DC GENERATOR - Quiz

1) What is the purpose of pole shoe in DC generator?

Reduce the air gap Increase the field strength Minimize the magnetic losses Spread out flux uniformly in the air gap

2) What is the function of split rings in DC generator?

Maintain constant voltage Collects the current unidirectionally Reduces the voltage drop at brushes Increases the terminal voltage than rated

3) Which material is used to make brush in generator?

Steel and graphite Carbon and graphite Cast iron and graphite Aluminium and graphite

4) Why DC generators are loosing their residual magnetism?

Heavy short circuit in load Running without load continuously Continuous running without break Change of direction of rotation very often

5) How does the magnetic circuit complete through the yoke and poles in a generator?

Field coils Armature core Laminated pole core Winding conductors in armature