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GETCO Exam Paper (30-11-2008)
Which of the following connection of transformer will give the highest secondary voltage?
Delta primary, star secondary
star primary, star secondary
Delta primary, delta secondary
star primary, delta secondary
Delta primary, star secondary
star primary, star secondary
Delta primary, delta secondary
star primary, delta secondary
Answer
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Related Question
GETCO Exam Paper (30-11-2008)
Summation transformers are used in _____ relays.
distance
pilot-wire
carrier
earth-fault
distance
pilot-wire
carrier
earth-fault
Answer
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GETCO Exam Paper (30-11-2008)
Two transformers are connected in parallel and share loads in the ratio of their kVA ratings when their ohmic impedances are
in inverse ratio of their ratings
purely reactive
equal
in direct ratio of their ratings
in inverse ratio of their ratings
purely reactive
equal
in direct ratio of their ratings
Answer
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GETCO Exam Paper (30-11-2008)
Which of the following regulation is considered to be the best
0.02
0.98
0.7
0.3
0.02
0.98
0.7
0.3
Answer
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GETCO Exam Paper (30-11-2008)
When a star delta transformer bank of three single phase transformers is to be used for step down transformation with line voltages of 23000 V and 2300 V, the ratio of transformation will be
17.2:1
12.1:1
5.8:1
10.0:1
17.2:1
12.1:1
5.8:1
10.0:1
Answer
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GETCO Exam Paper (30-11-2008)
In the protection scheme relay functions as _____ device
sensing
breaking
switching
none of these
sensing
breaking
switching
none of these
Answer
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