. b) High boiling point c) High thermal stability d) High dielectric strength and thermal stability e) High dielectric strength only

1. Peak to peak ripple is defined as a) The difference between average de voltage and peak value b) The difference between ac (ms) and average de voltages c) The difference between maximum ac and average de voltages d) The difference between maximum and minimum de voltage e) The difference between maximum and average de voltage 2. Gas insulated substation (GIS) use following gas for insulation а) СО b) Hydrogen c) Sulfur hexafluoride d) Nitrogen e) Helium 3. The Townsends Criterion for Threshold sparking is given as: a) yead = 2 b) ead c) ead /y = d) y(ead – 1)² = 1 e) y(eªd – 1) = 1 = 1 4. The requirement of gases for insulation purpose is a) High thermal stability and low temperature condensation. b) High boiling point c) High thermal stability d) High dielectric strength and thermal stability e) High dielectric strength only

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Q-3: Choose the correct answer: (Answer Five Only) 1. Peak to peak ripple is defined as a) The difference between average de voltage and peak value b) The difference between ac (rms) and average de voltages c) The difference between maximum ac and average de voltages d) The difference between maximum and minimum de voltage e) The difference between maximum and average de voltage 2. Gas insulated substation (GIS) use following gas for insulation a) CO b) Hydrogen c) Sulfur hexafluoride d) Nitrogen e) Helium 3. The Townsends Criterion for Threshold sparking is given as: a) yead = 2 b) ead = 1 c) ead /y = d) y(ead - 1)? = 1 e) y(ead - 1) = 1 4. The requirement of gases for insulation purpose is a) High thermal stability and low temperature condensation. b) High boiling point c) High thermal stability d) High dielectric strength and thermal stability e) High dielectric strength only 5. The mechanism of breakdown in vacuum is due to a) Particle exchange b) Field emission c) Clump formation d) None of above e) All of the above. 6. Liquids with solid impurities a) Have higher dielectric strength b) Of large size have higher dielectric strength c) Have high Dielectric strength as compared to pure liquids d) Have lower dielectric strength as compared to pure liquids e) None of the above
Transcribed Image Text:Q-3: Choose the correct answer: (Answer Five Only) 1. Peak to peak ripple is defined as a) The difference between average de voltage and peak value b) The difference between ac (rms) and average de voltages c) The difference between maximum ac and average de voltages d) The difference between maximum and minimum de voltage e) The difference between maximum and average de voltage 2. Gas insulated substation (GIS) use following gas for insulation a) CO b) Hydrogen c) Sulfur hexafluoride d) Nitrogen e) Helium 3. The Townsends Criterion for Threshold sparking is given as: a) yead = 2 b) ead = 1 c) ead /y = d) y(ead - 1)? = 1 e) y(ead - 1) = 1 4. The requirement of gases for insulation purpose is a) High thermal stability and low temperature condensation. b) High boiling point c) High thermal stability d) High dielectric strength and thermal stability e) High dielectric strength only 5. The mechanism of breakdown in vacuum is due to a) Particle exchange b) Field emission c) Clump formation d) None of above e) All of the above. 6. Liquids with solid impurities a) Have higher dielectric strength b) Of large size have higher dielectric strength c) Have high Dielectric strength as compared to pure liquids d) Have lower dielectric strength as compared to pure liquids e) None of the above
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