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Electrical Machines
Which of the following transformer insulating oil generally used in India?
Paraffin based insulating oil.
Aromatics based insulating oil.
Olefin based insulating oil.
Naphtha based insulating oil.
Paraffin based insulating oil.
Aromatics based insulating oil.
Olefin based insulating oil.
Naphtha based insulating oil.
Answer
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Related Question
Electrical Machines
The slip of an induction motor during DC rheostatic braking is
2 + s.
1 - s.
s.
2 - s.
2 + s.
1 - s.
s.
2 - s.
Answer
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Electrical Machines
In a transformer, hysteresis and eddy current losses depend upon
both 2 and 3
maximum flux density
supply frequency
load current
both 2 and 3
maximum flux density
supply frequency
load current
Answer
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Electrical Machines
A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is
60 V.
40 V.
0 V.
20 V.
60 V.
40 V.
0 V.
20 V.
Answer
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Electrical Machines
A 440 V, 3-phase, 10 pole and 50 HZ synchronous motor delivering a torque of 50 N-m, delivers a power of
1000W
500W
3000W
100W
1000W
500W
3000W
100W
Answer
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Electrical Machines
The dc motor which can provide zero speed regulation at full load without any controller, is
series.
differential compound.
cumulative compound.
shunt.
series.
differential compound.
cumulative compound.
shunt.
Answer
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