DC MOTOR - Quiz

1) What is the purpose of resistor connected with holding coil in 4 point starter?

Limit current in NVC Protect the coil from short circuit Protect the motor from overload Protect the armature from short circuit

2) Why the D.C series motor field winding is wound with thick wire?

To regulate field voltage To carry the load current To keep maximum inductance To reduce the armature reaction

3) Which type of D.C motor is suitable for shearing machines?

Shunt motor Series motor Cumulative compound motor Differential compound motor

4) Where D.C compound motors are preferred?

Constant load requirements Constant speed requirements High starting torque requirements Constant speed under varying load requirements

5) What is the necessity of starter for D.C motor?

Limit the field cur Limit the field voltage Control the motor speed Limit the armature current