Transformers Mcqs
Transformers Mcqs, this topic has 134 mcqs, It takes five to ten minutes to complete this free Transformers Mcqs test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "Transformers Mcqs" MCQs and share with your friends, brothers, sisters.
Transformers Mcqs (Total Quiz: 134)
MCQ: Which of the following acts as a protection against high voltage surges due to lightning and switching ?
- Horn gaps
- Thermal overload relays
- Breather
- Conservator
A
MCQ: A good voltage regulation of a transformer means________________?
- output voltage fluctuation from no load to full load is least
- output voltage fluctuation with power factor is least
- difference between primary and secondary voltage is least
- difference between primary and secondary voltage is maximum
A
MCQ: Which of the following protection is normally not provided on small distribution transformers ?
- Overfluxing protection
- Buchholz relay
- Overcurrent protection
- All of the above
B
MCQ: For a transformer, operating at constant load current, maximum efficiency will occur at______________?
- 0.8 leading power factor
- 0.8 lagging power factor
- zero power factor
- unity power factor
D
MCQ: A transformer can have regulation closer to zero___________?
- on full-load
- on overload
- on leading power factor
- on zero power factor
C
MCQ: In a transformer the resistance between its primary and secondary should be_____________?
- zero
- 10 Q
- 1000 Q
- infinity
D
MCQ: The secondary of a current transformer is always short-circuited under operating conditions because it____________________?
- avoids core saturation and high voltage induction
- is safe to human beings
- protects the primary circuit
- none of the above
A
MCQ: A shell-type transformer has_________?
- high eddy current losses
- reduced magnetic leakage
- negligibly hysteresis losses
- none of the above
B
MCQ: N atural air coo ling is generally restricted for transformers up to__________?
- 1.5 MVA
- 5 MVA
- 15 MVA
- 50 MVA
A