Q.1.
The insulation between windings and grounded core and the insulation between thewindings of the same phase is called
Q.2.
Which of the following is the basic consideration in the design of insulation ?
Q.3.
The high voltage winding is usually which of the following type ?
Q.4.
A current density of _____ is ilsed for large power transformers with forced circulationof oil or with water cooling coils
Q.5.
For large power transformers, self oil cooled type or air blast type which of thefollowing values of current density may be used ?
Q.6.
ForkV transformers, using cold rolled grain oriented steel, which of the followingvalues of flux density may be used?
Q.7.
The usual values of maximum flux densities for distribution transformers using hotrolled silicon steel are
Q.8.
The voltage control in electric supply networks in required on account of which of the following reasons ?
Q.9.
Are always double layer type.
Q.10.
The distance between the starts of two consecutive coils measured in terms of coilsides is called
Q.11.
The winding where dummy coils are used is sometimes called