Which of the following is the main advantage of an auto-transformer over a two-winding transformer?

A)
Copper losses are negligible
B)
Saving in winding material
C)
Hysteresis losses are reduced
D)
Eddy losses are totally eliminated

Correct Answer : Option (B) :   Saving in winding material

Explanation : Auto transformer is a special type of transformer which has primary and secondary winding both located on same winding. Thus, winding material required for a transformer is very less in the case of autotransformer.

Recently Updated in Transformers Questions
Which of the following parts of a transformer is visible from outside?
A)
Core
B)
Bushings
C)
Primary winding
D)
Secondary winding

Correct Answer :   Bushings

A no-load test is performed on a transformer to determine
A)
efficiency
B)
copper loss
C)
magnetising current
D)
magnetising current and loss

Correct Answer :   magnetising current and loss

Natural oil cooling is used for transformers up to a rating of
A)
250 kVA
B)
500 kVA
C)
1000 kVA
D)
3000 kVA

Correct Answer :   3000 kVA

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