A) Commutator B) Buchholz relay C) Conservator D) Breather. Ans : (A)
A) Iron becomes fully saturated B) The power factor is high C) The current in LV side is very small D) The voltage applied across the high voltage side is a fraction of its rated voltage and so is the mutual flux. Ans : (D)
A) Sum of hysteresis and eddy current loss B) Copper loss C) Eddy current loss D) Hysteresis. Ans : (A)
A) Berry B) Shell C) Core D) Any of these. Ans : (D)
A) Increase the transformation ratio B) Reduce eddy current C) Reduce transients D) Increase impedance. Ans : (B)
A) Hysteresis loss B) Eddy current loss C) Copper loss D) All of them. Ans : (A)
A) Efficiency B) All day efficiency C) Voltage regulation D) None of these. Ans : (B)
A) Reduced to 1/16 B) Reduced to 1/2 C) Reduced to 1/8 D) Reduced to 1/4. Ans : (C)
A) 275 W B) 300 W C) 400 W D) 500 W. Ans : (B)
A) 70.7 kW B) 50 kVa C) 70.7 kVA D) 141.4 kVA. Ans : (C)