1-2 / lesson 11 Hand signals

An extended arm and forefinger tells a crane operator to ? the boom in the direction indicated. a. extend b. lower c. raise d. swing

d. swing

It is important for every crew member to clearly understand basic hand signals. Select one: True False

true

The person giving directions to the operator must be ? . a. able to give directions and speak to those around the fall zone at the same time b. certified c. clearly visible at all times d. dressed in a florescent vest and wearing florescent gloves

c. clearly visible at all times

The signal to have the operator lower the boom and raise the load is given ? . a. hold both fists in front of body with thumbs pointing inward b. with arm extended, hand open, and pushing motion made in direction away from crane c. with arm extended, thumb pointing down, flex fingers in and out d. with left arm extended, thumb pointing upward, right finger pointed down and rotating finger

c. with arm extended, thumb pointing down, flex fingers in and out

There should only be ? person(s) giving the operator signals or directions. a. 1 b. 2 c. 3 d. 4

a. 1

For an emergency stop, extend both arms with the palms ? and move the arms back and forth. a. down b. out c. perpendicular d. up

a. down

When a circular motion with the forefinger pointing up is made, and with the forearm vertical, the worker is signaling the operator to ? . a. lift the load b. lower the boom and lift the load c. raise the boom d. raise the boom and the load

a. lift the load