How should you signal the crane operator to raise the boom and lower the load?（）.

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• How should you signal the crane operator to dog everthing?（）.

  A . Place both fists in front of the body with the thumbs pointing outward each other B . Clasp hands in front of your body C . Extend arm with the palm down and and hold this position rigidly D . Extend arm with the thumb pointing up, and flex the finger s in and out

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• 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 the thumb pointing downward and flex fingers in and out C . With f rearm vertical and forefinger pointing up,move hand in small horizond circles D . With arm extended downwards and forefinger pointing down,move hand in small horizontal circle

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• 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 horizond circles D . Extend arm with the fingers closed and thumb upward

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  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 signal

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• How should you signal the crane operator to hoist?（）.

  A . With foremarm vertical and forefinfer pointing up ,move hand in small horizonal circles B . With arm ertended downwards and forefinger pointing down,move hand in small horizontal crecles C . Extend arm with fingers closed and thumb pointing upward D . Place both fists in front of the body with the thumbs pointing outward

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