A. no losses and magnetic leakage
B. interleaved primary and secondary windings
C. a common core for its primary and secondary windings
D. core of stainless steel and winding of pure copper metal
E. none of the above
Related Mcqs:
- No-load current of a transformer has_____________?
A. has high magnitude and low power factor
B. has high magnitude and high power factor
C. has small magnitude and high power factor
D. has small magnitude and low power factor - Which of the following is the main advantage of an auto-transformer over a two winding transformer?
A. Hysteresis losses are reduced
B. Saving in winding material
C. Copper losses are negligible
D. Eddy losses are totally eliminated - The changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night is taken care of by which part of transformer?
A. Conservator
B. Breather
C. Bushings
D. Buchholz relay - An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
A. true
B. false - An ideal transformer will have maximum efficiency at a load such that?
A. copper loss = iron loss
B. copper loss iron loss
D. none of the above - In a transformer the tappings are generally provided on_____________?
A. primary side
B. secondary side
C. low voltage side
D. high voltage side - The transformer ratings are usually expressed in terms of______________?
A. volts
B. amperes
C. kW
D. kVA - Which of the following property is not necessarily desirable in the material for transformer core ?
A. Mechanical strength
B. Low hysteresis loss
C. High thermal conductivity
D. High permeability - A shell-type transformer has_________?
A. high eddy current losses
B. reduced magnetic leakage
C. negligibly hysteresis losses
D. none of the above - In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?
A. less than 15 A
B. more than 15 A
C. 15 A
D. none of the above
