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Electrical Machines

Electrical Machines
What is the highest possible speed of turbo alternators?

 4000 rpm
 1000 rpm
 1500 rpm
 3000 rpm

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Electrical Machines
Secondary winding of an auto transformer is also called

 compensating winding.
  common winding.
 damping winding.
 tertiary winding.

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Electrical Machines
When a DC cummulative compound wound motor is loaded

 Torque and speed both increase.
 Torque decrease and speed increases.
 Both torque and speed decrease.
  Torque increase and speed decrease.

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Electrical Machines
Tappings of a transformer are provided

 at the phase end of hv side
 at the neutral side end of hv side
 at the middle of hv side
 at the phase end of lv side

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Electrical Machines
Armature flux is.............with respect to main field flux or main field poles?

 stationary
 rotates same direction
 rotates opposite direction
None of these

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Electrical Machines
What is/are the advantages of parallel operation of alternators?

All of these
 Increase efficiency under light load conditions
 Increase in reliability
 continuity supply is maintained

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MORE MCQ ON Electrical Machines

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