Transformers Power transformers are generally designed to have maximum efficiency around 10% overload no-load half-load near full-load 10% overload no-load half-load near full-load ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Is a static device Uses inductive coupling Uses electric coupling Uses capacitive coupling Is a static device Uses inductive coupling Uses electric coupling Uses capacitive coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer the energy is conveyed from primary to secondary through air through cooling coil None of these by the flux through air through cooling coil None of these by the flux ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of colling a power transformer is Air blast cooling Natural air cooling Any of the listed here Oil cooling Air blast cooling Natural air cooling Any of the listed here Oil cooling ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers up to a rating of 500 kVA 250 kVA 3000 kVA 1000 kVA 500 kVA 250 kVA 3000 kVA 1000 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer operates poorly at very low frequencies because _____ 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 Primary reactance is too much increased Permeability of core is increased Magnetising current is abnormally high ANSWER DOWNLOAD EXAMIANS APP
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