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Minimum voltage regulation occurs when the power factor of the load is_____________?
Related MCQs
Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is__________?
Short circuit test on transformers is conducted to determine__________?
If a transformer is switched on to a voltage more than the rated voltage__________?
Open circuit test on transformers is conducted to determine__________?
Part of the transformer which is most subject to damage from overheating is__________?
During open circuit test of a transformer:
The voltage transformation ratio of a transformer is equal to the ratio of__________?
A no-load test is performed on a transformer to determine__________?
Which type of winding is used in 3 phase shell-type transformer?
An open-circuit test on a transformer is conducted primarily to measure__________?
The transformer lamination’s are insulated from each other by__________?
When secondary of a current transformer is open-circuited its iron core will be__________?
The efficiency of a transformer, under heavy loads, is comparatively low because__________?
The maximum load that a power transformer can carry is limited by its__________?
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__________?
Minimum voltage regulation occurs when the power factor of the load is_____________?
A. unity
B. lagging
C. leading
D. zero
Correct Answer:
leading
✔
Last Updated:
June 29, 2018