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Transformers

Transformers
Power transformers are generally designed to have maximum efficiency around

near full-load
10% overload
no-load
half-load

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Transformers
The primary leakage flux links _____

None of the listed here
Both primary and secondary windings
Secondary winding only
Primary winding only

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Transformers
The primary winding of a power transformer should always be

switched
open
fused
shorted

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Transformers
Which winding of the transformer has less cross-sectional area?

Secondary winding
Low voltage winding
High voltage winding
Primary winding

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Transformers
Short circuit test on transformers is conducted to determine

eddy current losses
hysteresis losses
core losses
copper losses

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Transformers
The efficiency of a transformer will be maximum when ______

Leakage reactance of the two winding
None of the listed here
Resistance of the two winding are equal
Copper loss is equal to constant loss

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