A) electromotive force B) magnetomotive force C) magnetic flux D) leakage flux. Ans : (D)
A) Horn gap B) Conservator C) Breather D) Buchholz relay. Ans : (A)
A) Delta primary, delta secondary B) Delta primary, star secondary C) Star primary, star secondary D) Star primary, delta secondary. Ans : (B)
A) corrosion of core material B) short circuiting of primary winding C) short circuiting of secondary winding D) reduction in heat dissipation. Ans : (D)
A) large leakage flux B) fewer rotating parts C) small airgap D) laminated silicon steel core. Ans : (C)
A) current and voltage both vary with load B) voltage remaining constant, current varies with load C) current remaining constant, voltage varies with load D) current and voltage remain constant, power factor varies with load. Ans : (B)
A) Negligible resistance B) No leakage flux C) Non-saturation of core D) All of the above. Ans : (D)
A) less than 90% B) 90% C) more than 90% D) none of above. Ans : (B)
A) In direct ratio of turns B) In direct square ratio turns C) In inverse ratio of turns D) In inverse square ratio of turns. Ans : (B)
A) Transformers transformation ratios same B) Transformers voltage ratings same C) Transformers kVA rating equal D) None of the above. Ans : (C)
A) Get heated unequally B) Share the load unequally C) Run with different power factors D) None of the above. Ans : (B)
A) voltage ratio B) kVA rating C) polarity D) percentage impedance. Ans : (A)