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  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-20  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-19  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-18  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-17  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-16  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-15  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-14  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-13  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-12  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-11  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-10  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields 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page-19  Multiple Choice Question (MCQ) of Measurements page-18  Multiple Choice Question (MCQ) of Measurements page-17  Multiple Choice Question (MCQ) of Measurements page-16  Multiple Choice Question (MCQ) of Measurements page-15  Multiple Choice Question (MCQ) of Measurements page-14  Multiple Choice Question (MCQ) of Measurements page-13  Multiple Choice Question (MCQ) of Measurements page-12  Multiple Choice Question (MCQ) of Measurements page-11  Multiple Choice Question (MCQ) of Measurements page-10  Multiple Choice Question (MCQ) of Measurements page-9  Multiple Choice Question (MCQ) of Measurements page-8  Multiple Choice Question (MCQ) of Measurements page-7  Multiple Choice Question (MCQ) of Measurements page-6  Multiple Choice Question (MCQ) of Measurements page-5  Multiple Choice Question (MCQ) of Measurements page-4  Multiple Choice Question (MCQ) of Measurements page-3  Multiple Choice Question (MCQ) of Measurements page-2  Multiple Choice Question (MCQ) of Measurements page-1  Objective questions and answers or MCQ of Electrical Machines page-22  Objective questions and answers or MCQ of Electrical Machines page-21  Objective questions and answers or MCQ of Electrical Machines page-20  Objective questions and answers or MCQ of Electrical Machines page-19  Objective questions and answers or MCQ of Electrical Machines page-18  Objective questions and answers or MCQ of Electrical Machines page-17  Objective questions and answers or MCQ of Electrical Machines page-16  Objective questions and answers or MCQ of Electrical Machines page-15  Objective questions and answers or MCQ of Electrical Machines page-14  Objective questions and answers or MCQ of Electrical Machines page-13  Objective questions and answers or MCQ of Electrical Machines page-12  Objective questions and answers or MCQ of Electrical Machines page-11  Objective questions and answers or MCQ of Electrical Machines page-10  Objective questions and answers or MCQ of Electrical Machines page-9  Objective questions and answers or MCQ of Electrical Machines page-8  Objective questions and answers or MCQ of Electrical Machines page-7  Objective questions and answers or MCQ of Electrical Machines page-6  Multiple Choice Question (MCQ) of Control Systems page-10  Multiple Choice Question (MCQ) of Control Systems page-9  Multiple Choice Question (MCQ) of Control Systems page-8  Multiple Choice Question (MCQ) of Control Systems page-7  Multiple Choice Question (MCQ) of Control Systems page-6  Multiple Choice Question (MCQ) of Control Systems page-5  Multiple Choice Question (MCQ) of Control Systems page-4  Multiple Choice Question (MCQ) of Control Systems page-3  Multiple Choice Question (MCQ) of Control Systems page-2  Multiple Choice Question (MCQ) of Control Systems page-1  Multiple Choice Question (MCQ) of Protective Relays page-4  Multiple Choice Question (MCQ) of Protective Relays page-3  Multiple Choice Question (MCQ) of Protective Relays page-2  Multiple Choice 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Machines page-10  Multiple Choice Question (MCQ) of D.C. Machines page-9  Multiple Choice Question (MCQ) of D.C. Machines page-8  Multiple Choice Question (MCQ) of D.C. Machines page-7  Multiple Choice Question (MCQ) of D.C. Machines page-6  Multiple Choice Question (MCQ) of D.C. Machines page-5  Multiple Choice Question (MCQ) of D.C. Machines page-4  Multiple Choice Question (MCQ) of D.C. Machines page-3  Multiple Choice Question (MCQ) of D.C. Machines page-2  Multiple Choice Question (MCQ) of D.C. Machines page-1  MCQ of D.C generators page-11  MCQ of D.C generators page-10  MCQ of D.C generators page-9  MCQ of D.C generators page-8  MCQ of D.C generators page-7  MCQ of D.C generators page-6  MCQ of D.C generators page-5

Index

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generators

Multiple Choice Question (MCQ) of C. Power System Protection page-2

11. Stability of arc in vacuum depends upon

a) The contact material only.
b) The contact material and its vapour pressure.
c) The circuit parameters only.
d) The combination of (b) and (c).

Ans: (d)

12. Chances of arc interruption in subsequent current zeros

a) Increases in case of ABCD but decreases in OCB.
b) Decreases in case of ABCD but decreases in OCB.
c) Decreases in both the cases.
d) Increases in both the cases.

Ans: (b)

13. A 3-phase braker is rated at 2000 MVA, 33kV, its making current will be

a) 35 kA
b) 49 kA
c) 70 kA
d) 89 kA

Ans: (d)

14.Per cent bias for a generator protection lies between

a) 5 to 40
b) 40 to 45
c) 45 to 20
d) None of the above

Ans: (a)

15. An overhead line with series compensation is protected using

a) Impedance relay
b) Reactance relay
c) Mho relay
d) None of the above

Ans: (d)

16. Minimum oil circuit breaker has volume of oil because

a) There is insulation between contacts.
b) The oil between the breaker contacts has greater strength.
c) Solid insulation is provided for insulating the contacts from earth.
d) None of the above

Ans: (c)

17. Shunt fault is characterized by

a) Increase in current, frequency and p.f.
b) Increases in current reduction in frequency and p.f.
c) Increase in current and frequency but reduction in p.f.
d) None of the above.

Ans: (b)

18. Carrier current protection scheme is normally used for

a) HV transmission lines only.
b) HV cables only.
c) HV transmission and cables.
d) None of the above.

Ans: (a)

19. Where voltages are high and current to be interrupted is low the breaker preferred is

a) Air blast C.B.
b) Oil C.B.
c) Vacuum C.B.
d) Any one of the above.

Ans: (c)

20. To limit current chopping in vacuum circuit breakers, the contact material used has

a) High vapour pressure and low conductivity properties.
b) High vapour pressure and high conductivity properties.
c) Low vapour pressure and high conductivity properties.
d) Low vapour pressure and low conductivity properties.

Ans: (a)

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