Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signa
Extend arm with the thumb pointing up，and flex the fingers in and out for as long as the load movement is desired
First tap your elbow with one hand and then proceed to use regular signals
First tap the top of your head with your fist and then proceed to use regular signals
第1题：
How should you signal the crane operator to lower the boom and raise the load ________．
A.Extend arm and point finger in the direction to move the boom
B.Extend arm with thumb pointing downward and flex fingers in and out
C.With forearm vertical and forefinger pointing up，move hand in small horizontal circles
D.With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
第2题：
During which condition should the operator of a pedestal crane shutdown operations ________．
A.Bunkering barge alongside
B.Potable water spill on deck
C.Crane hydraulic hose bursts
D.Trim greater than 4 feet
第3题：
The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward．This is the signal to ______．
A.raise the boom
B.raise the hook
C.raise the boom and hook
D.check the boom stop
第4题：
How should you signal the crane operator to dog everyting?______.
A.Place both fists in front of your body with thumbs pointing toward each other
B.Clasp hands in front of your body
C.Extend arm with the palm down and hold this position rigidly
D.Extend arm with the thumb pointing up, and flex the fingers in and out
第5题：
How should you signal the crane operator to lower the boom?______.
A.With arm extended and fingers closed, point thumb downward
B.With arm extended downwards and forefinger pointing down, move hand in small horizontal circles
C.Extend arm with the palm down, and hold this position rigidly
D.With hands clasped in front of your body
第6题：
How should you signal the crane operator to move slowly ________．
A.Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signa
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 fist and then proceed to use regular signals
第7题：
During which condition should be operator of a pedestal crane shutdown operations?
A.Bunkering
B.High winds
C.Potable water spill on deck
D.More than 3°list
第8题：
How should you signal the crane operator to hoist ________．
A.With forearm vertical and forefinger pointing up，move hand in small horizontal circles
B.With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
C.Extend arm with fingers closed and thumb pointing upward
D.Place both fists in front of body with the thumbs pointing upward
第9题：
How should you signal the crane operator to raise the boom?_________.
A.Extend arm with the thumb pointing up and flex the fingers in and out
B.Place both fists in front of the body with the thumbs pointing upward
C.With forearm vertical and forefinger pointing up，move hand in small horizontal circles
D.Extend arm with fingers closed and point thumb upward
第10题：
不要随意地移动稳索。（）