SYNCHRONISING OF ALTERNATOR - Practice Mode

1) What is the necessity of syncronising of alternators?

To increase the voltage To increase the voltage To meet the increased power demand Top minimise the current

Correct Answer: To meet the increased power demand

2) Which is the condition for paralleling of two alternators?

Frequency must be same Frequency must be same Rating must be same Phase sequence must be different

Correct Answer: Frequency must be same

3) What is the condition of incoming alternators voltages for synchronising of alternators?

Out put voltage of alternators must be different Out put voltage of alternators must be different Voltage of incoming alternator must be more Incoming voltage of alternator must be less

Correct Answer: Out put voltage of alternators must be different

4) When the three lamps used in dark lamp method will light and go out simultaneously?

Frequencies of machines are different Frequencies of machines are different Speed of alternators are same Out put voltage of alternators are same

Correct Answer: Frequencies of machines are different

5) What is the use of dark and bright lamp method?

To start the alternator To stop the alternator For synchronising of alternators To change the excitation

Correct Answer: For synchronising of alternators

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