Related Questions

Which of the following is the main advantage of an auto-transformer over a two-winding transformer?
A Eddy losses are totally eliminated
B Copper losses are negligible
C Saving in winding material
D Hysteresis losses are reduced
Some wire- wound resistors have bifilar winding. This type of winding is used to
A Increase the thermal stability
B Reduce the tolerance
C Reduce the inductance of winding
D Double the power rating of the resistor
________ cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall
A Direct
B Indirect
C Conventional
D Any of the above
In the transformer following winding has got more cross-sectional area
A Low voltage winding
B High voltage winding
C Primary winding
D Secondary winding
Which winding of the transformer has less cross-sectional area?
A Primary winding
B Secondary winding
C Low voltage winding
D High voltage winding
Which winding in a transformer has more number of turns?
A Low voltage winding
B High voltage winding
C Primary winding
D Secondary winding
Primary winding of a transformer
A is always a low voltage winding
B is always a high voltage winding
C could either be a low voltage or high voltage winding
D none of the above
The short circuit in any winding of the transformer is the result of
A mechanical vibration
B insulation failure
C loose connection
D impulse voltage
The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:
A One-half the primary current
B Same as the primary current
C Twice the primary current
D No more than 10% less than the primary current
E None of the above
When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as ________ double cover butt joint.
A Single riveted
B Double riveted
C Multi riveted
D None of these

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