Which of the following is not a part of transformer installation ?
Which of the following is not a part of transformer installation ?
A. Conservator
B. Breather
C. Buchholz relay
D. Exciter
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An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
A. true
B. falseIn a transformer routine efficiency depends upon_____________?
In a transformer routine efficiency depends upon_____________?
A. supply frequency
B. load current
C. power factor of load
D. both B. and (c)Efficiency of a power transformer is of the order of________________?
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 centThe path of a magnetic flux in a transformer should have______________?
The path of a magnetic flux in a transformer should have______________?A. high resistance
B. high reluctance
C. low resistance
D. low reluctanceThe value of flux involved m the e.m.f. equation of a transformer is____________?
The value of flux involved m the e.m.f. equation of a transformer is____________?
A. average value
B. r.m.s. value
C. maximum value
D. instantaneous valueThe size of a transformer core will depend on__________?
The size of a transformer core will depend on__________?
A. frequency
B. area of the core
C. flux density of the core material
D. A. and B. both