Deck : Deck General - 607/5076
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| How should you signal the crane operator to lower the boom? |
| A) With arm extended downwards and forefinger pointing down, move hand in small horizontal circles. |
| B) Extend arm with the palm down, and hold this position rigidly. |
| C) With hands clasped in front of your body. |
| D) With arm extended and fingers closed, point thumb downward. |
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