Open circuit test in a transformer is used to determine

A)
Iron loss
B)
Core loss
C)
Total loss
D)
Copper loss

Correct Answer : Option (B) :   Core loss

Explanation : Open circuit test in a transformer is used to determine the core loss, i.e., eddy current loss and hysteresis loss. The core loss of a transformer is independent of load; it depends upon rated voltage.

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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