1000+ Transformer Questions and Answers Pdf - 2

Question: 6

When a given transformer is run at its rated voltage but reduced frequency its

(A) core flux density is increased

(B) core flux density is reduced

(C) iron losses are reduced

(D) flux density remains unaffected

Question: 7

Open circuit test on transformers is conducted to determine

(A) eddy current losses

(B) core losses

(C) copper losses

(D) hysteresis losses

Question: 8

In an ideal transformer, on no load, the primary voltage is balanced by

(A) the drop across resistances and reactance’s

(B) the secondary voltage

(C) the secondary induced e.m.f.

(D) the primary induced e.m.f.

Question: 9

The colour of fresh dielectric oil for a transformer is

(A) colourless

(B) pale yellow

(C) white to grey

(D) dark brown

Question: 10

In the transformer following winding has got more cross sectional area

(A) primary winding

(B) secondary winding

(C) low voltage winding

(D) high voltage winding