A) Magnetizing current and core loss B) Magnetizing impedance C) Equivalent resistance and reactance D) Equivalent resistance and core loss. Ans : (C)
A) Open circuit test B) Short circuit test C) Both open and short circuit test D) Other then above test. Ans : (A)
A) Equivalent resistance and leakage reactance B) Magnetizing current and core loss rated voltage C) Copper loss D) Both (B) and (C). Ans : (B)
A) Transformer with maximum efficiency at full load B) Transformer with maximum efficiency at half load C) Both will have same efficiency. Ans : (B)
A) 100 % B) 50 % C) 10 % D) 1 %. Ans : (C)
A) 55.56 % B) 72 % C) 81 % D) 90 % Ans : (A)
A) Motor protection B) Transformer protection C) Greater protection D) Lime protection. Ans : (B)
A) 1 % to 3 % B) 5 % to 10 % C) 15 % to 20 % D) 25 %. Ans : (A)
A) Hysteresis loss B) Eddy current loss C) Both (A) and (B) D) None of the above. Ans : (C)
A) Zero watts B) Less than 30 watts C) More than 30 watts D) 30 watts. Ans : (A)