Transformer Working and Construction Quiz

What is the basic working principle of a transformer?

• Electromagnetic induction

• Nuclear fission

• Thermal expansion

• Chemical reaction

What kind of material is the core of the transformer made of?

• Ferromagnetic material

• Plastic

• Copper

• Aluminum

What is the purpose of using thin insulated steel laminations in the core of the transformer?

• To reduce energy loss due to eddy current formation

• To increase energy loss

• To increase heat dissipation

• To reduce heat dissipation

What is the purpose of the oil in the transformer tank?

• To reduce heat dissipation

• To increase heat dissipation

• To increase energy loss

• To reduce energy loss

What kind of winding is generally employed in transformers with high power ratings?

• Disc type winding

• Loop winding

• Spiral winding

• Coil winding

What is the configuration of the low voltage windings in a three-phase transformer?

• Loop configuration

• Spiral configuration

• Star configuration

• Delta configuration

What is the relationship between the primary and secondary currents in a transformer?

• They are unrelated

• They are directly proportional

• They are inversely proportional

• They are equal

How many output wires can be drawn from a three-phase step up transformer?

• Four

• Three

• Five

• Two