ALTERNATOR - Quiz

1) 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

2) What is the use of synchroscope?

Adjust the output voltage Adjust the phase sequence Adjust the supply frequency Indicate the correct instant for paralleling

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

Exciter Inverter Converter Synchroniser

4) What is the purpose of damper winding in alternator?

Reduces the copper loss Reduces windage losses Reduces the hunting effect Improves the voltage regulation

5) Which condition is to be satisfied before parallel operation of alternators?

Rating must be same Phase sequence must be same Rotor impedance must be same Stator impedance must be same