A.has high resistance at low temperatures
B.has a highly polished surface
C.is able to pass current with little opposition
D.holds insulation together well
您可能感興趣的試卷
你可能感興趣的試題
A.analogger
B.bell logger
C.alarm logger
D.data logger
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
最新試題
Flame failure in an automatically fired auxiliary boiler can from a/an （）
Using a file without a handle may result in （）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The condensers located in various stages of a flash evaporator are cooled by（）
Diesel engine air start system check valves are opened by （）
The cetane rating of diesel fuel is an indication of the （）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
The shipboard oil pollution emergency plan will be invalid after （）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）