SYNCHRONISING OF ALTERNATOR - Quiz

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

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

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

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

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