A、raise the boom
B、raise the hook
C、raise the boom and hook
D、check the boom stop
更多“The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.”相关的问题
A、In positions in which the noises in the ship are least likely to interfere with the hearing of a fog signal and the man can see clearly B、In positions in which the noises in the ship are much likely to interfere with the hearing of a fog signal C、In positions in which the hearing of a signal is reduced to a minimum D、In a position in which the man can see clearly
A、danger，stay away B、all is clear，it is safe to pass C、the vessel is anchored D、a distress signal
A、danger，stay away B、all is clear，it is safe to pass C、the vessel is anchored D、a distress signal
A、A.One man report the fire, and the other two men fight the fire B、B.One man report the fire, one man fight the fire, and one man evacuate and secure the area C、C.One man report the fire, one man fight the fire, and one man act as a safety observer D、D.All three men fight the fire and report it immediately after it is extinguished
A、the last vessel in the tow B、the last vessel in the tow and it is carrying a crew C、manned，regardless of its position in the tow D、None of the above are correct
A、are required to go to your life-raft B、are dismissed from drills C、should point to the man overboard D、should start the fire pump
A、A.When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signal B、B.Only the stand-on vessel can sound the danger signal C、C.Distress signals may be used in place of the danger signal D、D.The danger signal consists of 4 or more short blasts of the whistle
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