Transformers Set 5

The power factor of the two transformers will be different from the power factor of common load ✘ Incorrect polarity will result in dead short circuit ✘ The transformers will not share load in proportion to their kVA ratings ✘ none of the above ✔

load on it increases ✘ load on it decreases ✘ load remains constant ✘ none of the above ✔

wood ✘ copper ✘ aluminium ✘ silicon steel ✔

3000 kVA ✘ 1000 kVA ✘ 500 kVA ✘ 250 kVA ✔

temperature rise ✘ dielectric strength of oil ✘ voltage ratio ✘ copper loss ✔

poor insulation ✘ Overload ✘ loose connections ✘ Core saturation ✔

load current ✘ load current and voltage ✘ load current, voltage and frequency ✘ load current, voltage, frequency and power factor ✔

zoom ✘ hum ✘ ringing ✘ buzz ✔

copper loss ✘ efficiency ✘ magnetising current ✘ magnetising current and loss ✔

Bushings ✘ Core ✘ Primary winding ✘ Secondary winding ✔