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How should you signal the crane operator to stop in an emergency?______.
A.Extend arm with the palm down and hold this position rigidly
B.Placed clasped hands in front of your body
C.Extend arm and move hand rapidly right and left with the palm down
D.Place both fists in front of your body with thumbs pointing pointing outward
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更多 “ How should you signal the crane operator to stop in an emergency?______.A.Extend arm with the palm down and hold this position rigidlyB.Placed clasped hands in front of your bodyC.Extend arm and move hand rapidly right and left with the palm downD.Place both fists in front of your body with thumbs pointing pointing outward ” 相关考题
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With both arms extended out and palms to down, move arms back and forthB
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Extend arm and point finger in the direction to move the boomB
Extend arm with thumb pointing downward and flex fingers in and outC
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With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
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Extend arm with the palm down and hold this position rigidlyB
Place clasped hands in front of your bodyC
Extend arm and move hand rapidly right and left with the palm downD
Place both fists in front of the body with the thumbs pointing outward
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Place both fists in front of the body with the thumbs pointing outwardB
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Place both fists in front of the body with the thumbs pointing outward each otherB
Clasp hands in front of your bodyC
Extend arm with the palm down and and hold this position rigidlyD
Extend arm with the thumb pointing up, and flex the finger s in and out
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Immediately use all the signals at onceB
Use all the signals during the first nightC
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单选题How should you signal the crane operator to raise the boom and lower the load?（）.A
Extend arm with the palm down and and hold this position rigidlyB
Place both fists in front of the body with the thumbs pointing outward each otherC
Clasp hands in front of you bodyD
Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired
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单选题0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.A
vertical positionB
horizontal positionC
boom stop angleD
minimum radius angle
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