Iron loss of a transformer can be measured by____________?
Iron loss of a transformer can be measured by____________?
A. low power factor wattmeter
B. unity power factor wattmeter
C. frequency meter
D. any type of wattmeter
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A shell-type transformer has_________?
A shell-type transformer has_________?
A. high eddy current losses
B. reduced magnetic leakage
C. negligibly hysteresis losses
D. none of the aboveThe maximum load that a power transformer can carry is limited by its________________?
The maximum load that a power transformer can carry is limited by its________________?
A. temperature rise
B. dielectric strength of oil
C. voltage ratio
D. copper lossThe transformer oil should have _______ volatility and _______ viscosity?
The transformer oil should have _______ volatility and _______ viscosity?
A. low,low
B. high,high
C. low,high
D. high,lowSumpner’s test is conducted on transformers to determine_____________?
Sumpner’s test is conducted on transformers to determine_____________?
A. temperature
B. stray losses
C. all-day efficiency
D. none of the aboveShort circuit test on transformers is conducted to determine____________?
Short circuit test on transformers is conducted to determine____________?
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current lossesOpen circuit test on transformers is conducted to determine____________?
Open circuit test on transformers is conducted to determine____________?
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current losses