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Transformers
Which of the following acts as a protection against high voltage surges due to lightning and switching?
Breather
Thermal overload relays
Conservator
Horn gaps
Breather
Thermal overload relays
Conservator
Horn gaps
Answer
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Related Question
Transformers
Which of the following property is not necessarily desirable in the material for transformer core?
Mechanical strength
Low hysteresis loss
High thermal conductivity
High permeability
Mechanical strength
Low hysteresis loss
High thermal conductivity
High permeability
Answer
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Transformers
The eddy current loss in a transformer is directly proportional to _______.
Thickness of core lamination
The supply frequency
Square of thickness of core lamination
The flux density in the core
Thickness of core lamination
The supply frequency
Square of thickness of core lamination
The flux density in the core
Answer
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Transformers
The flux in the core of a single phase transformer is _____
Purely alternating one
None of the listed here
Partly alternating and partly rotating
Purely rotating one
Purely alternating one
None of the listed here
Partly alternating and partly rotating
Purely rotating one
Answer
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Transformers
Which type of winding is used in 3phase shell-type transformer?
Sandwich type
Rectangular type
Circular type
Cylindrical type
Sandwich type
Rectangular type
Circular type
Cylindrical type
Answer
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Transformers
Material used for construction of transformer core is usually
Silicon steel
Aluminium
Wood
Copper
Silicon steel
Aluminium
Wood
Copper
Answer
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