阿摩線上測驗
28. 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, and hold this position rigidly.
(D) With hands clasped in front of your body.
答案：登入後查看
統計： A(323), B(267), C(88), D(23), E(0) #1799130
統計： A(323), B(267), C(88), D(23), E(0) #1799130
詳解 (共 4 筆)
Eddie
#4343396
How should you signal the crane operator to LOWER the boom?
您應該如何向起重機操作員發出降低吊臂的信號？
(A) With arm extended and fingers closed, point thumb downward.
（A）伸出手臂並合上手指，將拇指指向下方。
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許紘齊
#5905743
(A) 吊臂往下
(B) 吊鉤下放
(C) 停止
(D) 暫停作業（因下雨、旁觀人員過於靠近等）
資料來源：https://www.ccohs.ca/oshanswers/safety_haz/materials_handling/signals.html
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