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What is the purpose of the core in a transformer?

• To increase hysteresis and eddy currents

• To provide a low reluctance path for electromagnetic flux

• To support the primary winding only

• To reduce the dielectric strength

Which material is commonly used for insulation in transformers?

• Steel

• Aluminum

• Synthetic materials

• Copper

What is the main purpose of the tank in a transformer?

• To protect the core and windings from the external environment

• To reduce the dielectric strength

• To increase hysteresis losses

• To generate electromagnetic flux

What are bushings used for in a transformer?

• To reduce the weight

• To increase the voltage

• To cool the transformer

• To form a barrier between the terminals and the tank

What is the purpose of transformer oil?

• To provide added insulation between conducting parts

• To increase hysteresis losses

• To cool the transformer

• To reduce the dielectric strength

What is the function of a breather in an oil-immersed transformer?

• To increase the temperature

• To generate electromagnetic flux

• To keep the oil free from moisture

• To reduce the flashpoint of the oil

What is the purpose of an explosion vent in a transformer?

• Provides additional insulation

• Reduces the temperature

• Increases the pressure inside the tank

• Acts as an emergency exit for oil and air gases

What are tap changers used for in a transformer?

• To reduce the current

• To increase the primary voltage

• To adjust the secondary voltage

• To cool the transformer

What is the purpose of a Buchholz relay in an oil-immersed transformer?

• To cool the transformer

• To reduce the flashpoint of the oil

• To increase the oil level

• To sense faults occurring in the parts immersed in the oil

What is the function of an autotransformer?

• A device to increase hysteresis losses

• An automatic cooling system

• A device to reduce the dielectric strength

• An electrical transformer with only one winding