What you know about Transformers

Which of the following does not change in a Transformer ??

• Current

• Voltage

• Frequency

• All of these

In a Transformer the energy is conveyed from Primary to Secondary

• Through the cooling coil

• Through Air

• By the Flux

• None of the above

A transformer core is laminated to

• Reduce hysteresis loss

• Reduce eddy current losses

• Reduce copper losses

• All of these.

The no-load current drawn by transformer is usually what percent of the full load current ??

• 0.2 to 0.5 %

• 2 to 5 %

• 12 to 15 %

• 20 to 30 %

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

• Conservator

• Breather

• Buchholz relay

• Exciter

A transformer transforms ?

• Voltage

• Current

• Power

• Frequency

A common method of cooling a power transformer is ??

• Natural Air Cooling

• Oil Cooling

• Air Blast Cooling

• All of these

Transformers breaths in when ??

• Load on It Increases

• Load on It decreases

• Load remains constant

• All of the above.

In a Transformer the tapping's are generally provided on

• High Voltage side

• Low Voltage side

• Primary Side

• Secondary Side

The Chemical used in Breather is

• Asbestos Fiber.

• Silica Sand.

• Sodium Chloride.

• Silica Gel