（）does not belong to the mooring trial item.

单项选择题According to the regulation of the voyage trial on new ship,（）is one of the trial items of the UMS ship bridge control.

A.starting and direction changing trial
B.cancelling accelerating function trial
C.lowest stable speed trial
D.continuous running trial

单项选择题During the dock repair, each sea valve must be disassembled, cleaned and ground well.Before it reassemble the sealing surface between the valve and the valve seat should be checked by （）

A.chief engineer
B.surveyor
C.the engineer
D.the technique personnel of the shipyard

单项选择题During the dock repair, when installing the tail shaft and propeller, who should be on the spot to supervise?（）

A.chief engineer
B.the engineer
C.captain
D.any member of the engine department

单项选择题When the vessel entering the dock, the first work that engineer should contact with the shipyard （）

A.releasing the boiler water
B.the explosion detecting and cleaning for the fuel tank
C.the docking project related item
D.shore power and fire fighting water supply

单项选择题When the dock is refilled with water after docking repair, the first work which should be done by engineers is （）

A.igniting boiler
B.releasing air in sea water system
C.starting generator
D.cut off shore power