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Electrical Machines

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

 3000 rpm
 4000 rpm
 1000 rpm
 1500 rpm

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Electrical Machines
In dc machines, the space distribution of air-gap flux density wave at no load is

 rectangular
 sinusoidal
 flat-topped
 co- sinusoidal

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Electrical Machines
A 4 pole dc generator is running at 1500 rpm the frequency of current in the armature winding is

 100Hz.
 150Hz.
 50Hz.
 200Hz.

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Electrical Machines
A 20KVA auto transformer, turn ratio is 0.8. Find the power transferred conductively?

 0KVA
 16KVA
 4KVA
 20KVA

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

 0
 1
 3 or 4
 2

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Electrical Machines
The ventilating ducts in most of DC machine are

 radial as well as longitudinal.
 none of these.
 radial.
 longitudinal.

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MORE MCQ ON Electrical Machines

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