How should you signal the crane operator to stop in an emergency?（） -题库考试答案搜索网

How should you signal the crane operator to stop in an emergency?（）

单选题

2022-03-12 11:10

A、Extend arm with the palm down and hold this position rigidly
B、Place 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 the body with the thumbs pointing outward

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正确答案

C

试题解析

标签：紧急通信

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