Explore topic-wise MCQs in Electrical Engineering Questions.

Power transformers are designed to have maximum efficiency at___________?

In the transformer the function of a conservator is to_______________?

In a transformer routine efficiency depends upon_____________?

While conducting short-circuit test on a transformer the following side is short circuited?

In the transformer following winding has got more cross-sectional area______________?

If a transformer is switched on to a voltage more than the rated voltage______________?

Which type of winding is used in 3 phase shell-type transformer?

An open-circuit test on a transformer is conducted primarily to measure______________?

Part of the transformer which is most subject to damage from overheating is_____________?

During open circuit test of a transformer:

Sumpner’s test is conducted on transformers to determine_____________?

The permissible flux density in case of cold rolled grain oriented steel is around__________?

The transformer lamination’s are insulated from each other by____________?

The dielectric strength of transformer oil is expected to be______________?

When secondary of a current transformer is open-circuited its iron core will be__________?

The efficiency of a transformer will be maximum when_____________?

No-load current in a transformer________________?

Which of the following is not a part of transformer installation ?

The purpose of providing an iron core in a transformer is to_____________?

No-load on a transformer is carried out to determine______________?

The hum in a transformer is mainly attributed to______________?

The efficiency of a transformer, under heavy loads, is comparatively low because_______________?

Which of the following is the most likely source of harmonics in a transformer ?

Iron loss of a transformer can be measured by____________?

The maximum load that a power transformer can carry is limited by its________________?

If a transformer is continuously operated the maximum temperature rise will occur in_______________?

The function of breather in a transformer is___________?

The secondary winding of which of the following transformers is always kept closed?

The size of a transformer core will depend on__________?

Negative voltage regulation is indicative that the load is___________?

Minimum voltage regulation occurs when the power factor of the load is_____________?

The efficiencies of transformers compared with that of electric motors of the same power are____________?

For the parallel operation of single phase transformers it is necessary that they should have___________?

In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?

The transformer oil should have _______ volatility and _______ viscosity?

Short circuit test on transformers is conducted to determine____________?

Which of the following is not a routine test on transformers ?

The leakage flux in a transformer depends upon______________?

An ideal transformer will have maximum efficiency at a load such that?

When a given transformer is run at its rated voltage but reduced frequency, its____________?

A transformer can have zero voltage regulation at______________?

Which of the following properties is not necessarily desirable for the material for transformer core ?

Noise level test in a transformer is a______________?

The path of the magnetic flux in transformer should have____________?

In an actual transformer the iron loss remains practically constant from no load to full load because:____________?

Which of the following property is not necessarily desirable in the material for transformer core ?

The transformer ratings are usually expressed in terms of______________?

Harmonics in transformer result in___________?

Delta/star transformer works satisfactorily when______________?

Which of the following does not change in an ordinary transformer ?