A. load current
B. load current and voltage
C. load current, voltage and frequency
D. load current, voltage, frequency and power factor
Related Mcqs:
- The path of a magnetic flux in a transformer should have______________?
A. high resistance
B. high reluctance
C. low resistance
D. low reluctance - Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?
A. Bmax
B. Bmax1-6
C. Bmax1-83
D. B max - The use of higher flux density in the transformer design____________?
A. reduces weight per kVA
B. reduces iron losses
C. reduces copper losses
D. increases part load efficiency - The value of flux involved m the e.m.f. equation of a transformer is____________?
A. average value
B. r.m.s. value
C. maximum value
D. instantaneous value - The path of the magnetic flux in transformer should have____________?
A. high reluctance
B. low reactance
C. high resistance
D. low resistance - 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 - The degree of mechanical vibrations produced by the laminations of a transformer depends on____________?
A. tightness of clamping
B. gauge of laminations
C. size of laminations
D. all of the above - In a transformer routine efficiency depends upon_____________?
A. supply frequency
B. load current
C. power factor of load
D. both B. and (c) - Greater the secondary leakage flux____________?
A. less will be the secondary induced e.m.f.
B. less will be the primary induced e.m.f.
C. less will be the primary terminal voltage
D. none of the above
