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Transformers
Sumpner's test is conducted on transformers to determine
stray losses
temperature
all-day efficiency
None of these
stray losses
temperature
all-day efficiency
None of these
Answer
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Related Question
Transformers
To step 110 V ac down to 20 V ac, the turns ratio must be
18
0.18
5.5
0.018
18
0.18
5.5
0.018
Answer
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Transformers
What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?
0.25 kVA
8 kVA
4 kVA
16 kVA
0.25 kVA
8 kVA
4 kVA
16 kVA
Answer
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Transformers
Power transformers are generally designed to have maximum efficiency around
no-load
10% overload
near full-load
half-load
no-load
10% overload
near full-load
half-load
Answer
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Transformers
The approximate efficiency of a large transformer is
65%
50%
80%
95%
65%
50%
80%
95%
Answer
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Transformers
When the secondary of a transformer is short circuited, the primary inductance _______
Remians unchanged
Is decreased
None of the listed here
Is increased
Remians unchanged
Is decreased
None of the listed here
Is increased
Answer
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