A.portable growler
B.galvanometer
C.visual inspection
D.megohmmeter
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A.over-speed trip
B.reverse power relay
C.back pressure trip
D.governor controls
A.Impedance
B.Current
C.Resistance
D.Voltage
A.Frequency meter
B.Ammeter
C.Voltmeter
D.All of the above
A.thousandth (10 to the-3rd power)
B.millionth (10 to the-6th power)
C.billionth (10 to the-9th power)
D.trillionth (10 to the-12th power)
A.Current and voltage may be in phase
B.Current may lead the voltage
C.Current may lag the voltage
D.All of the above
最新試題
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Using a file without a handle may result in （）
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