Auto transformer rating is chosen so as to have best performance when the analogous two winding transformer has ___________(a) two voltage levels fairly close to each other(b) very high transformation ratio(c) any voltage levels(d) step down purposeThe question was asked at a job interview.I would like to ask this question from Machine Ratings topic in division Rating and Loss Dissipation of Electrical Machines

Auto transformer rating is chosen so as to have best performance when

1.	Auto transformer rating is chosen so as to have best performance when the analogous two winding transformer has ___________(a) two voltage levels fairly close to each other(b) very high transformation ratio(c) any voltage levels(d) step down purposeThe question was asked at a job interview.I would like to ask this question from Machine Ratings topic in division Rating and Loss Dissipation of Electrical Machines
Answer» The correct answer is (a) two VOLTAGE LEVELS fairly close to each other The EXPLANATION: The auto transformer is BEST suited with the voltage levels of same rating for a two WINDING transformer.

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