Transformers The maximum efficiency of a distribution transformer is at no load at 80% full load at full load at 50% full load at no load at 80% full load at full load at 50% full load ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following insulating materials can withstand the highest temperature safely? Cellulose Glass fibre Asbestos Mica Cellulose Glass fibre Asbestos Mica ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 load. The turns ratio is 3:1. What is the secondary voltage? 2 V 18 V 20 V 180 V 2 V 18 V 20 V 180 V ANSWER DOWNLOAD EXAMIANS APP
Transformers The noise produced by a transformer is termed as hum zoom buzz ringing hum zoom buzz ringing ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural air cooling is generally restricted for transformers up to 15 MVA 1.5 MVA 50 MVA 5 MVA 15 MVA 1.5 MVA 50 MVA 5 MVA ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ Primary reactance is too much increased Permeability of core is increased Magnetising current is abnormally high None of the listed here Primary reactance is too much increased Permeability of core is increased Magnetising current is abnormally high None of the listed here ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS