Related Questions

What is the function of breather in a transformer?
A To provide oxygen inside the tank
B To cool the coils during reduced load
C To cool the transformer oil
D To arrest flow of moisture when outside air enters the transformer
The chemical used in breather for transformer should have the quality of
A ionizing air
B absorbing moisture
C cleansing the transformer oil
D cooling the transformer oil
The chemical used in breather is
A asbestos fiber
B silica sand
C sodium chloride
D silica gel
Which of the following is the main advantage of an auto-transformer over a two-winding transformer?
A Eddy losses are totally eliminated
B Copper losses are negligible
C Saving in winding material
D Hysteresis losses are reduced
The output transformer used in a power amplifier is a ___________ transformer
A 1:1 ratio
B Step-up
C Step-down
D None of the above
The changes in volume of transformer cooling oil due to variation of atmospheric tem-perature during day and night is taken care of by which part of transformer
A Conservator
B Breather
C Bushings
D Buchholz relay
Which of the following is the main advantage of an auto-transformer over a two winding transformer?
A Hysteresis losses are reduced
B Saving in winding material
C Copper losses are negligible
D Eddy losses are totally eliminated
Power amplifiers generally use transformer coupling because transformer per-mits
A Cooling of the circuit
B Impedance matching
C Distortionless output
D Good frequency response
What is the function of a transformer?
A Transformer is used to step down or up the AC voltages and currents
B Transformer is used to step down or up the DC voltages and currents
C Transformer converts DC to AC voltages
D Transformer converts AC to DC voltages
The function of conservator in a transformer is
A to project against internal fault
B to reduce copper as well as core losses
C to cool the transformer oil
D to take care of the expansion and contraction of transformer oil due to variation of temper-ature of sur-roundings

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