Deck : Deck General - 370/5076
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| The signal man assisting the crane operator has one hand occupied and one fist in front of his chest with the thumb pointing outward and is tapping his chest with the heel of his fist. This is the signal to __________. |
| A) extend the boom |
| B) hoist the boom |
| C) retract the boom |
| D) lower the boom |
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