7000+ TNMAWS Questions and Answers Pdf - 2

Question: 6

DC machines are designed to have maximum efficiency around _____

Answer:

full load

Question: 7

An induction motor always operates at _____ power factor.

Answer:

lagging

Question: 8

The phase difference between emfs induced in primary and secondary windings by mutual flux is

Answer:

zero

Question: 9

The short circuit test in a transformer is used to determine the _____ loss at full load.

Answer:

copper

Question: 10

Transformer operates on _____ only.

Answer:

ac

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