A. Current
B. Voltage
C. Frequency
D. All of the above
Related Mcqs:
- 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 - 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 - Which of the following does not change in an ordinary transformer ?
A. Frequency
B. Voltage
C. Current
D. Any of the above - 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 - Which of the following is not a part of transformer installation ?
A. Conservator
B. Breather
C. Buchholz relay
D. Exciter - While conducting short-circuit test on a transformer the following side is short circuited?
A. High voltage side
B. Low voltage side
C. Primary side
D. Secondary side - In the transformer following winding has got more cross-sectional area______________?
A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding - Which of the following properties is not necessarily desirable for the material for transformer core ?
A. Low hysteresis loss
B. High permeability
C. High thermal conductivity
D. Adequate mechanical strength - Which of the following loss in a transformer is zero even at full load ____________?
A. Core loss
B. Friction loss
C. Eddy current loss
D. Hysteresis loss - Which of the following is the most likely source of harmonics in a transformer ?
A. poor insulation
B. Overload
C. loose connections
D. Core saturation
