Home / MCQs /

Electrical DC Generator MCQs

Read Out “Electrical DC Generators” topic to better understand all those MCQs
DC Generator MCQs; Important mcqs on DC generator

1) The yoke of the DC generator is made of

  1. silicon steel
  2. soft iron
  3. aluminium
  4. cast steel
ANSWER
EXPLANATION

2) The armature of a DC generator is made of

  1. silicon steel
  2. soft iron
  3. aluminum
  4. cast steel
ANSWER
EXPLANATION

3) The coupling field between electrical and mechanical system of a DC generator is

  1. electric field
  2. magnetic field
  3. both electric and magnetic field
  4. none of the above
ANSWER
EXPLANATION

4) The actual working part of a DC machine is

  1. field winding
  2. commutator
  3. armature winding
  4. none of the above
ANSWER
EXPLANATION

5) The armature winding of a DC generator is placed on the rotor to ………..

  1. save iron
  2. reduce losses
  3. facilitate commutation
  4. reduce armature reaction
ANSWER
EXPLANATION

6) The yoke of a DC generator carries ………. pole flux

  1. one half of the
  2. twice of the
  3. four times of the
  4. none of the above
ANSWER
EXPLANATION

7) A four pole DC generator has ……….. magnetic circuits

  1. 2
  2. 4
  3. 8
  4. 16
ANSWER
EXPLANATION

8) The DC generator field structure uses

  1. salient pole arrangement
  2. non salient pole arrangement
  3. both 1 and 2
  4. none of the above
ANSWER
EXPLANATION

9) Small DC machines generally have ……. poles

  1. two
  2. four
  3. eight
  4. sixteen
ANSWER
EXPLANATION

10) The DC machine armature is laminated in order to reduce

  1. reluctance
  2. eddy current loss
  3. hysteresis loss
  4. frictional loss
ANSWER
EXPLANATION

11) The armature conductor current of a DC machine is

  1. AC
  2. DC
  3. pulsating DC
  4. pulsating AC
ANSWER
EXPLANATION

12) The greatest eddy current loss in a DC machine occurs in ………..

  1. yoke
  2. armature
  3. field poles
  4. commutating poles
ANSWER
EXPLANATION

13) The voltage drop at the brushes of a DC machine is …..

  1. 2 volts
  2. 3 volts
  3. 4 volts
  4. 6 volts
ANSWER
EXPLANATION

14) The carbon brushes are used in a DC machine because

  1. carbon lubricates and polishes the commutator
  2. contact resistance is decrease
  3. carbon is cheap
  4. none of the above
ANSWER
EXPLANATION

15) The DC machine armature winding is ………. winding

  1. an open circuit
  2. a closed circuit
  3. partly open circuit and partly closed circuit
  4. none of the above
ANSWER
EXPLANATION

Check Also

Electrical Basic Concept MCQs 1) The diameter of an atom is about: 10-10 m  10-02 m 10-08 m …

Leave a Reply

Your email address will not be published. Required fields are marked *