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ELECTRICAL MACHINES

Electrical Machines
What is/are the necessary conditions for parallel operation of alternators?

 Speed of alternators should be same
 Both 1and 2
 Frequency should be same
 Terminal voltage is same

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Electrical Machines
Quadrature axis synchronous reactance is the ratio of

 Vmax to Imin.
 Vmax to Imax.
 Vmin to Imax.
 Vmin to Imin.

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Electrical Machines
Direct axis reactance is defined as the ratio of

 Vmax to Imin
 Vmin to Imax
 Vmax to Imax
 Vmin to Imin

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Electrical Machines
Voltage regulation can be determined by which of the following?

All of these
 ZPF method.
 Synchronous impedance method.
 MMf method.

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Electrical Machines
Which of the following voltage regulation method is accurate ?

 Synchronous impedance method
 ZPF method
 American standard association method
 MMf method

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