Transformers Which of the following insulating materials can withstand the highest temperature safely? Mica Cellulose Asbestos Glass fibre Mica Cellulose Asbestos Glass fibre ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following acts as a protection against high voltage surges due to lightning and switching? Horn gaps Conservator Breather Thermal overload relays Horn gaps Conservator Breather Thermal overload relays ANSWER DOWNLOAD EXAMIANS APP
Transformers Power transformers are generally designed to have maximum efficiency around half-load no-load 10% overload near full-load half-load no-load 10% overload near full-load ANSWER DOWNLOAD EXAMIANS APP
Transformers The hum in a transformer is mainly attributed to magnetostriction mechanical vibrations load changes oil in the transformer magnetostriction mechanical vibrations load changes oil in the transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The output current corresponding to the maximum efficiency for a transformer having core loss of 200 W and equivalent resistance referred to secondary of 0.5 Ω is 20 A 10 A 5 A 15 A 20 A 10 A 5 A 15 A ANSWER DOWNLOAD EXAMIANS APP
Transformers To step 110 V ac down to 20 V ac, the turns ratio must be 0.18 0.018 18 5.5 0.18 0.018 18 5.5 ANSWER DOWNLOAD EXAMIANS APP
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