Related Topics

‣  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 page-9‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-8‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-7‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-6‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-5‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-4‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-3‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields page-2‣  Objective Type Question or MCQ of Electrical Circuits and Magnetic Fields 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 Protective Relays page-4‣  Multiple Choice Question (MCQ) of Protective Relays page-3‣  Multiple Choice Question (MCQ) of Protective Relays page-2‣  Multiple Choice Question (MCQ) of Protective Relays page-1‣  Multiple Choice Question (MCQ) of Fuse‣  Multiple Choice Question (MCQ) of Circuit Breaker page-3‣  Multiple Choice Question (MCQ) of Circuit Breaker page-2‣  Multiple Choice Question (MCQ) of Circuit Breaker page-1‣  Objective Type Question or MCQ of B. Economics of Operation page-6‣  Objective Type Question or MCQ of B. Economics of Operation page-5‣  Objective Type Question or MCQ of B. Economics of Operation page-4‣  Objective Type Question or MCQ of B. Economics of Operation page-3‣  Objective Type Question or MCQ of B. Economics of Operation page-2‣  Objective Type Question or MCQ of B. Economics of Operation page-1‣  Objective Type Question or MCQ of Power System Protection page-8‣  Objective Type Question or MCQ of Power System Protection page-7‣  Objective Type Question or MCQ of Power System Protection page-6‣  Objective Type Question or MCQ of Power System Protection page-5‣  Objective Type Question or MCQ of Power System Protection page-4‣  Objective Type Question or MCQ of Power System Protection page-3‣  Objective Type Question or MCQ of Power System Protection page-2‣  Objective Type Question or MCQ of Power System Protection page-1‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-11‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-10‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-9‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-8‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-7‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-6‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-5‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-4‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-3‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-2‣  Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-1

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-generatorsMCQ-Control-SystemMCQ-Measurementsmcq-of-Generation-power-systemMCQ-of-Induction-MotorMCQ-of-Transmission-Distribution

Multiple Choice Question (MCQ) of Alternator and Synchronous Motors page-2

11. As the speed of an alternator increases, the frequency

a) Increases
b) Decreases
c) Remains constant
d) May increases or decreases depending on the power factor

Ans: (a)

12. The generator which gives dc supply to the rotor of an alternator is called

a) Convertor
b) Exciter
c) Inverter
d) Rectifier

Ans: (b)

13. The number of electrical degrees passed through in oue revoltion of a four pole synchronous alternator is

a) 360°
b) 720°
c) 1440°
d) 2880°

Ans: (a)

14. The rotor of alternator has

a) No slip rings
b) Two slip rings
c) Three slip rings
d) Four slip rings

Ans: (b)

15. Alternator works on the principle of

a) Self and mutual induction
b) Self mutual induction
c) Faraday’s law of electromagnetic induction
d) Mutual induction

Ans: (c)

16. In an alternator, when the load increases due to armature reaction, the terminal voltage

a) Rises
b) Drops
c) Remains unchanged
d) May drop or rise

Ans: (d)

17. In a rotating electrical machine, the chording angle for eliminating fifth harmonic should be

a) 38°
b) 36°
c) 33°
d) 30°

Ans: (b)

18. The exciting field coil of an alternator is generally excited by

a) A separate dc generator driver by some source
b) A separate ac generator drive by some source
c) A dc generator coupled directly to the armature shaft
d) A battery

Ans: (c)

19. The material used for the manufacture of large turbo-alternator is

a) Cold rolled grain oriented steel
b) Hot rolled grain oriented steel
c) Wrought iron
d) Cast steel

Ans: (c)

20. The ratio of armature leakage reactance to synchronous reactance of large size modern alternator is about

a) 0.05
b) 0.2
c) 0.4
d) 0.6

Ans: (b)

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