A.analogger
B.bell logger
C.alarm logger
D.data logger
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A.Polyphase
B.Wound-rotor
C.Induction
D.Synchronous
A.kilowatts
B.ampere-turns
C.kilowatt-volts
D.kilovolt-amperes
A.neutralize armature reaction
B.conduct electric current to an outside circuit
C.convert DC current to AC current
D.provide excitation to a DC generator
A.Open the machine on both ends so as to allow the air and dust to escape
B.Be certain that the circuit breaker is opened and tagged on the feeder panel
C.Be certain that the air is clean and as dry as possible
D.All of the above
A.higher than that of copper
B.lower than that of copper
C.equal to that of copper
D.reached when the conductor it is protecting becomes "white hot"
最新試題
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Which of the following items don’t belong to dock repair works?（）
To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）
The treatment of the fuel oils involves storage, heating, filtering and（）
The shipboard oil pollution emergency plan will be invalid after （）
If separating effect is not good, which measure should be taken （）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
Using a file without a handle may result in （）
The condensers located in various stages of a flash evaporator are cooled by（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）