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Electrical Machines
A flat compound generator is obtained from compound generator by connecting a variable resistor
in parallel with the series field
in parallel with the shunt field
in series with the shunt field
in series with the series field
in parallel with the series field
in parallel with the shunt field
in series with the shunt field
in series with the series field
Answer
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Related Question
Electrical Machines
Voltage across the open circuited field termninals of a synchorous machine under slip test is
DC of slip frequency.
AC of supply frequency.
DC.
A modulated supply frequency AC voltage with slip frequency envelop.
DC of slip frequency.
AC of supply frequency.
DC.
A modulated supply frequency AC voltage with slip frequency envelop.
Answer
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Electrical Machines
At what power factor, the voltage regulation of a transformer can be zero ?
Zero power factor.
Lagging power factor.
Leading power factor.
Unity power factor.
Zero power factor.
Lagging power factor.
Leading power factor.
Unity power factor.
Answer
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Electrical Machines
No load test of 3-phase induction motor gives which of the following?
constant loss
None of these
both A and B
variable loss
constant loss
None of these
both A and B
variable loss
Answer
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Electrical Machines
The type of DC motor generally used for shears and punches is
Cummulative compound motor.
Shunt motor.
Differential compound motor.
Series motor.
Cummulative compound motor.
Shunt motor.
Differential compound motor.
Series motor.
Answer
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Electrical Machines
For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio
33.3%
57.7%
50%
66.3%
33.3%
57.7%
50%
66.3%
Answer
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