A. temperature rise
B. dielectric strength of oil
C. voltage ratio
D. copper loss
Correct Answer: voltage ratio ✔
Last Updated: June 29, 2018
Related MCQs
- The hum in a transformer is mainly attributed to__________?
- Which of the following is the most likely source of harmonics in a transformer ?
- If a transformer is continuously operated the maximum temperature rise will occur in__________?
- Iron loss of a transformer can be measured by__________?
- Which of the following loss in a transformer is zero even at full load __________?
- Negative voltage regulation is indicative that the load is__________?
- Helical coils can be used on__________?
- If the supply frequency to the transformer is increased,”the iron loss will__________?
- Which of the following is not a routine test on transformers ?
- A transformer can have zero voltage regulation at__________?
- An ideal transformer will have maximum efficiency at a load such that?
- Noise level test in a transformer is a__________?
- In an actual transformer the iron loss remains practically constant from no load to full load because:__________?
- The path of the magnetic flux in transformer should have__________?
- When a given transformer is run at its rated voltage but reduced frequency, its__________?
- Which of the following properties is not necessarily desirable for the material for transformer core ?
- The leakage flux in a transformer depends upon__________?
- An ideal transformer is one which has__________?
- Which of the following does not change in an ordinary transformer ?
- 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?
- The magnetising current of a transformer is usually small because it has__________?
- Buchholz’s relay gives warning and protection against__________?
- Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in__________?
- During short circuit test iron losses are negligible because of __________?
- Which of the following is the main advantage of an auto-transformer over a two winding transformer?
- Power transformers are generally designed to have maximum efficiency around__________?
- Which winding of the transformer has less cross-sectional area?
- Silicon steel used in lamination’s mainly reduces__________?
- Delta/star transformer works satisfactorily when__________?
- Star/star transformers work satisfactorily when__________?
- Which of the following property is not necessarily desirable in the material for transformer core ?
- Distribution transformers are generally designed for maximum efficiency around__________?
- The value of flux involved m the e.m.f. equation of a transformer is__________?
- The main reason for generation of harmonics in a transformer could be__________?
- Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds?
- The full-load copper loss of a trans¬former is 1600 W. At half-load, the copper loss will be__________?
- A Buchholz relay can be installed on__________?
- A transformer oil must be free from__________?
- The core used in high frequency transformer is usually__________?
- In a transformer the resistance between its primary and secondary is__________?
- Harmonics in transformer result in__________?
- Helical coils can be used on__________?
- The function of conservator in a transformer is__________?
- The thickness of laminations used in a transformer is usually__________?
- Material used for construction of transformer core is usually__________?
- Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?
- The noise resulting from vibrations of laminations set by magnetic forces, is termed as__________?
- The transformer ratings are usually expressed in terms of__________?
- An ideal transformer has infinite values of primary and secondary inductances. The statement is__________?
- The chemical used in breather is__________?
- The chemical used in breather for transformer should have the quality of__________?