单项选择题
A.compressed air B.hydraulic oil C.electricity D.All of the above
（） systems are provided with a stand-by device which wi...
单项选择题（） systems are provided with a stand-by device which will automatically be put in use in the even of the running device failing through a fault condition.
A.Alarm B.Monitoring C.Auto start-up D.None of the above
The difference between measured and desired values is c...
单项选择题The difference between measured and desired values is called （）.
A.make-up B.desired value C.deviation D.set value
With UMS, when the engine room is unwatched （） will con...
单项选择题With UMS, when the engine room is unwatched （） will control the main engine.
A.the bridge officer on watch B.the chief engineer C.the duty engineer D.the duty motorman
