TRANSFORMER - Practice Mode

1) Which condition is absolutely essential for parallel operation of two transformers?

Nature of load Type of cooling Phase sequence Class of insulation used

Correct Answer: Phase sequence

2) Which construction technique is used to reduce copper loss in larger transformers?

Use of laminated core By reducing core thickness By using grain oriented core Use stepped core arrangement

Correct Answer: Use stepped core arrangement

3) Which transformer is used to measure high voltage installations?

Pulse transformers Ignition transformers Potential transformers Constant voltage transformers

Correct Answer: Potential transformers

4) How does the moisture is controlled in breather fitted on power transformers?

Using silica gel Using transformer oil Using sodium chloride Using ammonium jelly

Correct Answer: Using silica gel

5) Which power loss is assessed by open-circuit test on transformer?

Hysteresis loss only Eddy current loss only Copper loss Core loss

Correct Answer: Core loss

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