Electrical Transformer Quiz #3

All-day efficiency of the transformer depends primarily on …..

The marked increases in kVA capacity produced by connecting a two winding transformer as an autotransformer are due to …..

The kVA rating of an ordinary two winding transformer is increased when connected as an autotransformer because, …..

The saving in copper achieved by converting a two winding transformer into an autotransformer is determined by …..

The essential condition of the parallel operation of two single-phase transformer is that they should have the same …..

Which of the following connection is best suited for three-phase, four-wire service?

In a three-phase, star-star transformer connection, neutral is fundamental to the …..

As compared to the delta-delta bank, the capacity of the V-V bank of transformer is ….. percent.

A T-T connection has higher ratio of utilization that a V-V connection only when …..

For polyphase transformer connections which one will you select for three to two-phase conversion?

Instrument transformer is used on AC circuit for extending the range of …..

Before removing an ammeter from a current transformer, its secondary must be short-circuited in order to avoid …..