What is Transformer?
What is the function of a transformer?
What is the working principle of a Transformer?
Transformer ratings are given in _____________
What is the current transformer?
Current transformers are __________________
Which of the following is not a part of transformer installation?
Transformer core is generally made of ___________
The purpose of the transformer core is to provide ____________
Transformers are generally designed for ___________
What is the thickness of laminations used in a transformer?
Which type of flux does transformer action need?
Primary winding of a transformer ______________
Which of the following transformer, Buchholz's relay can be fixed on?
What is the function of a breather in a transformer?
An ideal transformer will have maximum efficiency at a load such that _____________
Which transformer insulation material is best compare to Kraft paper?
For a transformer with primary turns 400, secondary turns 100, if 20A current is flowing through primary, we will get ___________
A 25 KVA transformer is constructed to a turns ratio of N1/N2 = 10. The impedance of primary winding is 3+j5 ohms and of secondary winding is 0.5+j0.8 ohms. What will be the impedance of transformer when referred to primary?
The full-load copper loss of a transformer is 1600 W. At half-load, the copper loss will be _______
Power transformers other than distribution transformers are generally designed to have maximum efficiency around ______
For a power transformer operating at full load it draws voltage and current equal to 200 V and 100 A respectively at 0.8 pf. Iron and copper losses are equal to 120 kW and 300kW. What is efficiency?
Voltage regulation of transformer is given by _____________
No-load current in the transformer is _______
Which of the following is the main advantage of an auto-transformer over a two-winding transformer?
For a 20kVA transformer with a turn ratio of 0.4 what amount of total power is transferred inductively?
Which of the following is the major requirement for the transformers used for electronic purposes?
Which type of winding is used in 3-phase shell-type transformer?
Why shell type 3-phase transformer is used in large power transforming applications?
Which of the following is not a routine test for transformers?