A.prevent the windings from becoming brittle
B.prevent moisture from condensing in the windings during shutdown
C.prevent acidic pitting of the slip rings
D.keep the lube oil warm for quick starting
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A.generate its own electrical power
B.transform electrical energy into mechanical energy
C.increase or decrease circuit voltage as required
D.convert AC current to DC current
A.Glass
B.Bakelite
C.Soft iron
D.Aluminum
A.current flow in a circuit
B.voltage between two points in a circuit
C.circuit continuity
D.power
A.droop
B.drop
C.dip
D.regulation
A.sensor failure
B.failed alarm
C.low level
D.extremely high level
最新試題
Which of the following items don’t belong to dock repair works?（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
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（）
The shipboard oil pollution emergency plan will be invalid after （）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
（） is not installed on the main switchboar.
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）