1
GATE EE 1995
Numerical
+1
-0
The percentage impedance of a 100 kVA, 11 kV/400V, delta/wye, 50 Hz transformer is 4.5%. For the circulation of half the full load current during short circuit test, with low voltage terminals shorted, the applied voltage on the high voltage side will be __________.
Your input ____
2
GATE EE 1994
MCQ (Single Correct Answer)
+1
-0.3
When a transformers winding suffers a short-circuit, the adjoining turns of the same winding experience
A
an attractive force
B
a repulsive force
C
no force
D
none of the above
3
GATE EE 1994
MCQ (Single Correct Answer)
+1
-0.3
Two transformers of identical voltage but of different capacities are operating in parallel. For satisfactory load sharing
A
impedances must be equal
B
per-unit impedances must be equal
C
per-unit impedances and $${X \over R}$$ ratios must be equal
D
impedances and $${X \over R}$$ ratios must be equal
4
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
Two transformers of the same type, using the same grade of iron and conductor materials, are designed to work at the same flux and current densities; but the linear dimensions of one are two times those of the other in all respects. The ratio of $$kVA$$ of the two transformers closely equals
A
$$16$$
B
$$8$$
C
$$4$$
D
$$2$$
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