Basics of transformers

In core type transformer ________________

• winding surrounds the core

• core surrounds the windings

In shell type transformer ________________

• winding surrounds the core

• core surrounds the windings

The size of the lamination is ___________

• 0.25 to 0.5cm

• 0.25 to 0.5mm

Which type of transformer is more economical?

• Shell type

• Core type

Which winding is wound near the core?

• HV winding

• LV winding

A common method of cooling a power transformer is ..............

• natural air cooling

• air blast cooling

• oil cooling

• any of the above

Material used for construction od transformer core is usually

• Wood

• Copper

• aluminium

• Silicon steel

What is the primary function of a transformer?

• To increase voltage

• To decrease voltage

• To isolate circuits

• All of the above

What is the purpose of using laminated cores in transformers?

• To reduce eddy current losses

• To increase magnetic flux

• To enhance thermal conductivity

• To improve mechanical strength

What is the main advantage of using a three-phase transformer?

• Higher efficiency

• Reduced size

• Lower cost

• All of the above