单项选择题
In the event of failure of an auxiliary such as a lubricating pump, the standby pump is started and put on the line automatically“the line” in this sentence refers to（）
A.fuel manifold
B.lubricating pipe line
C.auxiliary engine pipe line
D.generator output line
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相关考题
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单项选择题
Which of the following is NOT the advantages of the remote control and automation of engine operations?（）
A.Routine supervisory labor particularly the unproductive night-service labor is reduced
B.Engine mal-operation is automatically sensed and manned
C.The engine room need be manned at night in bad weather or close waters
D.Some remedial measures can be taken automatically -
单项选择题
The load rating of an AC generator is determined by the（）
A.internal heat it can withstand
B.load it can carry continuously
C.load it is capable of supplying
D.overload it can carry for a specified time only -
单项选择题
The frequency of the alternating current generated by a synchronous generator is governed by the speed and the（）
A.full excitation
B.load
C.power factor
D.number of poles
