Q.

The most suitable dc motor for continuously running rolling mills with intermittent loading is 

  • ADc series motor 
  • BDc shunt motor
  • CDc differentially compounded motor
  • DDc cumulatively compounded motor
Correct Answer : (D)

Dc cumulatively compounded motor

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A dc shunt motor is driving a constant torque load with normal excitation. If the filed current is halved then the motor will run at 

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A dc shunt motor is driving a mechanical load at rated voltage with normal excitation. If the load torque is increased to double of the normal one, the speed of the motor will

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