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DC Machines (Electrical Engineering) - MCQs


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Q1.
which of the following DC motors, phone removal of load, will run at the maximum speed?
  • A. series
  • B. shunt
  • C. communicative compound
  • D. differential compound

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Q2.
which of the following DC motors will have least percentage increase of input current, for the same percentage increase in torque
  • A. cumulative compound
  • B. differential compound
  • C. shunt
  • D. series

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Q3.
the DC motor that draws almost same power at different loads is
  • A. communicative compound
  • B. differential compound
  • C. series
  • D. shunt

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Q4.
the DC motor most suitable for applications requiring high starting torque is
  • A. shunt
  • B. series
  • C. cumulative compound
  • D. differential compound

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Q5.
accumulative compound DC motor runs at 1500 RPM on full load if its series field is short circuited its speed
  • A. become zero
  • B. remains same
  • C. increases
  • D. decreases

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Q6.
when ADC communicative compound wound motor is loaded
  • A. torque increases and speed decreases
  • B. torque decreases and speed increases
  • C. both speed and torque increases
  • D. both speed and torque decreases

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