TRANSFORMER - Practice Mode

1) Which type of transformer is used for high frequency application?

Ring core transformer Ferrite core transformer Silicon steel core transformer Grain oriented core transformer

Correct Answer: Ferrite core transformer

Explanation:

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2) What is the function of conservator in transformer?

Prevents the moisture entry Transfers the heat to atmosphere Allows to release internal pressure Allows expansion of oil level due to load variation

Correct Answer: Allows expansion of oil level due to load variation

Explanation:

Function of conservator in transformer is to allows expansion of oil level due to load variation.

3) Which loss of transformer is determined by short circuit test?

Copper loss Windage loss Hysteresis loss Eddy current loss

Correct Answer: Copper loss

4) Calculate the voltage regulation in percentage of the transformer if the no load voltage is 240 volt and full load voltage is 220 volt?

0.072 0.083 0.0871 0.0909

Correct Answer: 0.0909

5) What is the purpose of using laminated core in transformer?

Reduce copper loss Reduce hysteresis loss Reduce mechanical loss Reduce eddy current loss

Correct Answer: Reduce eddy current loss

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