DC GENERATOR - Quiz

1) Why armature resistance of a D.C generator is very low?

Reduce armature current Reduce armature voltage drop Run armature with less weight Reduce the temperature of armature

2) Why the D.C generator should run in clockwise direction only?

Protect brushes from damage Protect the residual magnetism Avoid short circuit in armature Avoid over loading of generator

3) Why compensating winding is provided in large DC generators?

Connect more loads Reduce commutation effect Neutralize armature reaction effect Increase the efficiency of generator

4) What is the reason for DC generator fails to build up voltage?

Loose brush contact Armature resistance is more Field resistance is above critical resistance Prime mover is running at above rated speed

5) What is the name of generator, if its field is connected in parallel with armature?

Shunt generator Series generator Compound generator Self excited generator