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Transformers
Noise level test in a transformer is a
routine test
special test
type test
None of these
routine test
special test
type test
None of these
Answer
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Related Question
Transformers
The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is
8 μH
2 μH
2 mH
4 μH
8 μH
2 μH
2 mH
4 μH
Answer
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Transformers
Natural oil cooling is used for transformers upto a rating of
3000 kVA
1000 kVA
500 kVA
250 kVA
3000 kVA
1000 kVA
500 kVA
250 kVA
Answer
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Transformers
The main reason for generation of harmonics in a transformer could be
saturation of core
mechanical vibrations
poor insulation
fluctuating load
saturation of core
mechanical vibrations
poor insulation
fluctuating load
Answer
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Transformers
Which motor is preferred for use in mines where explosive gases exist?
Induction motor
Shunt motor
Air motor
Synchronous motor
Induction motor
Shunt motor
Air motor
Synchronous motor
Answer
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Transformers
A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is
0.85 V
1.7 V
1 V
0 V
0.85 V
1.7 V
1 V
0 V
Answer
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