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 signaB.Extend arm with the thumb pointing up，and flex the fingers in and o

raise the boom

raise the hook

raise the boom and hook

check the boom stop

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

Extend arm and point finger in the direction to move the boom

Extend arm with thumb pointing downward and flex fingers in and out

With forearm vertical and forefinger pointing up，move hand in small horizontal circles

With arm extended downwards and forefinger pointing down，move hand in small horizontal circles

Place both fists in front of the body with the thumbs pointing outward

With both arms extended out and palms to down, move arms back and forth

Extend arm with the palm down and and hold this position rigidly

Clasp hands in front of you body

Use one hand to give any miotion signal , and place the other hand motionless in front of the hand giving the motion signal

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 first , and then proceed to use regular signals

Extend arm with the palm down and and hold this position rigidly

Place both fists in front of the body with the thumbs pointing outward each other

Clasp hands in front of you body

Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired

How's that.  

Sure. What can I do for you? 

Not at all.

Which one?

Extend arm with the thumb pointing up and flex the fingers in and out

Place both fists in front of the body with the thumbs pointing upward

With forearm vertical and forefinger pointing up,move hand in small horizond circles

Extend arm with the fingers closed and thumb upward

Radio communications allow the crane operator to disregard the use of hand signals

The crane operators and signalman must be familiar with the correct hand signals

The forward cranes can be operated from the bridge

The aft cranes can be operated from the aft steering station

With both arms extended out and palms to down, move arms back and forth

With arm ertended downwards and forefinger pointing down,move hand in small horizontal crecles

Extend arm and point finger in the direction to move boom

Place both fists in front of the body with the thumbs pointing outward

Extend arm with the palm down and hold this position rigidly

Place clasped hands in front of your body

Extend arm and move hand rapidly right and left with the palm down

Place both fists in front of the body with the thumbs pointing outward

With forearm vertical and forefinger pointing up，move hand in small horizontal circles

With arm extended downwards and forefinger pointing down，move hand in small horizontal circles

Extend arm with fingers closed and thumb pointing upward

Place both fists in front of body with the thumbs pointing upward

Place both fists in front of the body with the thumbs pointing outward each other

Clasp hands in front of your body

Extend arm with the palm down and and hold this position rigidly

Extend arm with the thumb pointing up, and flex the finger s in and out

poor

bad

fair

good