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Electrical Machines
A 100 KVA transformer is operating at 60 Hz, 240 V supply. The same transformer is operating at 50 Hz, 200 V supply. The new rating is
50 KVA
123.3 KVA
100 KVA
83.33 KVA
50 KVA
123.3 KVA
100 KVA
83.33 KVA
Answer
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Related Question
Electrical Machines
The stator frame in an induction motor is used to
provide return path for the flux.
ventilate the armature.
protect the whole machine.
hold armature stamping in position.
provide return path for the flux.
ventilate the armature.
protect the whole machine.
hold armature stamping in position.
Answer
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Electrical Machines
Which of the following DC generators has rising V-I characteristics?
Compound.
None of them.
Series.
Shunt.
Compound.
None of them.
Series.
Shunt.
Answer
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Electrical Machines
For pure resistive load what is the armature reaction?
demagnetization
cross magnetization
magnetization
All of these
demagnetization
cross magnetization
magnetization
All of these
Answer
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Electrical Machines
In synchronous generator V curve is drawn between
field current on Y-axis and armature current on X-axis.
field current on X-axis and armature current on Y-axis.
either of these.
field current on X-axis and power factor on Y-axis.
field current on Y-axis and armature current on X-axis.
field current on X-axis and armature current on Y-axis.
either of these.
field current on X-axis and power factor on Y-axis.
Answer
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Electrical Machines
Which of the following induction motor has the highest starting torque?
Squirrel cage induction motor.
Same in both induction motors.
None of these
Slip ring induction motor.
Squirrel cage induction motor.
Same in both induction motors.
None of these
Slip ring induction motor.
Answer
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