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
您可能感興趣的試卷
你可能感興趣的試題
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
Cold weather starting of a diesel engine may be made easier by()
Which of the following items don’t belong to dock repair works?()
Which one is NOT the ‘clear grounds’ for a more detailed inspection?()
When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
()connectors hold best if a wire is accidentally pulled or a connection becomes loose.
Flame failure in an automatically fired auxiliary boiler can from a/an ()
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()
Diesel engine air start system check valves are opened by ()
“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.