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AE-JE Foundation EE : Electrical Machines Quiz - 2

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Question 1

In the Sumpner’s test, secondary of both transformer are connected in _____ and secondary side wattmeter reading gives ______ ?

Question 2

A ∆/∆ connected transformer is connected to V/V connected transformer. The ratio of VA rating of V/V connected transformer and ∆/∆ connected transformer is

Question 3

Harmonics in transformer result in ___________

Question 4

The no load input power to a transformer is practically equal to ____ loss in the transformer.

Question 5

In parallel operation of transformer which one the following is a desirable condition?

Question 6

If total turns of main transformer are N₁, then in case of Scott connection teaser transformer will have ______ turns.

Question 7

Impedance of single phase, two winding transformer referred to primary side is 0.1 + j 0.6 p.u. The rating of the transformer is 200 V/400 V, 1 kVA. The per unit impedance is calculated on transformer base, then what is the equivalent impedance of transformer referred to secondary in ohms?