The colour of fresh dielectric oil for a transformer is? Mark as favorite Copy Link dark brown white to grey pale yellow colourless Check Answer
Which of the following parts of a transformer is visible from outside? Mark as favorite Copy Link Bushings Core Primary winding Secondary winding Check Answer
Spiral core transformer which has core made up of steel strip has the following advantage? Mark as favorite Copy Link Less weight Lighter construction Minimum losses All above Check Answer
In a transformer an insulating material may fail due to? Mark as favorite Copy Link moisture dust voids in the winding any of the above Check Answer
An auto-transformer is preferred to a conventional 2-winding transformer? Mark as favorite Copy Link where ratio of transformation is low where it is required to isolate the two windings electrically because it is much safer to use an auto-transformer where large number of secondary taps are needed Check Answer
ln a transformer, if the magnitude of magnetizing current is more? Mark as favorite Copy Link its power factor will become low on leading side Its power factor will become low on lagging side it has no effect on the power factor of the transformer none of the above Check Answer
The degree of mechanical vibrations produced by the laminations of a transformer depends on? Mark as favorite Copy Link tightness of clamping gauge of laminations size of laminations all of the above Check Answer
The chemical used in breather for transformer should have the quality of? Mark as favorite Copy Link ionizing air absorbing moisture cleansing the transformer oil cooling the transformer oil Check Answer
In the transformer the function of a conservator is to? Mark as favorite Copy Link provide fresh air for cooling the transformer supply cooling oil to transformer in time of need protect the transformer from damage when oil expends due to heating none of the above Check Answer
No-load current in a transformer? Mark as favorite Copy Link lags behind the voltage by about 75º leads the voltage by about 75º lags behind the voltage by about 15º leads the voltage by about 15º Check Answer