Single Phase Transformer MCQ

The reactance of a transformer depends on

Which transformer winding has the less cross-sectional area?

Which part of the transformer takes charge of the change in the volume of transformer cooling oil caused by the fluctuation in air temperature between day and night?

Which of the following is an auto-transformer's primary advantage over a two-winding transformer?

Iron losses are negligible  during short-circuit test because

An ideal transformer is one which has

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

If the supply frequency to the transformer is increased the iron loss will

Negative voltage regulation is indicative that the load is

Iron loss of a transformer can be measured by

When secondary of a current trans-former is open-circuited its iron core

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

For the parallel operation of single-phase transformers it is necessary that they should have

The transformer oil would have........volatility and........viscosity.

In a transformer, the breather's function is

Which of the following transformers always keeps its secondary winding closed?

The size of a transformer core will depend on

For transformers, natural air-cooling is typically restricted to

A shell-type transformer has

A transformer can have regulation closer to zero

The low-voltage side of a transformer is typically shorted out during a short-circuit test because it has

A current transformer's secondary winding whose primary is carrying current should

Oil is invariably used in large transformers to

A dry type transformer's windings and core should never have accumulation of dust since it

Transformer for constant voltage applications is considered good if its voltage regulation is