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Electrician
Electrician Set-2
Alternator
4

Alternator MCQ with Answers

4) Calculate the speed of an alternator having 2 poles at a frequency of 50 Hz?

1500 rpm

2500 rpm

3000 rpm

6000 rpm

Answer is:

3000 rpm

Alternator MCQ with Answers

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Related Alternator MCQ with Answers

5) What condition the lamps become dark in dark lamp method of parallel operation of two alternators?

Terminal voltages are e

Voltage and frequency are equal

Voltage and frequency are equal

Frequency are same in both alternator

Answer is:

Voltage and frequency are equal

6) How to compensate de-magnetizing effect due to armature reaction in an alternator?

Reducing the speed of alternator

Reducing field excitation current

Increasing field excitation current

Increasing the speed of alternator

Answer is:

Increasing field excitation current

7) What is the use of synchroscope?

Adjust the output voltage

Adjust the phase sequence

Adjust the supply frequency

Indicate the correct instant for paralleling

Answer is:

Indicate the correct instant for paralleling

8) What is the name of the equipment that provides D.C to the rotor of alternator?

Exciter

Inverter

Converter

Synchroniser

Answer is:

Exciter

Alternator MCQ with Answers

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