A. volts
B. amperes
C. kW
D. kVA
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Related Mcqs:
- 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 no-load current drawn by transformer is usually what per cent of the full-load current ?
- A. 0.2 to 0.5 per cent B. 2 to 5 per cent C. 12 to 15 per cent D. 20 to 30 per cent...
- Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds?
- A. 50°C B. 80°C C. 100°C D. 150°C...
- The magnetising current of a transformer is usually small because it has___________?
- A. small air gap B. large leakage flux C. laminated silicon steel core D. fewer rotating parts...
- A transformer cannot raise or lower the voltage of a D.C. supply because_______________?
- A. there is no need to change the D.C. voltage B. a D.C. circuit has more losses C. Faraday’s laws of electromagnetic induction are not valid since the rate of change of flux is zero D. none of the above...
- The maximum efficiency of a distribution transformer is____________?
- A. at no load B. at 50% full load C. at 80% full load D. at full load...
- An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
- A. true B. false...
- 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 no-load test is performed on a transformer to determine_______________?
- A. core loss B. copper loss C. efficiency D. magnetising current E. magnetising current and loss...
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