Transformer and power system EQ

Transformer core is generally made of ___________

• Single block of core material

• By stacking large number of sheets together

• Can be made with any of the above method

• Cannot be determined

Transformer core is constructed for

• Providing least effective magnetic linkage between two windings

• Providing isolation between magnetic linkages of one coil from another

• Providing most effective magnetic linkage between two windings

• Cannot be determined

Which type of flux does transformer action need

• Constant magnetic flux

• Increasing magnetic flux

• Alternating magnetic lux

• Alternating electric flux

Core type transformer is with ____________________

• a) Large size

• b) Small size

• c) High voltage

• d) Everywhere

The majority of power transformers in use throughout the world are oil filled using a mineral oil.

• a) True

• b) False

2. Dielectric mineral oil is used in ____________

• a) Small transformers

• b) Medium transformers

• c) Large transformers

• d) In all transformers

Transformers windings are generally made of __________

• a) Steel

• b) Iron

• c) Copper

• d) Steel iron alloy

Transformer ratings are given in _____________

• kW

• kVAR

• HP

• kVA

Function of transformer is to _________________

• Convert AC to DC

• Step down or up the DC voltages and currents

• Step down or up the AC voltages and currents

What is the dielectric strength of a transformer oil?

• a) 1 kV

• b) 35 kV

• c) 100 kV

• d) 330 kV