Q$2)$ : Use no load test for single phase transformers to check performance

The following data were obtained on a $100$kVA,$\frac{2400}{240}V$ transformer.

Open$-$circuit test, instruments on low side:

Wattmeter reading: $412$ W

Ammeter reading: $10\mathrm{.}25$ A

Voltmeter reading: $240$ V

Short$-$circuit test, instruments on high side:

Wattmeter reading: $910$ W

Ammeter reading: $22\mathrm{.}25$ A

Voltmeter reading: $182$ V

Compute the six parameters of the equivalent circuit, referred to the high and low sides.

Q$3)$ Use no load test for single phase transformers to check performance

For the transformer in Q$2,$

Find the efficiency when rated kVA is delivered to a load having a power factor of $0\mathrm{.}85$ lagging

Compute the voltage regulation