Untitled Quiz

The power transformer is a constant

• voltage device

• current device

• power device

• main flux device

Material used for construction of transformer core is usually

• copper

• wood

• aluminum

• silicon steel

The path of the magnetic flux in transformer should have

• low reactance

• high reluctance

• high resistance

• low resistance

The function of breather in a transformer is

• to cool the coils during reduced load

• to provide oxygen inside the tank

• to cool the transformer coil

• to arrest flow of moisture when outside air enters the transformer

A good voltage regulation of a transformer means

• output voltage fluctuation from no load to full load is least

• difference between primary and secondary voltage is maximum

• difference between primary and secondary voltage is least

• output voltage fluctuation with power factor is least

A no load test is performed on a transformer to

• efficiency

• magnetising current and loss

• core loss

• copper loss

While conducting short circuit test on a transformer the following side is short circuited

• primary side

• secondary side

• high voltage side

• low voltage side

The purpose of providing an iron core in a transformer is to

• reduce eddy current losses

• decrease the reluctance of the magnetic path

• reduce hysteresis loss

• provide support to windings

A transformer transforms

• power

• voltage

• frequency

• current

No load current of a transformer has

• has small magnitude and high power factor

• has high magnitude and low power factor

• has small magnitude and low power factor

• has high magnitude and high power factor