Transformer

The reasons behind using the AC Voltage and current in our power generations and workplace suing is that the …………?

• A- Easley Generated.

• Easley Transmitted and converted.

• Easley step-up and step-down.

• All of the above.

The reason behind not transferring the voltage in lower volt is that …..?

• The lower voltages implies higher currents and lower losses in the grid

• The lower voltages implies lower currents and lower losses in the grid.

• The higher voltages implies higher currents and lower losses in the grid.

• None of all above.

The reason behind using shell form transformers in voltage higher than 230Kv is that they have ………….?

• Better KVA to weight ratio.

• Better short circuit strength.

• Higher Immunity to transit damage

• All of the above.

In a Transformer, when windings surround the core, the transformer is ….?

• Shell form

• Core form.

• Shell and core form.

• Window form.

We may reduce the Eddy currents in transformers by ……?

• Doing the core in very thin laminations steel.

• Doing the core in very thin laminations Aluminium.

• Doing the core in thick laminations steel.

• Doing the core in very thin laminations copper.

When a transformer used to increase the voltage in secondary windings with respect to the primary winding is called ………..?

• Isolation transformer

• Step-up transformer.

• Equalizer transformer.

• Step down transformer.

What kind of transformer the figure below?

• Shell form

• Core form

• Both (shell and core)

• Isolation form transformer

What is the secondary side voltage of a transformer having a turn ratio of 10/2, if the primary voltage is 240 Volte?

• 1200 V.

• 0.83 V.

• 48 V.

• None of them mentioned.

Which winding in a transformer has less number of turns?

• Low voltage winding.

• High voltage winding.

• Primary winding.

• Secondary winding.

Which of the following does not change in the power transformer?

• coil windings

• Frequency

• Voltage

• Current