DC GENERATOR - Quiz

1) What is the purpose of field coils in D.C generator?

To increase the flux in air gap To decrease the magnetizing current To magnetize the poles to produce coil flux To increase the reluctance of magnetic path

2) Which metal is used to make pole core of large DC generator machines?

Soft iron Cast iron Cast steel Stainless steel

3) Why the pole core stampings are laminated in DC generator?

Reduce the friction loss Reduce the windage loss Reduce the hysteresis loss Reduce the eddy current loss

4) Which type of DC generator is used for electroplating process?

Shunt generator Series generator Differential compound generator Cumulative compound generator

5) What is the purpose of compensating winding in DC generator?

Minimizes rough commutation Maintain constant output voltage Neutralizes the demagnetizing effect Decreases the excitation current of field coils