單項(xiàng)選擇題How should you signal the crane operator to stop?（）.

A.Place both fists in front of the body with the thumbs pointing outward
B.With both arms extended out and palms to down, move arms back and forth
C.Extend arm with the palm down and and hold this position rigidly
D.Clasp hands in front of you body


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1.單項(xiàng)選擇題How should you signal the crane operator to swing?（）.

A.With both arms extended out and palms to down, move arms back and forth
B.With arm ertended downwards and forefinger pointing down,move hand in small horizontal crecles
C.Extend arm and point finger in the direction to move boom
D.Place both fists in front of the body with the thumbs pointing outward

2.單項(xiàng)選擇題How should you signal the crane operator to use the main hoist?（）.

A.Use one hand to give any miotion signal , and place the other hand motionless in front of the hand giving the motion signal
B.Extend arm with the thumb pointing up , and flex the fingers in and out for as long as the load movement is desired
C.First tap your elbow with one hand , and then proceed to use regular signals
D.First tap the top of your head with your first , and then proceed to use regular signals

3.單項(xiàng)選擇題I have steerage way.It is said that（）.

A.I am underway
B.I am out of control
C.I am not making way through the water
D.I have the amout of movement forward which the ship need to be steered properly

4.單項(xiàng)選擇題I saw your man not operating the winch gear（）gear.

A.in
B.by
C.of
D.against

5.單項(xiàng)選擇題If a davit-launched life raft aboard a vessel cannot be launched because of damage to the davit,you should（）.

A.inflate the life raft on deck
B.roll the life raft over the side
C.go to another life raft station
D.get a saw and cut the life raft free