Exam 2: Transformer Technology and Design

If R² is the resistance of secondary winding of the transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be

The maximum efficiency of a distribution transformer is

In a transformer the tappings are generally provided on

The transformer ratings are usually expressed in terms of

The thickness of laminations used in a transformer is usually

Transformer breaths in when

Natural oil cooling is used for transformers upto a rating of

The purpose of providing iron core in a step-up transformer is

In the transformer the function of a conservator is to

The function of conservator in a transformer is

Spacers are provided between adjacent coils

What will happen if the transformers working in parallel are not connected with regard to polarity ?

Hysteresis loss in a transformer varies as CBmax = maximum flux density)

Material used for construction of transformer core is usually

Two transformers operating in parallel will share the load depending upon their

Power transformers are designed to have maximum efficiency at

The chemical used in breather is

No-load current of a transformer has

The highest voltage for transmitting electrical power in India is

The use of higher flux density in the transformer design