Transformers Electrical Engineering Quiz | Transformers Electrical Engineering MCQs with Answers

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Questions
101 A good voltage regulation of a transformer means
A output voltage fluctuation from no load to full load is least
B output voltage fluctuation with power factor is least
C difference between primary and secondary voltage is least
D difference between primary and secondary voltage is maximum

Answer: output voltage fluctuation from no load to full load is least
102 In a transformer the resistance between its primary and secondary should be
A zero
B 10 Q
C 1000 Q
D infinity

Answer: infinity
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103 The secondary of a current transformer is always short-circuited under operating conditions because it
A avoids core saturation and high voltage induction
B is safe to human beings
C protects the primary circuit
D none of the above

Answer: avoids core saturation and high voltage induction
104 Which of the following statements regarding an idel single-phase transformer having a turn ratio of 1 : 2 and drawing a current of 10 A from 200 V A.C. supply is incorrect ?
A Its secondary current is 5 A
B Its secondary voltage is 400 V
C Its rating is 2 kVA
D Its secondary current is 20 A

Answer: Its secondary current is 20 A
105 In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are
A hysteresis and eddy current losses
B friction and windage losses
C copper losses
D none of the above

Answer: hysteresis and eddy current losses

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