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Electrical Machines

Electrical Machines
Brushes are always placed on--------------- , in order to achieve sparkles commutation?

 either GNA or MNA
None of these
 MNA
 GNA

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Electrical Machines
Tertiary winding in a transformer is mostly

  delta connected.
 star connected.
 zig - zag delta connected.
 zig - zag star connected.

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Electrical Machines
A compound motor has

  tertiary winding.
  only series field winding.
  only shunt field winding.
  both shunt and series field winding.

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Electrical Machines
The DC generator runs at a speed of 1000 rpm and flux per pole is 0.2 Wb, number of poles are 2 the winding is wave wound and having 480 conductors. The critical speed is 1200 rpm. Then the generated emf ( Eg )

 1500 Volt.
  0 Volt.
 1600 Volt.
 2000 Volt.

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Electrical Machines
Number of slip rings in 3-phase synchronous motor will be

 1
 0
 2
 3 or 4

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Electrical Machines
In which transformer, the tertiary winding is used?

 Delta - delta
 Star - delta
 Star - star
 Delta - star

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MORE MCQ ON Electrical Machines

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