A. Horn gaps
B. Thermal overload relays
C. Breather
D. Conservator
Related Mcqs:
- For given applied voltage, with the increase in frequency of the applied voltage?
A. eddy current loss will decrease
B. eddy current loss will increase
C. eddy current loss will remain unchanged
D. none of the above - Which of the following protection is normally not provided on small distribution transformers ?
A. Overfluxing protection
B. Buchholz relay
C. Overcurrent protection
D. All of the above - Buchholz’s relay gives warning and protection against_________________?
A. electrical fault inside the transformer itself
B. electrical fault outside the transformer in outgoing feeder
C. for both outside and inside faults
D. none of the above - In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?
A. friction and windage losses
B. copper losses
C. hysteresis and eddy current losses
D. none of the above - When a given transformer is run at its rated voltage but reduced frequency, its____________?
A. flux density remains unaffected
B. iron losses are reduced
C. core flux density is reduced
D. core flux density is increased - A transformer can have zero voltage regulation at______________?
A. leading power factor
B. lagging power factor
C. unity power factor
D. zero power factor - The voltage transformation ratio of a transformer is equal to the ratio of_______________?
A. primary turns to secondary turns
B. secondary current to primary current
C. secondary induced e.m.f. to primary induced e.m.f
D. secondary terminal voltage to primary applied voltage - If a transformer is switched on to a voltage more than the rated voltage______________?
A. its power factor will deteriorate
B. its power factor will increase
C. its power factor will remain unaffected
D. its power factor will be zero - A good voltage regulation of a transformer means________________?
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 - 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
