Q-1: Choose the correct answer: 1. These substations are usually located at the generating stations a) Stepdown PSS b) Step-up PSS c) Isolating PSS d) Distribution PSS 2. The reason to rise the voltage for transmission is to: a) Increase losses in transmission b) Decrease losses in transformers c) Increase efficiency of transmission d) Increase efficiency of generation 3. Ionization coefficients a, y are functions of a) Ratio of electric field to pressure b) Applied voltage c) Pressure and temperature d) Electric field 4. A negative ion gives up its extra electron is: a) photo ionization b) simple collision ionization c) Electron detachment d) Electron Attachment 5. The electric field E, in a gas bubble immersed in a liquid of permittivity &, is given by: а) Еb 361 Eo 2€,+€1 361 Eo b) E, = %3D 2€1+1 2 E e) E, = 1.4 ( RE2. r³(Ej=€2) dE E. dx d) E, = E1-282 6. Formation of a permanent conducting path across a surface of solid insulation is called as: a) Tracking b) Flashover c) Oxidation d) Erosion

Q-1: Choose the correct answer: 1. These substations are usually located at the generating stations a) Stepdown PSS b) Step-up PSS c) Isolating PSS d) Distribution PSS 2. The reason to rise the voltage for transmission is to: a) Increase losses in transmission b) Decrease losses in transformers c) Increase efficiency of transmission d) Increase efficiency of generation 3. Ionization coefficients a, y are functions of a) Ratio of electric field to pressure b) Applied voltage c) Pressure and temperature d) Electric field 4. A negative ion gives up its extra electron is: a) photo ionization b) simple collision ionization c) Electron detachment d) Electron Attachment 5. The electric field E, in a gas bubble immersed in a liquid of permittivity &, is given by: а) Еb 361 Eo 2€,+€1 361 Eo b) E, = %3D 2€1+1 2 E e) E, = 1.4 ( RE2. r³(Ej=€2) dE E. dx d) E, = E1-282 6. Formation of a permanent conducting path across a surface of solid insulation is called as: a) Tracking b) Flashover c) Oxidation d) Erosion

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.56P: Three single-phase two-winding transformers, each rated 3kVA,220/110volts,60Hz, with a 0.10 per-unit...

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