1. The effect of Armature reaction on field flux at unity power factor load on alternator is.

 

Cross magnetizing

Magnetizing

De magnetizing

Nominal

 

2. An alternator is connected to Infinite bus bar, the power factor is determined by

 

Excitation

Load

Prime mover

Speed

 

 

3. The load sharing between two parallel connected alternator can be adjusted by 

    varying the 

Prime mover output.

Speed.

Field strength.

Power factor.

 

 

 

4.   For proper parallel operation, an alternator must have same.

 

Speed.

KVA rating.

Excitation.

Voltage rating.

 

 

 

5.   Three phase alternator are generally star connected to 

 

Minimize losses.

Get higher terminal voltage.

Decrees the number of turn in the winding.

Get less terminal voltage.