Computer Programming MCQs

5739 MCQs  (Page 14 of 574)

Attempt Computer Programming MCQs Quiz
No-load current in a transformer________________?
A. Lags behind the voltage by about 75°
B. Leads the voltage by about 75°
C. Lags behind the voltage by about 15°
D. Leads the voltage by about 15°
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The purpose of providing an iron core in a transformer is to_____________?
A. Provide support to windings
B. Reduce hysteresis loss
C. Decrease the reluctance of the magnetic path
D. Reduce eddy current losses
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Which of the following is not a part of transformer installation ?
A. Conservator
B. Breather
C. Buchholz relay
D. Exciter
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While conducting short-circuit test on a transformer the following side is short circuited?
A. High voltage side
B. Low voltage side
C. Primary side
D. Secondary side
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In the transformer following winding has got more cross-sectional area______________?
A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding
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A transformer transforms__________________?
A. Voltage
B. Current
C. Power
D. Frequency
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A transformer cannot raise or lower the voltage of a D.C. supply because_______________?
A. There is no need to change the d.c. voltage
B. A d.c. circuit has more losses
C. Faraday’s laws of electromagnetic induction are not valid since the rate of change of flux is zero
D. None of the above
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Primary winding of a transformer________________?
A. Is always a low voltage winding
B. Is always a high voltage winding
C. Could either be a low voltage or high voltage winding
D. None of the above
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Which winding in a transformer has more number of turns ?
A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding
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Efficiency of a power transformer is of the order of________________?
A. 100 per cent
B. 98 per cent
C. 50 per cent
D. 25 per cent
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Word of the Day
10 Jul
Spur
a thing that prompts or encourages someone; an incentive.
اکسانے والی بات، آر،مہمیز

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